mirror of
https://github.com/edk2-porting/linux-next.git
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8ba75b2028
Using s64 type, instead of long type, for internal calculations and for the sysfs interface. This allows 64-bit values to appear correctly on 32-bit kernels. As wattage is reported in microwatts, monitoring a power supply over 2KW requires this. Although it may seem unlikely to run a 32-bit kernel on such a large machine, enterprise servers often include a BMC, and the BMC might be running a 32-bit kernel. Signed-off-by: Josh Lehan <krellan@google.com> [groeck: Removed Change-Id and other tags, reformatted description] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2617 lines
63 KiB
C
2617 lines
63 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for PMBus devices
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*
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* Copyright (c) 2010, 2011 Ericsson AB.
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* Copyright (c) 2012 Guenter Roeck
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*/
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#include <linux/debugfs.h>
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#include <linux/kernel.h>
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#include <linux/math64.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/jiffies.h>
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#include <linux/pmbus.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include "pmbus.h"
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/*
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* Number of additional attribute pointers to allocate
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* with each call to krealloc
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*/
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#define PMBUS_ATTR_ALLOC_SIZE 32
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/*
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* Index into status register array, per status register group
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*/
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#define PB_STATUS_BASE 0
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#define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
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#define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
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#define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
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#define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
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#define PB_STATUS_TEMP_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
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#define PB_STATUS_INPUT_BASE (PB_STATUS_TEMP_BASE + PMBUS_PAGES)
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#define PB_STATUS_VMON_BASE (PB_STATUS_INPUT_BASE + 1)
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#define PB_NUM_STATUS_REG (PB_STATUS_VMON_BASE + 1)
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#define PMBUS_NAME_SIZE 24
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struct pmbus_sensor {
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struct pmbus_sensor *next;
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char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */
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struct device_attribute attribute;
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u8 page; /* page number */
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u8 phase; /* phase number, 0xff for all phases */
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u16 reg; /* register */
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enum pmbus_sensor_classes class; /* sensor class */
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bool update; /* runtime sensor update needed */
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bool convert; /* Whether or not to apply linear/vid/direct */
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int data; /* Sensor data.
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Negative if there was a read error */
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};
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#define to_pmbus_sensor(_attr) \
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container_of(_attr, struct pmbus_sensor, attribute)
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struct pmbus_boolean {
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char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */
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struct sensor_device_attribute attribute;
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struct pmbus_sensor *s1;
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struct pmbus_sensor *s2;
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};
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#define to_pmbus_boolean(_attr) \
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container_of(_attr, struct pmbus_boolean, attribute)
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struct pmbus_label {
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char name[PMBUS_NAME_SIZE]; /* sysfs label name */
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struct device_attribute attribute;
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char label[PMBUS_NAME_SIZE]; /* label */
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};
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#define to_pmbus_label(_attr) \
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container_of(_attr, struct pmbus_label, attribute)
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struct pmbus_data {
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struct device *dev;
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struct device *hwmon_dev;
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u32 flags; /* from platform data */
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int exponent[PMBUS_PAGES];
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/* linear mode: exponent for output voltages */
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const struct pmbus_driver_info *info;
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int max_attributes;
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int num_attributes;
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struct attribute_group group;
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const struct attribute_group **groups;
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struct dentry *debugfs; /* debugfs device directory */
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struct pmbus_sensor *sensors;
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struct mutex update_lock;
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bool valid;
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unsigned long last_updated; /* in jiffies */
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/*
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* A single status register covers multiple attributes,
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* so we keep them all together.
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*/
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u16 status[PB_NUM_STATUS_REG];
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bool has_status_word; /* device uses STATUS_WORD register */
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int (*read_status)(struct i2c_client *client, int page);
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s16 currpage; /* current page, -1 for unknown/unset */
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s16 currphase; /* current phase, 0xff for all, -1 for unknown/unset */
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};
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struct pmbus_debugfs_entry {
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struct i2c_client *client;
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u8 page;
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u8 reg;
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};
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static const int pmbus_fan_rpm_mask[] = {
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PB_FAN_1_RPM,
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PB_FAN_2_RPM,
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PB_FAN_1_RPM,
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PB_FAN_2_RPM,
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};
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static const int pmbus_fan_config_registers[] = {
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PMBUS_FAN_CONFIG_12,
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PMBUS_FAN_CONFIG_12,
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PMBUS_FAN_CONFIG_34,
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PMBUS_FAN_CONFIG_34
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};
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static const int pmbus_fan_command_registers[] = {
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PMBUS_FAN_COMMAND_1,
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PMBUS_FAN_COMMAND_2,
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PMBUS_FAN_COMMAND_3,
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PMBUS_FAN_COMMAND_4,
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};
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void pmbus_clear_cache(struct i2c_client *client)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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data->valid = false;
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}
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EXPORT_SYMBOL_GPL(pmbus_clear_cache);
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int pmbus_set_page(struct i2c_client *client, int page, int phase)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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int rv;
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if (page < 0)
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return 0;
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if (!(data->info->func[page] & PMBUS_PAGE_VIRTUAL) &&
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data->info->pages > 1 && page != data->currpage) {
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rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
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if (rv < 0)
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return rv;
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rv = i2c_smbus_read_byte_data(client, PMBUS_PAGE);
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if (rv < 0)
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return rv;
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if (rv != page)
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return -EIO;
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}
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data->currpage = page;
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if (data->info->phases[page] && data->currphase != phase &&
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!(data->info->func[page] & PMBUS_PHASE_VIRTUAL)) {
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rv = i2c_smbus_write_byte_data(client, PMBUS_PHASE,
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phase);
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if (rv)
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return rv;
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}
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data->currphase = phase;
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return 0;
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}
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EXPORT_SYMBOL_GPL(pmbus_set_page);
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int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
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{
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int rv;
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rv = pmbus_set_page(client, page, 0xff);
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if (rv < 0)
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return rv;
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return i2c_smbus_write_byte(client, value);
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}
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EXPORT_SYMBOL_GPL(pmbus_write_byte);
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/*
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* _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
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* a device specific mapping function exists and calls it if necessary.
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*/
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static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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int status;
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if (info->write_byte) {
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status = info->write_byte(client, page, value);
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if (status != -ENODATA)
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return status;
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}
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return pmbus_write_byte(client, page, value);
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}
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int pmbus_write_word_data(struct i2c_client *client, int page, u8 reg,
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u16 word)
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{
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int rv;
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rv = pmbus_set_page(client, page, 0xff);
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if (rv < 0)
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return rv;
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return i2c_smbus_write_word_data(client, reg, word);
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}
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EXPORT_SYMBOL_GPL(pmbus_write_word_data);
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static int pmbus_write_virt_reg(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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int bit;
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int id;
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int rv;
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switch (reg) {
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case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4:
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id = reg - PMBUS_VIRT_FAN_TARGET_1;
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bit = pmbus_fan_rpm_mask[id];
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rv = pmbus_update_fan(client, page, id, bit, bit, word);
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break;
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default:
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rv = -ENXIO;
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break;
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}
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return rv;
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}
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/*
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* _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if
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* a device specific mapping function exists and calls it if necessary.
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*/
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static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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int status;
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if (info->write_word_data) {
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status = info->write_word_data(client, page, reg, word);
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if (status != -ENODATA)
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return status;
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}
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if (reg >= PMBUS_VIRT_BASE)
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return pmbus_write_virt_reg(client, page, reg, word);
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return pmbus_write_word_data(client, page, reg, word);
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}
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int pmbus_update_fan(struct i2c_client *client, int page, int id,
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u8 config, u8 mask, u16 command)
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{
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int from;
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int rv;
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u8 to;
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from = pmbus_read_byte_data(client, page,
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pmbus_fan_config_registers[id]);
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if (from < 0)
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return from;
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to = (from & ~mask) | (config & mask);
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if (to != from) {
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rv = pmbus_write_byte_data(client, page,
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pmbus_fan_config_registers[id], to);
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if (rv < 0)
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return rv;
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}
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return _pmbus_write_word_data(client, page,
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pmbus_fan_command_registers[id], command);
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}
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EXPORT_SYMBOL_GPL(pmbus_update_fan);
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int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg)
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{
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int rv;
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rv = pmbus_set_page(client, page, phase);
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if (rv < 0)
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return rv;
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return i2c_smbus_read_word_data(client, reg);
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}
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EXPORT_SYMBOL_GPL(pmbus_read_word_data);
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static int pmbus_read_virt_reg(struct i2c_client *client, int page, int reg)
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{
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int rv;
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int id;
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switch (reg) {
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case PMBUS_VIRT_FAN_TARGET_1 ... PMBUS_VIRT_FAN_TARGET_4:
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id = reg - PMBUS_VIRT_FAN_TARGET_1;
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rv = pmbus_get_fan_rate_device(client, page, id, rpm);
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break;
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default:
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rv = -ENXIO;
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break;
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}
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return rv;
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}
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/*
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* _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if
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* a device specific mapping function exists and calls it if necessary.
