mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
2a844c148e
SENSORS_LIMIT and the generic clamp_val have the same functionality, and clamp_val is more efficient. This patch reduces text size by 9052 bytes and bss size by 11624 bytes for x86_64 builds. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: George Joseph <george.joseph@fairview5.com> Acked-by: Jean Delvare <khali@linux-fr.org>
647 lines
19 KiB
C
647 lines
19 KiB
C
/*
|
|
* max6639.c - Support for Maxim MAX6639
|
|
*
|
|
* 2-Channel Temperature Monitor with Dual PWM Fan-Speed Controller
|
|
*
|
|
* Copyright (C) 2010, 2011 Roland Stigge <stigge@antcom.de>
|
|
*
|
|
* based on the initial MAX6639 support from semptian.net
|
|
* by He Changqing <hechangqing@semptian.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/i2c/max6639.h>
|
|
|
|
/* Addresses to scan */
|
|
static unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END };
|
|
|
|
/* The MAX6639 registers, valid channel numbers: 0, 1 */
|
|
#define MAX6639_REG_TEMP(ch) (0x00 + (ch))
|
|
#define MAX6639_REG_STATUS 0x02
|
|
#define MAX6639_REG_OUTPUT_MASK 0x03
|
|
#define MAX6639_REG_GCONFIG 0x04
|
|
#define MAX6639_REG_TEMP_EXT(ch) (0x05 + (ch))
|
|
#define MAX6639_REG_ALERT_LIMIT(ch) (0x08 + (ch))
|
|
#define MAX6639_REG_OT_LIMIT(ch) (0x0A + (ch))
|
|
#define MAX6639_REG_THERM_LIMIT(ch) (0x0C + (ch))
|
|
#define MAX6639_REG_FAN_CONFIG1(ch) (0x10 + (ch) * 4)
|
|
#define MAX6639_REG_FAN_CONFIG2a(ch) (0x11 + (ch) * 4)
|
|
#define MAX6639_REG_FAN_CONFIG2b(ch) (0x12 + (ch) * 4)
|
|
#define MAX6639_REG_FAN_CONFIG3(ch) (0x13 + (ch) * 4)
|
|
#define MAX6639_REG_FAN_CNT(ch) (0x20 + (ch))
|
|
#define MAX6639_REG_TARGET_CNT(ch) (0x22 + (ch))
|
|
#define MAX6639_REG_FAN_PPR(ch) (0x24 + (ch))
|
|
#define MAX6639_REG_TARGTDUTY(ch) (0x26 + (ch))
|
|
#define MAX6639_REG_FAN_START_TEMP(ch) (0x28 + (ch))
|
|
#define MAX6639_REG_DEVID 0x3D
|
|
#define MAX6639_REG_MANUID 0x3E
|
|
#define MAX6639_REG_DEVREV 0x3F
|
|
|
|
/* Register bits */
|
|
#define MAX6639_GCONFIG_STANDBY 0x80
|
|
#define MAX6639_GCONFIG_POR 0x40
|
|
#define MAX6639_GCONFIG_DISABLE_TIMEOUT 0x20
|
|
#define MAX6639_GCONFIG_CH2_LOCAL 0x10
|
|
#define MAX6639_GCONFIG_PWM_FREQ_HI 0x08
|
|
|
|
#define MAX6639_FAN_CONFIG1_PWM 0x80
|
|
|
|
#define MAX6639_FAN_CONFIG3_THERM_FULL_SPEED 0x40
|
|
|
|
static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
|
|
|
|
#define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \
|
|
0 : (rpm_ranges[rpm_range] * 30) / (val))
|
|
#define TEMP_LIMIT_TO_REG(val) clamp_val((val) / 1000, 0, 255)
|
|
|
|
/*
|
|
* Client data (each client gets its own)
|
|
*/
|
|
struct max6639_data {
|
|
struct device *hwmon_dev;
|
|
struct mutex update_lock;
|
|
char valid; /* !=0 if following fields are valid */
|
|
unsigned long last_updated; /* In jiffies */
|
|
|
|
/* Register values sampled regularly */
|
|
u16 temp[2]; /* Temperature, in 1/8 C, 0..255 C */
|
|
bool temp_fault[2]; /* Detected temperature diode failure */
|
|
u8 fan[2]; /* Register value: TACH count for fans >=30 */
|
|
u8 status; /* Detected channel alarms and fan failures */
|
|
|
|
/* Register values only written to */
|
|
u8 pwm[2]; /* Register value: Duty cycle 0..120 */
|
|
u8 temp_therm[2]; /* THERM Temperature, 0..255 C (->_max) */
|
|
u8 temp_alert[2]; /* ALERT Temperature, 0..255 C (->_crit) */
|
|
u8 temp_ot[2]; /* OT Temperature, 0..255 C (->_emergency) */
|
|
|
|
/* Register values initialized only once */
|
|
u8 ppr; /* Pulses per rotation 0..3 for 1..4 ppr */
|
|
u8 rpm_range; /* Index in above rpm_ranges table */
|
|
};
|
|
|
|