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*/
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static int _pmbus_read_word_data(struct i2c_client *client, int page,
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int phase, int reg)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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int status;
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if (info->read_word_data) {
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status = info->read_word_data(client, page, phase, reg);
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if (status != -ENODATA)
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return status;
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}
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if (reg >= PMBUS_VIRT_BASE)
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return pmbus_read_virt_reg(client, page, reg);
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return pmbus_read_word_data(client, page, phase, reg);
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}
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/* Same as above, but without phase parameter, for use in check functions */
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static int __pmbus_read_word_data(struct i2c_client *client, int page, int reg)
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{
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return _pmbus_read_word_data(client, page, 0xff, reg);
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}
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int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg)
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{
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int rv;
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rv = pmbus_set_page(client, page, 0xff);
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if (rv < 0)
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return rv;
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return i2c_smbus_read_byte_data(client, reg);
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}
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EXPORT_SYMBOL_GPL(pmbus_read_byte_data);
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int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value)
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{
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int rv;
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rv = pmbus_set_page(client, page, 0xff);
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if (rv < 0)
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return rv;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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EXPORT_SYMBOL_GPL(pmbus_write_byte_data);
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int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
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u8 mask, u8 value)
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{
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unsigned int tmp;
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int rv;
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rv = pmbus_read_byte_data(client, page, reg);
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if (rv < 0)
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return rv;
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tmp = (rv & ~mask) | (value & mask);
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if (tmp != rv)
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rv = pmbus_write_byte_data(client, page, reg, tmp);
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return rv;
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}
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EXPORT_SYMBOL_GPL(pmbus_update_byte_data);
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/*
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* _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
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* a device specific mapping function exists and calls it if necessary.
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*/
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static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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int status;
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if (info->read_byte_data) {
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status = info->read_byte_data(client, page, reg);
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if (status != -ENODATA)
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return status;
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}
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return pmbus_read_byte_data(client, page, reg);
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}
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static struct pmbus_sensor *pmbus_find_sensor(struct pmbus_data *data, int page,
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int reg)
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{
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struct pmbus_sensor *sensor;
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for (sensor = data->sensors; sensor; sensor = sensor->next) {
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if (sensor->page == page && sensor->reg == reg)
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return sensor;
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}
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return ERR_PTR(-EINVAL);
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}
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static int pmbus_get_fan_rate(struct i2c_client *client, int page, int id,
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enum pmbus_fan_mode mode,
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bool from_cache)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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bool want_rpm, have_rpm;
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struct pmbus_sensor *s;
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int config;
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int reg;
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want_rpm = (mode == rpm);
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if (from_cache) {
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reg = want_rpm ? PMBUS_VIRT_FAN_TARGET_1 : PMBUS_VIRT_PWM_1;
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s = pmbus_find_sensor(data, page, reg + id);
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if (IS_ERR(s))
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return PTR_ERR(s);
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return s->data;
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}
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config = pmbus_read_byte_data(client, page,
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pmbus_fan_config_registers[id]);
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if (config < 0)
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return config;
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have_rpm = !!(config & pmbus_fan_rpm_mask[id]);
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if (want_rpm == have_rpm)
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return pmbus_read_word_data(client, page, 0xff,
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pmbus_fan_command_registers[id]);
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/* Can't sensibly map between RPM and PWM, just return zero */
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return 0;
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}
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int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id,
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enum pmbus_fan_mode mode)
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{
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return pmbus_get_fan_rate(client, page, id, mode, false);
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}
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EXPORT_SYMBOL_GPL(pmbus_get_fan_rate_device);
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int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id,
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enum pmbus_fan_mode mode)
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{
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return pmbus_get_fan_rate(client, page, id, mode, true);
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}
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EXPORT_SYMBOL_GPL(pmbus_get_fan_rate_cached);
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static void pmbus_clear_fault_page(struct i2c_client *client, int page)
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{
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_pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
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}
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void pmbus_clear_faults(struct i2c_client *client)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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int i;
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for (i = 0; i < data->info->pages; i++)
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pmbus_clear_fault_page(client, i);
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}
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EXPORT_SYMBOL_GPL(pmbus_clear_faults);
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static int pmbus_check_status_cml(struct i2c_client *client)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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int status, status2;
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status = data->read_status(client, -1);
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|
if (status < 0 || (status & PB_STATUS_CML)) {
|
|
status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
|
|
if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND))
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool pmbus_check_register(struct i2c_client *client,
|
|
int (*func)(struct i2c_client *client,
|
|
int page, int reg),
|
|
int page, int reg)
|
|
{
|
|
int rv;
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
|
|
rv = func(client, page, reg);
|
|
if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
|
|
rv = pmbus_check_status_cml(client);
|
|
pmbus_clear_fault_page(client, -1);
|
|
return rv >= 0;
|
|
}
|
|
|
|
static bool pmbus_check_status_register(struct i2c_client *client, int page)
|
|
{
|
|
int status;
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
|
|
status = data->read_status(client, page);
|
|
if (status >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK) &&
|
|
(status & PB_STATUS_CML)) {
|
|
status = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
|
|
if (status < 0 || (status & PB_CML_FAULT_INVALID_COMMAND))
|
|
status = -EIO;
|
|
}
|
|
|
|
pmbus_clear_fault_page(client, -1);
|
|
return status >= 0;
|
|
}
|
|
|
|
bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg)
|
|
{
|
|
return pmbus_check_register(client, _pmbus_read_byte_data, page, reg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_check_byte_register);
|
|
|
|
bool pmbus_check_word_register(struct i2c_client *client, int page, int reg)
|
|
{
|
|
return pmbus_check_register(client, __pmbus_read_word_data, page, reg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_check_word_register);
|
|
|
|
const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client)
|
|
{
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
|
|
return data->info;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_get_driver_info);
|
|
|
|
static struct _pmbus_status {
|
|
u32 func;
|
|
u16 base;
|
|
u16 reg;
|
|
} pmbus_status[] = {
|
|
{ PMBUS_HAVE_STATUS_VOUT, PB_STATUS_VOUT_BASE, PMBUS_STATUS_VOUT },
|
|
{ PMBUS_HAVE_STATUS_IOUT, PB_STATUS_IOUT_BASE, PMBUS_STATUS_IOUT },
|
|
{ PMBUS_HAVE_STATUS_TEMP, PB_STATUS_TEMP_BASE,
|
|
PMBUS_STATUS_TEMPERATURE },
|
|
{ PMBUS_HAVE_STATUS_FAN12, PB_STATUS_FAN_BASE, PMBUS_STATUS_FAN_12 },
|
|
{ PMBUS_HAVE_STATUS_FAN34, PB_STATUS_FAN34_BASE, PMBUS_STATUS_FAN_34 },
|
|
};
|
|
|
|
static struct pmbus_data *pmbus_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
const struct pmbus_driver_info *info = data->info;
|
|
struct pmbus_sensor *sensor;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
|
|
int i, j;
|
|
|
|
for (i = 0; i < info->pages; i++) {
|
|
data->status[PB_STATUS_BASE + i]
|
|
= data->read_status(client, i);
|
|
for (j = 0; j < ARRAY_SIZE(pmbus_status); j++) {
|
|
struct _pmbus_status *s = &pmbus_status[j];
|
|
|
|
if (!(info->func[i] & s->func))
|
|
continue;
|
|
data->status[s->base + i]
|
|
= _pmbus_read_byte_data(client, i,
|
|
s->reg);
|
|
}
|
|
}
|
|
|
|
if (info->func[0] & PMBUS_HAVE_STATUS_INPUT)
|
|
data->status[PB_STATUS_INPUT_BASE]
|
|
= _pmbus_read_byte_data(client, 0,
|
|
PMBUS_STATUS_INPUT);
|
|
|
|
if (info->func[0] & PMBUS_HAVE_STATUS_VMON)
|
|
data->status[PB_STATUS_VMON_BASE]
|
|
= _pmbus_read_byte_data(client, 0,
|
|
PMBUS_VIRT_STATUS_VMON);
|
|
|
|
for (sensor = data->sensors; sensor; sensor = sensor->next) {
|
|
if (!data->valid || sensor->update)
|
|
sensor->data
|
|
= _pmbus_read_word_data(client,
|
|
sensor->page,
|
|
sensor->phase,
|
|
sensor->reg);
|
|
}
|
|
pmbus_clear_faults(client);
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
mutex_unlock(&data->update_lock);
|
|
return data;
|
|
}
|
|
|
|
/*
|
|
* Convert linear sensor values to milli- or micro-units
|
|
* depending on sensor type.
|
|
*/
|
|
static s64 pmbus_reg2data_linear(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor)
|
|
{
|
|
s16 exponent;
|
|
s32 mantissa;
|
|
s64 val;
|
|
|
|
if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */
|
|
exponent = data->exponent[sensor->page];
|
|
mantissa = (u16) sensor->data;
|
|
} else { /* LINEAR11 */
|
|
exponent = ((s16)sensor->data) >> 11;
|
|
mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5;
|
|
}
|
|
|
|
val = mantissa;
|
|
|
|
/* scale result to milli-units for all sensors except fans */
|
|
if (sensor->class != PSC_FAN)
|
|
val = val * 1000LL;
|
|
|
|
/* scale result to micro-units for power sensors */
|
|
if (sensor->class == PSC_POWER)
|
|
val = val * 1000LL;
|
|
|
|
if (exponent >= 0)
|
|
val <<= exponent;
|
|
else
|
|
val >>= -exponent;
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Convert direct sensor values to milli- or micro-units
|
|
* depending on sensor type.