static struct max6639_data *max6639_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct max6639_data *ret = data;
|
|
int i;
|
|
int status_reg;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
|
|
int res;
|
|
|
|
dev_dbg(&client->dev, "Starting max6639 update\n");
|
|
|
|
status_reg = i2c_smbus_read_byte_data(client,
|
|
MAX6639_REG_STATUS);
|
|
if (status_reg < 0) {
|
|
ret = ERR_PTR(status_reg);
|
|
goto abort;
|
|
}
|
|
|
|
data->status = status_reg;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
res = i2c_smbus_read_byte_data(client,
|
|
MAX6639_REG_FAN_CNT(i));
|
|
if (res < 0) {
|
|
ret = ERR_PTR(res);
|
|
goto abort;
|
|
}
|
|
data->fan[i] = res;
|
|
|
|
res = i2c_smbus_read_byte_data(client,
|
|
MAX6639_REG_TEMP_EXT(i));
|
|
if (res < 0) {
|
|
ret = ERR_PTR(res);
|
|
goto abort;
|
|
}
|
|
data->temp[i] = res >> 5;
|
|
data->temp_fault[i] = res & 0x01;
|
|
|
|
res = i2c_smbus_read_byte_data(client,
|
|
MAX6639_REG_TEMP(i));
|
|
if (res < 0) {
|
|
ret = ERR_PTR(res);
|
|
goto abort;
|
|
}
|
|
data->temp[i] |= res << 3;
|
|
}
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
abort:
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t show_temp_input(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
long temp;
|
|
struct max6639_data *data = max6639_update_device(dev);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
temp = data->temp[attr->index] * 125;
|
|
return sprintf(buf, "%ld\n", temp);
|
|
}
|
|
|
|
static ssize_t show_temp_fault(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
struct max6639_data *data = max6639_update_device(dev);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", data->temp_fault[attr->index]);
|
|
}
|
|
|
|
static ssize_t show_temp_max(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
return sprintf(buf, "%d\n", (data->temp_therm[attr->index] * 1000));
|
|
}
|
|
|
|
static ssize_t set_temp_max(struct device *dev,
|
|
struct device_attribute *dev_attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
unsigned long val;
|
|
int res;
|
|
|
|
res = kstrtoul(buf, 10, &val);
|
|
if (res)
|
|
return res;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->temp_therm[attr->index] = TEMP_LIMIT_TO_REG(val);
|
|
i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_THERM_LIMIT(attr->index),
|
|
data->temp_therm[attr->index]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_temp_crit(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
return sprintf(buf, "%d\n", (data->temp_alert[attr->index] * 1000));
|
|
}
|
|
|
|
static ssize_t set_temp_crit(struct device *dev,
|
|
struct device_attribute *dev_attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
unsigned long val;
|
|
int res;
|
|
|
|
res = kstrtoul(buf, 10, &val);
|
|
if (res)
|
|
return res;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->temp_alert[attr->index] = TEMP_LIMIT_TO_REG(val);
|
|
i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_ALERT_LIMIT(attr->index),
|
|
data->temp_alert[attr->index]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_temp_emergency(struct device *dev,
|
|
struct device_attribute *dev_attr,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
return sprintf(buf, "%d\n", (data->temp_ot[attr->index] * 1000));
|
|
}
|
|
|
|
static ssize_t set_temp_emergency(struct device *dev,
|
|
struct device_attribute *dev_attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
unsigned long val;
|
|
int res;
|
|
|
|
res = kstrtoul(buf, 10, &val);
|
|
if (res)
|
|
return res;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->temp_ot[attr->index] = TEMP_LIMIT_TO_REG(val);