|
|
*/
|
|
static s64 pmbus_reg2data_direct(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor)
|
|
{
|
|
s64 b, val = (s16)sensor->data;
|
|
s32 m, R;
|
|
|
|
m = data->info->m[sensor->class];
|
|
b = data->info->b[sensor->class];
|
|
R = data->info->R[sensor->class];
|
|
|
|
if (m == 0)
|
|
return 0;
|
|
|
|
/* X = 1/m * (Y * 10^-R - b) */
|
|
R = -R;
|
|
/* scale result to milli-units for everything but fans */
|
|
if (!(sensor->class == PSC_FAN || sensor->class == PSC_PWM)) {
|
|
R += 3;
|
|
b *= 1000;
|
|
}
|
|
|
|
/* scale result to micro-units for power sensors */
|
|
if (sensor->class == PSC_POWER) {
|
|
R += 3;
|
|
b *= 1000;
|
|
}
|
|
|
|
while (R > 0) {
|
|
val *= 10;
|
|
R--;
|
|
}
|
|
while (R < 0) {
|
|
val = div_s64(val + 5LL, 10L); /* round closest */
|
|
R++;
|
|
}
|
|
|
|
val = div_s64(val - b, m);
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Convert VID sensor values to milli- or micro-units
|
|
* depending on sensor type.
|
|
*/
|
|
static s64 pmbus_reg2data_vid(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor)
|
|
{
|
|
long val = sensor->data;
|
|
long rv = 0;
|
|
|
|
switch (data->info->vrm_version[sensor->page]) {
|
|
case vr11:
|
|
if (val >= 0x02 && val <= 0xb2)
|
|
rv = DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
|
|
break;
|
|
case vr12:
|
|
if (val >= 0x01)
|
|
rv = 250 + (val - 1) * 5;
|
|
break;
|
|
case vr13:
|
|
if (val >= 0x01)
|
|
rv = 500 + (val - 1) * 10;
|
|
break;
|
|
case imvp9:
|
|
if (val >= 0x01)
|
|
rv = 200 + (val - 1) * 10;
|
|
break;
|
|
case amd625mv:
|
|
if (val >= 0x0 && val <= 0xd8)
|
|
rv = DIV_ROUND_CLOSEST(155000 - val * 625, 100);
|
|
break;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static s64 pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
|
|
{
|
|
s64 val;
|
|
|
|
if (!sensor->convert)
|
|
return sensor->data;
|
|
|
|
switch (data->info->format[sensor->class]) {
|
|
case direct:
|
|
val = pmbus_reg2data_direct(data, sensor);
|
|
break;
|
|
case vid:
|
|
val = pmbus_reg2data_vid(data, sensor);
|
|
break;
|
|
case linear:
|
|
default:
|
|
val = pmbus_reg2data_linear(data, sensor);
|
|
break;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
#define MAX_MANTISSA (1023 * 1000)
|
|
#define MIN_MANTISSA (511 * 1000)
|
|
|
|
static u16 pmbus_data2reg_linear(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor, s64 val)
|
|
{
|
|
s16 exponent = 0, mantissa;
|
|
bool negative = false;
|
|
|
|
/* simple case */
|
|
if (val == 0)
|
|
return 0;
|
|
|
|
if (sensor->class == PSC_VOLTAGE_OUT) {
|
|
/* LINEAR16 does not support negative voltages */
|
|
if (val < 0)
|
|
return 0;
|
|
|
|
/*
|
|
* For a static exponents, we don't have a choice
|
|
* but to adjust the value to it.
|
|
*/
|
|
if (data->exponent[sensor->page] < 0)
|
|
val <<= -data->exponent[sensor->page];
|
|
else
|
|
val >>= data->exponent[sensor->page];
|
|
val = DIV_ROUND_CLOSEST_ULL(val, 1000);
|
|
return clamp_val(val, 0, 0xffff);
|
|
}
|
|
|
|
if (val < 0) {
|
|
negative = true;
|
|
val = -val;
|
|
}
|
|
|
|
/* Power is in uW. Convert to mW before converting. */
|
|
if (sensor->class == PSC_POWER)
|
|
val = DIV_ROUND_CLOSEST_ULL(val, 1000);
|
|
|
|
/*
|
|
* For simplicity, convert fan data to milli-units
|
|
* before calculating the exponent.
|
|
*/
|
|
if (sensor->class == PSC_FAN)
|
|
val = val * 1000LL;
|
|
|
|
/* Reduce large mantissa until it fits into 10 bit */
|
|
while (val >= MAX_MANTISSA && exponent < 15) {
|
|
exponent++;
|
|
val >>= 1;
|
|
}
|
|
/* Increase small mantissa to improve precision */
|
|
while (val < MIN_MANTISSA && exponent > -15) {
|
|
exponent--;
|
|
val <<= 1;
|
|
}
|
|
|
|
/* Convert mantissa from milli-units to units */
|
|
mantissa = clamp_val(DIV_ROUND_CLOSEST_ULL(val, 1000), 0, 0x3ff);
|
|
|
|
/* restore sign */
|
|
if (negative)
|
|
mantissa = -mantissa;
|
|
|
|
/* Convert to 5 bit exponent, 11 bit mantissa */
|
|
return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
|
|
}
|
|
|
|
static u16 pmbus_data2reg_direct(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor, s64 val)
|
|
{
|
|
s64 b;
|
|
s32 m, R;
|
|
|
|
m = data->info->m[sensor->class];
|
|
b = data->info->b[sensor->class];
|
|
R = data->info->R[sensor->class];
|
|
|
|
/* Power is in uW. Adjust R and b. */
|
|
if (sensor->class == PSC_POWER) {
|
|
R -= 3;
|
|
b *= 1000;
|
|
}
|
|
|
|
/* Calculate Y = (m * X + b) * 10^R */
|
|
if (!(sensor->class == PSC_FAN || sensor->class == PSC_PWM)) {
|
|
R -= 3; /* Adjust R and b for data in milli-units */
|
|
b *= 1000;
|
|
}
|
|
val = val * m + b;
|
|
|
|
while (R > 0) {
|
|
val *= 10;
|
|
R--;
|
|
}
|
|
while (R < 0) {
|
|
val = div_s64(val + 5LL, 10L); /* round closest */
|
|
R++;
|
|
}
|
|
|
|
return (u16)clamp_val(val, S16_MIN, S16_MAX);
|
|
}
|
|
|
|
static u16 pmbus_data2reg_vid(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor, s64 val)
|
|
{
|
|
val = clamp_val(val, 500, 1600);
|
|
|
|
return 2 + DIV_ROUND_CLOSEST_ULL((1600LL - val) * 100LL, 625);
|
|
}
|
|
|
|
static u16 pmbus_data2reg(struct pmbus_data *data,
|
|
struct pmbus_sensor *sensor, s64 val)
|
|
{
|
|
u16 regval;
|
|
|
|
if (!sensor->convert)
|
|
return val;
|
|
|
|
switch (data->info->format[sensor->class]) {
|
|
case direct:
|
|
regval = pmbus_data2reg_direct(data, sensor, val);
|
|
break;
|
|
case vid:
|
|
regval = pmbus_data2reg_vid(data, sensor, val);
|
|
break;
|
|
case linear:
|
|
default:
|
|
regval = pmbus_data2reg_linear(data, sensor, val);
|
|
break;
|
|
}
|
|
return regval;
|
|
}
|
|
|
|
/*
|
|
* Return boolean calculated from converted data.
|
|
* <index> defines a status register index and mask.
|
|
* The mask is in the lower 8 bits, the register index is in bits 8..23.
|
|
*
|
|
* The associated pmbus_boolean structure contains optional pointers to two
|
|
* sensor attributes. If specified, those attributes are compared against each
|
|
* other to determine if a limit has been exceeded.
|
|
*
|
|
* If the sensor attribute pointers are NULL, the function returns true if
|
|
* (status[reg] & mask) is true.
|
|
*
|
|
* If sensor attribute pointers are provided, a comparison against a specified
|
|
* limit has to be performed to determine the boolean result.
|
|
* In this case, the function returns true if v1 >= v2 (where v1 and v2 are
|
|
* sensor values referenced by sensor attribute pointers s1 and s2).
|
|
*
|
|
* To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>.
|
|
* To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>.
|
|
*
|
|
* If a negative value is stored in any of the referenced registers, this value
|
|
* reflects an error code which will be returned.
|
|
*/
|
|
static int pmbus_get_boolean(struct pmbus_data *data, struct pmbus_boolean *b,
|
|
int index)
|
|
{
|
|
struct pmbus_sensor *s1 = b->s1;
|
|
struct pmbus_sensor *s2 = b->s2;
|
|
u16 reg = (index >> 16) & 0xffff;
|
|
u16 mask = index & 0xffff;
|
|
int ret, status;
|
|
u16 regval;
|
|
|
|
status = data->status[reg];
|
|
if (status < 0)
|
|
return status;
|
|
|
|
regval = status & mask;
|
|
if (!s1 && !s2) {
|
|
ret = !!regval;
|
|
} else if (!s1 || !s2) {
|
|
WARN(1, "Bad boolean descriptor %p: s1=%p, s2=%p\n", b, s1, s2);
|
|
return 0;
|
|
} else {
|
|
s64 v1, v2;
|
|
|
|
if (s1->data < 0)
|
|
return s1->data;
|
|
if (s2->data < 0)
|
|
return s2->data;
|
|
|
|
v1 = pmbus_reg2data(data, s1);
|
|
v2 = pmbus_reg2data(data, s2);
|
|
ret = !!(regval && v1 >= v2);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t pmbus_show_boolean(struct device *dev,
|
|
struct device_attribute *da, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
|
|
struct pmbus_boolean *boolean = to_pmbus_boolean(attr);
|
|
struct pmbus_data *data = pmbus_update_device(dev);
|
|
int val;
|
|
|
|
val = pmbus_get_boolean(data, boolean, attr->index);
|
|
if (val < 0)
|
|
return val;
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t pmbus_show_sensor(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct pmbus_data *data = pmbus_update_device(dev);
|
|
struct pmbus_sensor *sensor = to_pmbus_sensor(devattr);
|
|
|
|
if (sensor->data < 0)
|
|
return sensor->data;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%lld\n", pmbus_reg2data(data, sensor));
|
|
}
|
|
|
|
static ssize_t pmbus_set_sensor(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
struct pmbus_sensor *sensor = to_pmbus_sensor(devattr);
|
|
ssize_t rv = count;
|
|
s64 val;
|
|
int ret;
|
|
u16 regval;
|
|
|
|
if (kstrtos64(buf, 10, &val) < 0)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
regval = pmbus_data2reg(data, sensor, val);
|
|
ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval);
|
|
if (ret < 0)
|
|
rv = ret;
|
|
else
|
|
sensor->data = regval;
|
|
mutex_unlock(&data->update_lock);
|
|
return rv;
|
|
}
|
|
|
|
static ssize_t pmbus_show_label(struct device *dev,
|
|
struct device_attribute *da, char *buf)
|
|
{
|
|
struct pmbus_label *label = to_pmbus_label(da);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", label->label);
|
|
}
|
|
|
|
static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr)
|
|
{
|
|
if (data->num_attributes >= data->max_attributes - 1) {
|
|
int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE;
|
|
void *new_attrs = krealloc(data->group.attrs,
|
|
new_max_attrs * sizeof(void *),
|
|
GFP_KERNEL);
|
|
if (!new_attrs)
|
|
return -ENOMEM;
|
|
data->group.attrs = new_attrs;
|
|
data->max_attributes = new_max_attrs;
|
|
}
|
|
|
|
data->group.attrs[data->num_attributes++] = attr;
|
|
data->group.attrs[data->num_attributes] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static void pmbus_dev_attr_init(struct device_attribute *dev_attr,
|
|
const char *name,
|
|
umode_t mode,
|
|
ssize_t (*show)(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf),
|
|
ssize_t (*store)(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count))
|
|
{
|
|
sysfs_attr_init(&dev_attr->attr);
|
|
dev_attr->attr.name = name;
|
|
dev_attr->attr.mode = mode;
|
|
dev_attr->show = show;
|
|
dev_attr->store = store;
|
|
}
|
|
|
|
static void pmbus_attr_init(struct sensor_device_attribute *a,
|
|
const char *name,
|
|
umode_t mode,
|
|
ssize_t (*show)(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf),
|
|
ssize_t (*store)(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count),
|
|
int idx)
|
|
{
|
|
pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store);
|
|
a->index = idx;
|
|
}
|
|
|
|
static int pmbus_add_boolean(struct pmbus_data *data,
|
|
const char *name, const char *type, int seq,
|
|
struct pmbus_sensor *s1,
|
|
struct pmbus_sensor *s2,
|
|
u16 reg, u16 mask)
|
|
{
|
|
struct pmbus_boolean *boolean;
|
|
struct sensor_device_attribute *a;
|
|
|
|
boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL);
|
|
if (!boolean)
|
|
return -ENOMEM;
|
|
|
|
a = &boolean->attribute;
|
|
|
|
snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s",
|
|
name, seq, type);
|
|
boolean->s1 = s1;
|
|
boolean->s2 = s2;
|
|
pmbus_attr_init(a, boolean->name, 0444, pmbus_show_boolean, NULL,
|
|
(reg << 16) | mask);
|
|
|
|
return pmbus_add_attribute(data, &a->dev_attr.attr);
|
|
}
|
|
|
|
static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data,
|
|
const char *name, const char *type,
|
|
int seq, int page, int phase,
|
|
int reg,
|
|
enum pmbus_sensor_classes class,
|
|
bool update, bool readonly,
|
|
bool convert)
|
|
{
|
|
struct pmbus_sensor *sensor;
|
|
struct device_attribute *a;
|
|
|
|
sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL);
|
|
if (!sensor)
|
|
return NULL;
|
|
a = &sensor->attribute;
|
|
|
|
if (type)
|
|
snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s",
|
|
name, seq, type);
|
|
else
|
|
snprintf(sensor->name, sizeof(sensor->name), "%s%d",
|
|
name, seq);
|
|
|
|
if (data->flags & PMBUS_WRITE_PROTECTED)
|
|
readonly = true;
|
|
|
|
sensor->page = page;
|
|
sensor->phase = phase;
|
|
sensor->reg = reg;
|
|
sensor->class = class;
|
|
sensor->update = update;
|
|
sensor->convert = convert;
|
|
pmbus_dev_attr_init(a, sensor->name,
|
|
readonly ? 0444 : 0644,
|
|
pmbus_show_sensor, pmbus_set_sensor);
|
|
|
|
if (pmbus_add_attribute(data, &a->attr))
|
|
return NULL;
|
|
|
|
sensor->next = data->sensors;
|
|
data->sensors = sensor;
|
|
|
|
return sensor;
|
|
}
|
|
|
|
static int pmbus_add_label(struct pmbus_data *data,
|
|
const char *name, int seq,
|
|
const char *lstring, int index, int phase)
|
|
{
|
|
struct pmbus_label *label;
|
|
struct device_attribute *a;
|
|
|
|
label = devm_kzalloc(data->dev, sizeof(*label), GFP_KERNEL);
|
|
if (!label)
|
|
return -ENOMEM;
|
|
|
|
a = &label->attribute;
|
|
|
|
snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq);
|
|
if (!index) {
|
|
if (phase == 0xff)
|
|
strncpy(label->label, lstring,
|
|
sizeof(label->label) - 1);
|
|
else
|
|
snprintf(label->label, sizeof(label->label), "%s.%d",
|
|
lstring, phase);
|
|
} else {
|
|
if (phase == 0xff)
|
|
snprintf(label->label, sizeof(label->label), "%s%d",
|
|
lstring, index);
|
|
else
|
|
snprintf(label->label, sizeof(label->label), "%s%d.%d",
|
|
lstring, index, phase);
|
|
}
|
|
|
|
pmbus_dev_attr_init(a, label->name, 0444, pmbus_show_label, NULL);
|
|
return pmbus_add_attribute(data, &a->attr);
|
|
}
|
|
|
|
/*
|
|
* Search for attributes. Allocate sensors, booleans, and labels as needed.
|
|
*/
|
|
|
|
/*
|
|
* The pmbus_limit_attr structure describes a single limit attribute
|
|
* and its associated alarm attribute.
|
|
*/
|
|
struct pmbus_limit_attr {
|
|
u16 reg; /* Limit register */
|
|
u16 sbit; /* Alarm attribute status bit */
|
|
bool update; /* True if register needs updates */
|
|
bool low; /* True if low limit; for limits with compare
|
|
functions only */
|
|
const char *attr; /* Attribute name */
|
|
const char *alarm; /* Alarm attribute name */
|
|
};
|
|
|
|
/*
|
|
* The pmbus_sensor_attr structure describes one sensor attribute. This
|
|
* description includes a reference to the associated limit attributes.
|
|
*/
|
|
struct pmbus_sensor_attr {
|
|
u16 reg; /* sensor register */
|
|
u16 gbit; /* generic status bit */
|
|
u8 nlimit; /* # of limit registers */
|
|
enum pmbus_sensor_classes class;/* sensor class */
|
|
const char *label; /* sensor label */
|
|
bool paged; /* true if paged sensor */
|
|
bool update; /* true if update needed */
|
|
bool compare; /* true if compare function needed */
|
|
u32 func; /* sensor mask */
|
|
u32 sfunc; /* sensor status mask */
|
|
int sbase; /* status base register */
|
|
const struct pmbus_limit_attr *limit;/* limit registers */
|
|
};
|
|
|
|
/*
|
|
* Add a set of limit attributes and, if supported, the associated
|
|
* alarm attributes.
|
|
* returns 0 if no alarm register found, 1 if an alarm register was found,
|
|
* < 0 on errors.
|
|
*/
|
|
static int pmbus_add_limit_attrs(struct i2c_client *client,
|
|
struct pmbus_data *data,
|
|
const struct pmbus_driver_info *info,
|
|
const char *name, int index, int page,
|
|
struct pmbus_sensor *base,
|
|
const struct pmbus_sensor_attr *attr)
|
|
{
|
|
const struct pmbus_limit_attr *l = attr->limit;
|
|
int nlimit = attr->nlimit;
|
|
int have_alarm = 0;
|
|
int i, ret;
|
|
struct pmbus_sensor *curr;
|
|
|
|
for (i = 0; i < nlimit; i++) {
|
|
if (pmbus_check_word_register(client, page, l->reg)) {
|
|
curr = pmbus_add_sensor(data, name, l->attr, index,
|
|
page, 0xff, l->reg, attr->class,
|
|
attr->update || l->update,
|
|
false, true);
|
|
if (!curr)
|
|
return -ENOMEM;
|
|
if (l->sbit && (info->func[page] & attr->sfunc)) {
|
|
ret = pmbus_add_boolean(data, name,
|
|
l->alarm, index,
|
|
attr->compare ? l->low ? curr : base
|
|
: NULL,
|
|
attr->compare ? l->low ? base : curr
|
|
: NULL,
|
|
attr->sbase + page, l->sbit);
|
|
if (ret)
|
|
return ret;
|
|
have_alarm = 1;
|
|
}
|
|
}
|
|
l++;
|
|
}
|
|
return have_alarm;
|
|
}
|
|
|
|
static int pmbus_add_sensor_attrs_one(struct i2c_client *client,
|
|
struct pmbus_data *data,
|
|
const struct pmbus_driver_info *info,
|
|
const char *name,
|
|
int index, int page, int phase,
|
|
const struct pmbus_sensor_attr *attr,
|
|
bool paged)
|
|
{
|
|
struct pmbus_sensor *base;
|
|
bool upper = !!(attr->gbit & 0xff00); /* need to check STATUS_WORD */
|
|
int ret;
|
|
|
|
if (attr->label) {
|
|
ret = pmbus_add_label(data, name, index, attr->label,
|
|
paged ? page + 1 : 0, phase);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
base = pmbus_add_sensor(data, name, "input", index, page, phase,
|
|
attr->reg, attr->class, true, true, true);
|
|
if (!base)
|
|
return -ENOMEM;
|
|
/* No limit and alarm attributes for phase specific sensors */
|
|
if (attr->sfunc && phase == 0xff) {
|
|
ret = pmbus_add_limit_attrs(client, data, info, name,
|
|
index, page, base, attr);
|
|
if (ret < 0)
|
|
return ret;
|
|
/*
|
|
* Add generic alarm attribute only if there are no individual
|
|
* alarm attributes, if there is a global alarm bit, and if
|
|
* the generic status register (word or byte, depending on
|
|
* which global bit is set) for this page is accessible.
|
|
*/
|
|
if (!ret && attr->gbit &&
|
|
(!upper || (upper && data->has_status_word)) &&
|
|
pmbus_check_status_register(client, page)) {
|
|
ret = pmbus_add_boolean(data, name, "alarm", index,
|
|
NULL, NULL,
|
|
PB_STATUS_BASE + page,
|
|
attr->gbit);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool pmbus_sensor_is_paged(const struct pmbus_driver_info *info,
|
|
const struct pmbus_sensor_attr *attr)
|
|
{
|
|
int p;
|
|
|
|
if (attr->paged)
|
|
return true;
|
|
|
|
/*
|
|
* Some attributes may be present on more than one page despite
|
|
* not being marked with the paged attribute. If that is the case,
|
|
* then treat the sensor as being paged and add the page suffix to the
|
|
* attribute name.
|
|
* We don't just add the paged attribute to all such attributes, in
|
|
* order to maintain the un-suffixed labels in the case where the
|
|
* attribute is only on page 0.
|
|
*/
|
|
for (p = 1; p < info->pages; p++) {
|
|
if (info->func[p] & attr->func)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static int pmbus_add_sensor_attrs(struct i2c_client *client,
|
|
struct pmbus_data *data,
|
|
const char *name,
|
|
const struct pmbus_sensor_attr *attrs,
|
|
int nattrs)
|
|
{
|
|
const struct pmbus_driver_info *info = data->info;
|
|
int index, i;
|
|
int ret;
|
|
|
|
index = 1;
|
|
for (i = 0; i < nattrs; i++) {
|
|
int page, pages;
|
|
bool paged = pmbus_sensor_is_paged(info, attrs);
|
|
|
|
pages = paged ? info->pages : 1;
|
|
for (page = 0; page < pages; page++) {
|
|
if (!(info->func[page] & attrs->func))
|
|
continue;
|
|
ret = pmbus_add_sensor_attrs_one(client, data, info,
|
|
name, index, page,
|
|
0xff, attrs, paged);
|
|
if (ret)
|
|
return ret;
|
|
index++;
|
|
if (info->phases[page]) {
|
|
int phase;
|
|
|
|
for (phase = 0; phase < info->phases[page];
|
|
phase++) {
|
|
if (!(info->pfunc[phase] & attrs->func))
|
|
continue;
|
|
ret = pmbus_add_sensor_attrs_one(client,
|
|
data, info, name, index, page,
|
|
phase, attrs, paged);
|
|
if (ret)
|
|
return ret;
|
|
index++;
|
|
}
|
|
}
|
|
}
|
|
attrs++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct pmbus_limit_attr vin_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_VIN_UV_WARN_LIMIT,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_VOLTAGE_UV_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VIN_UV_FAULT_LIMIT,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_VOLTAGE_UV_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIN_OV_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_VOLTAGE_OV_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VIN_OV_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_VOLTAGE_OV_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VIN_AVG,
|
|
.update = true,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VIN_MIN,
|
|
.update = true,
|
|
.attr = "lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VIN_MAX,
|
|
.update = true,
|
|
.attr = "highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_VIN_HISTORY,
|
|
.attr = "reset_history",
|
|
},
|
|
};
|
|
|
|
static const struct pmbus_limit_attr vmon_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_VIRT_VMON_UV_WARN_LIMIT,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_VOLTAGE_UV_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VIRT_VMON_UV_FAULT_LIMIT,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_VOLTAGE_UV_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_VMON_OV_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_VOLTAGE_OV_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VIRT_VMON_OV_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_VOLTAGE_OV_FAULT,
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_limit_attr vout_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_VOUT_UV_WARN_LIMIT,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_VOLTAGE_UV_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VOUT_UV_FAULT_LIMIT,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_VOLTAGE_UV_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VOUT_OV_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_VOLTAGE_OV_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VOUT_OV_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_VOLTAGE_OV_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VOUT_AVG,
|
|
.update = true,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VOUT_MIN,
|
|
.update = true,
|
|
.attr = "lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VOUT_MAX,
|
|
.update = true,
|
|
.attr = "highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_VOUT_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_sensor_attr voltage_attributes[] = {
|
|
{
|
|
.reg = PMBUS_READ_VIN,
|
|
.class = PSC_VOLTAGE_IN,
|
|
.label = "vin",
|
|
.func = PMBUS_HAVE_VIN,
|
|
.sfunc = PMBUS_HAVE_STATUS_INPUT,
|
|
.sbase = PB_STATUS_INPUT_BASE,
|
|
.gbit = PB_STATUS_VIN_UV,
|
|
.limit = vin_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(vin_limit_attrs),
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_VMON,
|
|
.class = PSC_VOLTAGE_IN,
|
|
.label = "vmon",
|
|
.func = PMBUS_HAVE_VMON,
|
|
.sfunc = PMBUS_HAVE_STATUS_VMON,
|
|
.sbase = PB_STATUS_VMON_BASE,
|
|
.limit = vmon_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(vmon_limit_attrs),
|
|
}, {
|
|
.reg = PMBUS_READ_VCAP,
|
|
.class = PSC_VOLTAGE_IN,
|
|
.label = "vcap",
|
|
.func = PMBUS_HAVE_VCAP,
|
|
}, {
|
|
.reg = PMBUS_READ_VOUT,
|
|
.class = PSC_VOLTAGE_OUT,
|
|
.label = "vout",
|
|
.paged = true,
|
|
.func = PMBUS_HAVE_VOUT,
|
|
.sfunc = PMBUS_HAVE_STATUS_VOUT,
|
|
.sbase = PB_STATUS_VOUT_BASE,
|
|
.gbit = PB_STATUS_VOUT_OV,
|
|
.limit = vout_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(vout_limit_attrs),
|
|
}
|
|
};
|
|
|
|
/* Current attributes */
|
|
|
|
static const struct pmbus_limit_attr iin_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_IIN_OC_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_IIN_OC_WARNING,
|
|
}, {
|
|
.reg = PMBUS_IIN_OC_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_IIN_OC_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_IIN_AVG,
|
|
.update = true,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_IIN_MIN,
|
|
.update = true,
|
|
.attr = "lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_IIN_MAX,
|
|
.update = true,
|
|
.attr = "highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_IIN_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_limit_attr iout_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_IOUT_OC_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_IOUT_OC_WARNING,
|
|
}, {
|
|
.reg = PMBUS_IOUT_UC_FAULT_LIMIT,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_IOUT_UC_FAULT,
|
|
}, {
|
|
.reg = PMBUS_IOUT_OC_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_IOUT_OC_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_IOUT_AVG,
|
|
.update = true,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_IOUT_MIN,
|
|
.update = true,
|
|
.attr = "lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_IOUT_MAX,
|
|
.update = true,
|
|
.attr = "highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_IOUT_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_sensor_attr current_attributes[] = {
|
|
{
|
|
.reg = PMBUS_READ_IIN,
|
|
.class = PSC_CURRENT_IN,
|
|
.label = "iin",
|
|
.func = PMBUS_HAVE_IIN,
|
|
.sfunc = PMBUS_HAVE_STATUS_INPUT,
|
|
.sbase = PB_STATUS_INPUT_BASE,
|
|
.gbit = PB_STATUS_INPUT,
|
|
.limit = iin_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(iin_limit_attrs),
|
|
}, {
|
|
.reg = PMBUS_READ_IOUT,
|
|
.class = PSC_CURRENT_OUT,
|
|
.label = "iout",
|
|
.paged = true,
|
|
.func = PMBUS_HAVE_IOUT,
|
|
.sfunc = PMBUS_HAVE_STATUS_IOUT,
|
|
.sbase = PB_STATUS_IOUT_BASE,
|
|
.gbit = PB_STATUS_IOUT_OC,
|
|
.limit = iout_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(iout_limit_attrs),
|
|
}
|
|
};
|
|
|
|
/* Power attributes */
|
|
|
|
static const struct pmbus_limit_attr pin_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_PIN_OP_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "alarm",
|
|
.sbit = PB_PIN_OP_WARNING,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_PIN_AVG,
|
|
.update = true,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_PIN_MIN,
|
|
.update = true,
|
|
.attr = "input_lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_PIN_MAX,
|
|
.update = true,
|
|
.attr = "input_highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_PIN_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_limit_attr pout_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_POUT_MAX,
|
|
.attr = "cap",
|
|
.alarm = "cap_alarm",
|
|
.sbit = PB_POWER_LIMITING,
|
|
}, {
|
|
.reg = PMBUS_POUT_OP_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_POUT_OP_WARNING,
|
|
}, {
|
|
.reg = PMBUS_POUT_OP_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_POUT_OP_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_POUT_AVG,
|
|
.update = true,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_POUT_MIN,
|
|
.update = true,
|
|
.attr = "input_lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_POUT_MAX,
|
|
.update = true,
|
|
.attr = "input_highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_POUT_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_sensor_attr power_attributes[] = {
|
|
{
|
|
.reg = PMBUS_READ_PIN,
|
|
.class = PSC_POWER,
|
|
.label = "pin",
|
|
.func = PMBUS_HAVE_PIN,
|
|
.sfunc = PMBUS_HAVE_STATUS_INPUT,
|
|
.sbase = PB_STATUS_INPUT_BASE,
|
|
.gbit = PB_STATUS_INPUT,
|
|
.limit = pin_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(pin_limit_attrs),
|
|
}, {
|
|
.reg = PMBUS_READ_POUT,
|
|
.class = PSC_POWER,
|
|
.label = "pout",
|
|
.paged = true,
|
|
.func = PMBUS_HAVE_POUT,
|
|
.sfunc = PMBUS_HAVE_STATUS_IOUT,
|
|
.sbase = PB_STATUS_IOUT_BASE,
|
|
.limit = pout_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(pout_limit_attrs),
|
|
}
|
|
};
|
|
|
|
/* Temperature atributes */
|
|
|
|
static const struct pmbus_limit_attr temp_limit_attrs[] = {
|
|
{
|
|
.reg = PMBUS_UT_WARN_LIMIT,
|
|
.low = true,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_TEMP_UT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_UT_FAULT_LIMIT,
|
|
.low = true,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_TEMP_UT_FAULT,
|
|
}, {
|
|
.reg = PMBUS_OT_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_TEMP_OT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_OT_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_TEMP_OT_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_TEMP_MIN,
|
|
.attr = "lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_TEMP_AVG,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_TEMP_MAX,
|
|
.attr = "highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_TEMP_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_limit_attr temp_limit_attrs2[] = {
|
|
{
|
|
.reg = PMBUS_UT_WARN_LIMIT,
|
|
.low = true,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_TEMP_UT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_UT_FAULT_LIMIT,
|
|
.low = true,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_TEMP_UT_FAULT,
|
|
}, {
|
|
.reg = PMBUS_OT_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_TEMP_OT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_OT_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_TEMP_OT_FAULT,
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_TEMP2_MIN,
|
|
.attr = "lowest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_TEMP2_AVG,
|
|
.attr = "average",
|
|
}, {
|
|
.reg = PMBUS_VIRT_READ_TEMP2_MAX,
|
|
.attr = "highest",
|
|
}, {
|
|
.reg = PMBUS_VIRT_RESET_TEMP2_HISTORY,
|
|
.attr = "reset_history",
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_limit_attr temp_limit_attrs3[] = {
|
|
{
|
|
.reg = PMBUS_UT_WARN_LIMIT,
|
|
.low = true,
|
|
.attr = "min",
|
|
.alarm = "min_alarm",
|
|
.sbit = PB_TEMP_UT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_UT_FAULT_LIMIT,
|
|
.low = true,
|
|
.attr = "lcrit",
|
|
.alarm = "lcrit_alarm",
|
|
.sbit = PB_TEMP_UT_FAULT,
|
|
}, {
|
|
.reg = PMBUS_OT_WARN_LIMIT,
|
|
.attr = "max",
|
|
.alarm = "max_alarm",
|
|
.sbit = PB_TEMP_OT_WARNING,
|
|
}, {
|
|
.reg = PMBUS_OT_FAULT_LIMIT,
|
|
.attr = "crit",
|
|
.alarm = "crit_alarm",
|
|
.sbit = PB_TEMP_OT_FAULT,
|
|
}
|
|
};
|
|
|
|
static const struct pmbus_sensor_attr temp_attributes[] = {
|
|
{
|
|
.reg = PMBUS_READ_TEMPERATURE_1,
|
|
.class = PSC_TEMPERATURE,
|
|
.paged = true,
|
|
.update = true,
|
|
.compare = true,
|
|
.func = PMBUS_HAVE_TEMP,
|
|
.sfunc = PMBUS_HAVE_STATUS_TEMP,
|
|
.sbase = PB_STATUS_TEMP_BASE,
|
|
.gbit = PB_STATUS_TEMPERATURE,
|
|
.limit = temp_limit_attrs,
|
|
.nlimit = ARRAY_SIZE(temp_limit_attrs),
|
|
}, {
|
|
.reg = PMBUS_READ_TEMPERATURE_2,
|
|
.class = PSC_TEMPERATURE,
|
|
.paged = true,
|
|
.update = true,
|
|
.compare = true,
|
|
.func = PMBUS_HAVE_TEMP2,
|
|
.sfunc = PMBUS_HAVE_STATUS_TEMP,
|
|
.sbase = PB_STATUS_TEMP_BASE,
|
|
.gbit = PB_STATUS_TEMPERATURE,
|
|
.limit = temp_limit_attrs2,
|
|
.nlimit = ARRAY_SIZE(temp_limit_attrs2),
|
|
}, {
|
|
.reg = PMBUS_READ_TEMPERATURE_3,
|
|
.class = PSC_TEMPERATURE,
|
|
.paged = true,
|
|
.update = true,
|
|
.compare = true,
|
|
.func = PMBUS_HAVE_TEMP3,
|
|
.sfunc = PMBUS_HAVE_STATUS_TEMP,
|
|
.sbase = PB_STATUS_TEMP_BASE,
|
|
.gbit = PB_STATUS_TEMPERATURE,
|
|
.limit = temp_limit_attrs3,
|
|
.nlimit = ARRAY_SIZE(temp_limit_attrs3),
|
|
}
|
|
};
|
|
|
|
static const int pmbus_fan_registers[] = {
|
|
PMBUS_READ_FAN_SPEED_1,
|
|
PMBUS_READ_FAN_SPEED_2,
|
|
PMBUS_READ_FAN_SPEED_3,
|
|
PMBUS_READ_FAN_SPEED_4
|
|
};
|
|
|
|
static const int pmbus_fan_status_registers[] = {
|
|
PMBUS_STATUS_FAN_12,
|
|
PMBUS_STATUS_FAN_12,
|
|
PMBUS_STATUS_FAN_34,
|
|
PMBUS_STATUS_FAN_34
|
|
};
|
|
|
|
static const u32 pmbus_fan_flags[] = {
|
|
PMBUS_HAVE_FAN12,
|
|
PMBUS_HAVE_FAN12,
|
|
PMBUS_HAVE_FAN34,
|
|
PMBUS_HAVE_FAN34
|
|
};
|
|
|
|
static const u32 pmbus_fan_status_flags[] = {
|
|
PMBUS_HAVE_STATUS_FAN12,
|
|
PMBUS_HAVE_STATUS_FAN12,
|
|
PMBUS_HAVE_STATUS_FAN34,
|
|
PMBUS_HAVE_STATUS_FAN34
|
|
};
|
|
|
|
/* Fans */
|
|
|
|
/* Precondition: FAN_CONFIG_x_y and FAN_COMMAND_x must exist for the fan ID */
|
|
static int pmbus_add_fan_ctrl(struct i2c_client *client,
|
|
struct pmbus_data *data, int index, int page, int id,
|
|
u8 config)
|
|
{
|
|
struct pmbus_sensor *sensor;
|
|
|
|
sensor = pmbus_add_sensor(data, "fan", "target", index, page,
|
|
0xff, PMBUS_VIRT_FAN_TARGET_1 + id, PSC_FAN,
|
|
false, false, true);
|
|
|
|
if (!sensor)
|
|
return -ENOMEM;
|
|
|
|
if (!((data->info->func[page] & PMBUS_HAVE_PWM12) ||
|
|
(data->info->func[page] & PMBUS_HAVE_PWM34)))
|
|
return 0;
|
|
|
|
sensor = pmbus_add_sensor(data, "pwm", NULL, index, page,
|
|
0xff, PMBUS_VIRT_PWM_1 + id, PSC_PWM,
|
|
false, false, true);
|
|
|
|
if (!sensor)
|
|
return -ENOMEM;
|
|
|
|
sensor = pmbus_add_sensor(data, "pwm", "enable", index, page,
|
|
0xff, PMBUS_VIRT_PWM_ENABLE_1 + id, PSC_PWM,
|
|
true, false, false);
|
|
|
|
if (!sensor)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pmbus_add_fan_attributes(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
const struct pmbus_driver_info *info = data->info;
|
|
int index = 1;
|
|
int page;
|
|
int ret;
|
|
|
|
for (page = 0; page < info->pages; page++) {
|
|
int f;
|
|
|
|
for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) {
|
|
int regval;
|
|
|
|
if (!(info->func[page] & pmbus_fan_flags[f]))
|
|
break;
|
|
|
|
if (!pmbus_check_word_register(client, page,
|
|
pmbus_fan_registers[f]))
|
|
break;
|
|
|
|
/*
|
|
* Skip fan if not installed.
|
|
* Each fan configuration register covers multiple fans,
|
|
* so we have to do some magic.
|
|
*/
|
|
regval = _pmbus_read_byte_data(client, page,
|
|
pmbus_fan_config_registers[f]);
|
|
if (regval < 0 ||
|
|
(!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4)))))
|
|
continue;
|
|
|
|
if (pmbus_add_sensor(data, "fan", "input", index,
|
|
page, 0xff, pmbus_fan_registers[f],
|
|
PSC_FAN, true, true, true) == NULL)
|
|
return -ENOMEM;
|
|
|
|
/* Fan control */
|
|
if (pmbus_check_word_register(client, page,
|
|
pmbus_fan_command_registers[f])) {
|
|
ret = pmbus_add_fan_ctrl(client, data, index,
|
|
page, f, regval);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Each fan status register covers multiple fans,
|
|
* so we have to do some magic.
|
|
*/
|
|
if ((info->func[page] & pmbus_fan_status_flags[f]) &&
|
|
pmbus_check_byte_register(client,
|
|
page, pmbus_fan_status_registers[f])) {
|
|
int base;
|
|
|
|
if (f > 1) /* fan 3, 4 */
|
|
base = PB_STATUS_FAN34_BASE + page;
|
|
else
|
|
base = PB_STATUS_FAN_BASE + page;
|
|
ret = pmbus_add_boolean(data, "fan",
|
|
"alarm", index, NULL, NULL, base,
|
|
PB_FAN_FAN1_WARNING >> (f & 1));
|
|
if (ret)
|
|
return ret;
|
|
ret = pmbus_add_boolean(data, "fan",
|
|
"fault", index, NULL, NULL, base,
|
|
PB_FAN_FAN1_FAULT >> (f & 1));
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
index++;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct pmbus_samples_attr {
|
|
int reg;
|
|
char *name;
|
|
};
|
|
|
|
struct pmbus_samples_reg {
|
|
int page;
|
|
struct pmbus_samples_attr *attr;
|
|
struct device_attribute dev_attr;
|
|
};
|
|
|
|
static struct pmbus_samples_attr pmbus_samples_registers[] = {
|
|
{
|
|
.reg = PMBUS_VIRT_SAMPLES,
|
|
.name = "samples",
|
|
}, {
|
|
.reg = PMBUS_VIRT_IN_SAMPLES,
|
|
.name = "in_samples",
|
|
}, {
|
|
.reg = PMBUS_VIRT_CURR_SAMPLES,
|
|
.name = "curr_samples",
|
|
}, {
|
|
.reg = PMBUS_VIRT_POWER_SAMPLES,
|
|
.name = "power_samples",
|
|
}, {
|
|
.reg = PMBUS_VIRT_TEMP_SAMPLES,
|
|
.name = "temp_samples",
|
|
}
|
|
};
|
|
|
|
#define to_samples_reg(x) container_of(x, struct pmbus_samples_reg, dev_attr)
|
|
|
|
static ssize_t pmbus_show_samples(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
int val;
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
struct pmbus_samples_reg *reg = to_samples_reg(devattr);
|
|
|
|
val = _pmbus_read_word_data(client, reg->page, 0xff, reg->attr->reg);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t pmbus_set_samples(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int ret;
|
|
long val;
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
struct pmbus_samples_reg *reg = to_samples_reg(devattr);
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
|
|
if (kstrtol(buf, 0, &val) < 0)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
ret = _pmbus_write_word_data(client, reg->page, reg->attr->reg, val);
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return ret ? : count;
|
|
}
|
|
|
|
static int pmbus_add_samples_attr(struct pmbus_data *data, int page,
|
|
struct pmbus_samples_attr *attr)
|
|
{
|
|
struct pmbus_samples_reg *reg;
|
|
|
|
reg = devm_kzalloc(data->dev, sizeof(*reg), GFP_KERNEL);
|
|
if (!reg)
|
|
return -ENOMEM;
|
|
|
|
reg->attr = attr;
|
|
reg->page = page;
|
|
|
|
pmbus_dev_attr_init(®->dev_attr, attr->name, 0644,
|
|
pmbus_show_samples, pmbus_set_samples);
|
|
|
|
return pmbus_add_attribute(data, ®->dev_attr.attr);
|
|
}
|
|
|
|
static int pmbus_add_samples_attributes(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
const struct pmbus_driver_info *info = data->info;
|
|
int s;
|
|
|
|
if (!(info->func[0] & PMBUS_HAVE_SAMPLES))
|
|
return 0;
|
|
|
|
for (s = 0; s < ARRAY_SIZE(pmbus_samples_registers); s++) {
|
|
struct pmbus_samples_attr *attr;
|
|
int ret;
|
|
|
|
attr = &pmbus_samples_registers[s];
|
|
if (!pmbus_check_word_register(client, 0, attr->reg))
|
|
continue;
|
|
|
|
ret = pmbus_add_samples_attr(data, 0, attr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pmbus_find_attributes(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
int ret;
|
|
|
|
/* Voltage sensors */
|
|
ret = pmbus_add_sensor_attrs(client, data, "in", voltage_attributes,
|
|
ARRAY_SIZE(voltage_attributes));
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Current sensors */
|
|
ret = pmbus_add_sensor_attrs(client, data, "curr", current_attributes,
|
|
ARRAY_SIZE(current_attributes));
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Power sensors */
|
|
ret = pmbus_add_sensor_attrs(client, data, "power", power_attributes,
|
|
ARRAY_SIZE(power_attributes));
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Temperature sensors */
|
|
ret = pmbus_add_sensor_attrs(client, data, "temp", temp_attributes,
|
|
ARRAY_SIZE(temp_attributes));
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Fans */
|
|
ret = pmbus_add_fan_attributes(client, data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = pmbus_add_samples_attributes(client, data);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Identify chip parameters.
|
|
* This function is called for all chips.
|
|
*/
|
|
static int pmbus_identify_common(struct i2c_client *client,
|
|
struct pmbus_data *data, int page)
|
|
{
|
|
int vout_mode = -1;
|
|
|
|
if (pmbus_check_byte_register(client, page, PMBUS_VOUT_MODE))
|
|
vout_mode = _pmbus_read_byte_data(client, page,
|
|
PMBUS_VOUT_MODE);
|
|
if (vout_mode >= 0 && vout_mode != 0xff) {
|
|
/*
|
|
* Not all chips support the VOUT_MODE command,
|
|
* so a failure to read it is not an error.
|
|
*/
|
|
switch (vout_mode >> 5) {
|
|
case 0: /* linear mode */
|
|
if (data->info->format[PSC_VOLTAGE_OUT] != linear)
|
|
return -ENODEV;
|
|
|
|
data->exponent[page] = ((s8)(vout_mode << 3)) >> 3;
|
|
break;
|
|
case 1: /* VID mode */
|
|
if (data->info->format[PSC_VOLTAGE_OUT] != vid)
|
|
return -ENODEV;
|
|
break;
|
|
case 2: /* direct mode */
|
|
if (data->info->format[PSC_VOLTAGE_OUT] != direct)
|
|
return -ENODEV;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
pmbus_clear_fault_page(client, page);
|
|
return 0;
|
|
}
|
|
|
|
static int pmbus_read_status_byte(struct i2c_client *client, int page)
|
|
{
|
|
return _pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE);
|
|
}
|
|
|
|
static int pmbus_read_status_word(struct i2c_client *client, int page)
|
|
{
|
|
return _pmbus_read_word_data(client, page, 0xff, PMBUS_STATUS_WORD);
|
|
}
|
|
|
|
static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
|
|
struct pmbus_driver_info *info)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
int page, ret;
|
|
|
|
/*
|
|
* Some PMBus chips don't support PMBUS_STATUS_WORD, so try
|
|
* to use PMBUS_STATUS_BYTE instead if that is the case.
|
|
* Bail out if both registers are not supported.
|
|
*/
|
|
data->read_status = pmbus_read_status_word;
|
|
ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD);
|
|
if (ret < 0 || ret == 0xffff) {
|
|
data->read_status = pmbus_read_status_byte;
|
|
ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE);
|
|
if (ret < 0 || ret == 0xff) {
|
|
dev_err(dev, "PMBus status register not found\n");
|
|
return -ENODEV;
|
|
}
|
|
} else {
|
|
data->has_status_word = true;
|
|
}
|
|
|
|
/* Enable PEC if the controller supports it */
|
|
ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY);
|
|
if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK))
|
|
client->flags |= I2C_CLIENT_PEC;
|
|
|
|
/*
|
|
* Check if the chip is write protected. If it is, we can not clear
|
|
* faults, and we should not try it. Also, in that case, writes into
|
|
* limit registers need to be disabled.
|
|
*/
|
|
ret = i2c_smbus_read_byte_data(client, PMBUS_WRITE_PROTECT);
|
|
if (ret > 0 && (ret & PB_WP_ANY))
|
|
data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK;
|
|
|
|
if (data->info->pages)
|
|
pmbus_clear_faults(client);
|
|
else
|
|
pmbus_clear_fault_page(client, -1);
|
|
|
|
if (info->identify) {
|
|
ret = (*info->identify)(client, info);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Chip identification failed\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
|
|
dev_err(dev, "Bad number of PMBus pages: %d\n", info->pages);
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (page = 0; page < info->pages; page++) {
|
|
ret = pmbus_identify_common(client, data, page);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Failed to identify chip capabilities\n");
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_REGULATOR)
|
|
static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct device *dev = rdev_get_dev(rdev);
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
u8 page = rdev_get_id(rdev);
|
|
int ret;
|
|
|
|
ret = pmbus_read_byte_data(client, page, PMBUS_OPERATION);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return !!(ret & PB_OPERATION_CONTROL_ON);
|
|
}
|
|
|
|
static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
|
|
{
|
|
struct device *dev = rdev_get_dev(rdev);
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
u8 page = rdev_get_id(rdev);
|
|
|
|
return pmbus_update_byte_data(client, page, PMBUS_OPERATION,
|
|
PB_OPERATION_CONTROL_ON,
|
|
enable ? PB_OPERATION_CONTROL_ON : 0);
|
|
}
|
|
|
|
static int pmbus_regulator_enable(struct regulator_dev *rdev)
|
|
{
|
|
return _pmbus_regulator_on_off(rdev, 1);
|
|
}
|
|
|
|
static int pmbus_regulator_disable(struct regulator_dev *rdev)
|
|
{
|
|
return _pmbus_regulator_on_off(rdev, 0);
|
|
}
|
|
|
|
const struct regulator_ops pmbus_regulator_ops = {
|
|
.enable = pmbus_regulator_enable,
|
|
.disable = pmbus_regulator_disable,
|
|
.is_enabled = pmbus_regulator_is_enabled,
|
|
};
|
|
EXPORT_SYMBOL_GPL(pmbus_regulator_ops);
|
|
|
|
static int pmbus_regulator_register(struct pmbus_data *data)
|
|
{
|
|
struct device *dev = data->dev;
|
|
const struct pmbus_driver_info *info = data->info;
|
|
const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
|
|
struct regulator_dev *rdev;
|
|
int i;
|
|
|
|
for (i = 0; i < info->num_regulators; i++) {
|
|
struct regulator_config config = { };
|
|
|
|
config.dev = dev;
|
|
config.driver_data = data;
|
|
|
|
if (pdata && pdata->reg_init_data)
|
|
config.init_data = &pdata->reg_init_data[i];
|
|
|
|
rdev = devm_regulator_register(dev, &info->reg_desc[i],
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(dev, "Failed to register %s regulator\n",
|
|
info->reg_desc[i].name);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int pmbus_regulator_register(struct pmbus_data *data)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct dentry *pmbus_debugfs_dir; /* pmbus debugfs directory */
|
|
|
|
#if IS_ENABLED(CONFIG_DEBUG_FS)
|
|
static int pmbus_debugfs_get(void *data, u64 *val)
|
|
{
|
|
int rc;
|
|
struct pmbus_debugfs_entry *entry = data;
|
|
|
|
rc = _pmbus_read_byte_data(entry->client, entry->page, entry->reg);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
*val = rc;
|
|
|
|
return 0;
|
|
}
|
|
DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops, pmbus_debugfs_get, NULL,
|
|
"0x%02llx\n");
|
|
|
|
static int pmbus_debugfs_get_status(void *data, u64 *val)
|
|
{
|
|
int rc;
|
|
struct pmbus_debugfs_entry *entry = data;
|
|
struct pmbus_data *pdata = i2c_get_clientdata(entry->client);
|
|
|
|
rc = pdata->read_status(entry->client, entry->page);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
*val = rc;
|
|
|
|
return 0;
|
|
}
|
|
DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status,
|
|
NULL, "0x%04llx\n");
|
|
|
|
static int pmbus_init_debugfs(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
int i, idx = 0;
|
|
char name[PMBUS_NAME_SIZE];
|
|
struct pmbus_debugfs_entry *entries;
|
|
|
|
if (!pmbus_debugfs_dir)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Create the debugfs directory for this device. Use the hwmon device
|
|
* name to avoid conflicts (hwmon numbers are globally unique).
|
|
*/
|
|
data->debugfs = debugfs_create_dir(dev_name(data->hwmon_dev),
|
|
pmbus_debugfs_dir);
|
|
if (IS_ERR_OR_NULL(data->debugfs)) {
|
|
data->debugfs = NULL;
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Allocate the max possible entries we need. */
|
|
entries = devm_kcalloc(data->dev,
|
|
data->info->pages * 10, sizeof(*entries),
|
|
GFP_KERNEL);
|
|
if (!entries)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < data->info->pages; ++i) {
|
|
/* Check accessibility of status register if it's not page 0 */
|
|
if (!i || pmbus_check_status_register(client, i)) {
|
|
/* No need to set reg as we have special read op. */
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops_status);
|
|
}
|
|
|
|
if (data->info->func[i] & PMBUS_HAVE_STATUS_VOUT) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_VOUT;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_vout", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (data->info->func[i] & PMBUS_HAVE_STATUS_IOUT) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_IOUT;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_iout", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (data->info->func[i] & PMBUS_HAVE_STATUS_INPUT) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_INPUT;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_input", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (data->info->func[i] & PMBUS_HAVE_STATUS_TEMP) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_TEMPERATURE;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_temp", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (pmbus_check_byte_register(client, i, PMBUS_STATUS_CML)) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_CML;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_cml", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (pmbus_check_byte_register(client, i, PMBUS_STATUS_OTHER)) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_OTHER;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_other", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (pmbus_check_byte_register(client, i,
|
|
PMBUS_STATUS_MFR_SPECIFIC)) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_MFR_SPECIFIC;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_mfr", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN12) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_FAN_12;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan12", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
|
|
if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN34) {
|
|
entries[idx].client = client;
|
|
entries[idx].page = i;
|
|
entries[idx].reg = PMBUS_STATUS_FAN_34;
|
|
scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan34", i);
|
|
debugfs_create_file(name, 0444, data->debugfs,
|
|
&entries[idx++],
|
|
&pmbus_debugfs_ops);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int pmbus_init_debugfs(struct i2c_client *client,
|
|
struct pmbus_data *data)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */
|
|
|
|
int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
|
|
struct pmbus_driver_info *info)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
|
|
struct pmbus_data *data;
|
|
size_t groups_num = 0;
|
|
int ret;
|
|
|
|
if (!info)
|
|
return -ENODEV;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE
|
|
| I2C_FUNC_SMBUS_BYTE_DATA
|
|
| I2C_FUNC_SMBUS_WORD_DATA))
|
|
return -ENODEV;
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
if (info->groups)
|
|
while (info->groups[groups_num])
|
|
groups_num++;
|
|
|
|
data->groups = devm_kcalloc(dev, groups_num + 2, sizeof(void *),
|
|
GFP_KERNEL);
|
|
if (!data->groups)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
data->dev = dev;
|
|
|
|
if (pdata)
|
|
data->flags = pdata->flags;
|
|
data->info = info;
|
|
data->currpage = -1;
|
|
data->currphase = -1;
|
|
|
|
ret = pmbus_init_common(client, data, info);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = pmbus_find_attributes(client, data);
|
|
if (ret)
|
|
goto out_kfree;
|
|
|
|
/*
|
|
* If there are no attributes, something is wrong.
|
|
* Bail out instead of trying to register nothing.
|
|
*/
|
|
if (!data->num_attributes) {
|
|
dev_err(dev, "No attributes found\n");
|
|
ret = -ENODEV;
|
|
goto out_kfree;
|
|
}
|
|
|
|
data->groups[0] = &data->group;
|
|
memcpy(data->groups + 1, info->groups, sizeof(void *) * groups_num);
|
|
data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
|
|
data, data->groups);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
ret = PTR_ERR(data->hwmon_dev);
|
|
dev_err(dev, "Failed to register hwmon device\n");
|
|
goto out_kfree;
|
|
}
|
|
|
|
ret = pmbus_regulator_register(data);
|
|
if (ret)
|
|
goto out_unregister;
|
|
|
|
ret = pmbus_init_debugfs(client, data);
|
|
if (ret)
|
|
dev_warn(dev, "Failed to register debugfs\n");
|
|
|
|
return 0;
|
|
|
|
out_unregister:
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
out_kfree:
|
|
kfree(data->group.attrs);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_do_probe);
|
|
|
|
int pmbus_do_remove(struct i2c_client *client)
|
|
{
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
|
|
debugfs_remove_recursive(data->debugfs);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
kfree(data->group.attrs);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_do_remove);
|
|
|
|
struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client)
|
|
{
|
|
struct pmbus_data *data = i2c_get_clientdata(client);
|
|
|
|
return data->debugfs;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmbus_get_debugfs_dir);
|
|
|
|
static int __init pmbus_core_init(void)
|
|
{
|
|
pmbus_debugfs_dir = debugfs_create_dir("pmbus", NULL);
|
|
if (IS_ERR(pmbus_debugfs_dir))
|
|
pmbus_debugfs_dir = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit pmbus_core_exit(void)
|
|
{
|
|
debugfs_remove_recursive(pmbus_debugfs_dir);
|
|
}
|
|
|
|
module_init(pmbus_core_init);
|
|
module_exit(pmbus_core_exit);
|
|
|
|
MODULE_AUTHOR("Guenter Roeck");
|
|
MODULE_DESCRIPTION("PMBus core driver");
|
|
MODULE_LICENSE("GPL");
|