|
|
i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_OT_LIMIT(attr->index),
|
|
data->temp_ot[attr->index]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_pwm(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120);
|
|
}
|
|
|
|
static ssize_t set_pwm(struct device *dev,
|
|
struct device_attribute *dev_attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
unsigned long val;
|
|
int res;
|
|
|
|
res = kstrtoul(buf, 10, &val);
|
|
if (res)
|
|
return res;
|
|
|
|
val = clamp_val(val, 0, 255);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->pwm[attr->index] = (u8)(val * 120 / 255);
|
|
i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_TARGTDUTY(attr->index),
|
|
data->pwm[attr->index]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_fan_input(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
struct max6639_data *data = max6639_update_device(dev);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
|
|
data->rpm_range));
|
|
}
|
|
|
|
static ssize_t show_alarm(struct device *dev,
|
|
struct device_attribute *dev_attr, char *buf)
|
|
{
|
|
struct max6639_data *data = max6639_update_device(dev);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", !!(data->status & (1 << attr->index)));
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
|
|
set_temp_max, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
|
|
set_temp_max, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_crit,
|
|
set_temp_crit, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit,
|
|
set_temp_crit, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO,
|
|
show_temp_emergency, set_temp_emergency, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO,
|
|
show_temp_emergency, set_temp_emergency, 1);
|
|
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
|
|
static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
|
|
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_alarm, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_alarm, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 4);
|
|
|
|
|
|
static struct attribute *max6639_attributes[] = {
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_emergency.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_emergency.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1.dev_attr.attr,
|
|
&sensor_dev_attr_pwm2.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_fault.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group max6639_group = {
|
|
.attrs = max6639_attributes,
|
|
};
|
|
|
|
/*
|
|
* returns respective index in rpm_ranges table
|
|
* 1 by default on invalid range
|
|
*/
|
|
static int rpm_range_to_reg(int range)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rpm_ranges); i++) {
|
|
if (rpm_ranges[i] == range)
|
|
return i;
|
|
}
|
|
|
|
return 1; /* default: 4000 RPM */
|
|
}
|
|
|
|
static int max6639_init_client(struct i2c_client *client)
|
|
{
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
struct max6639_platform_data *max6639_info =
|
|
client->dev.platform_data;
|
|
int i;
|
|
int rpm_range = 1; /* default: 4000 RPM */
|
|
int err;
|
|
|
|
/* Reset chip to default values, see below for GCONFIG setup */
|
|
err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG,
|
|
MAX6639_GCONFIG_POR);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* Fans pulse per revolution is 2 by default */
|
|
if (max6639_info && max6639_info->ppr > 0 &&
|
|
max6639_info->ppr < 5)
|
|
data->ppr = max6639_info->ppr;
|
|
else
|
|
data->ppr = 2;
|
|
data->ppr -= 1;
|
|
|
|
if (max6639_info)
|
|
rpm_range = rpm_range_to_reg(max6639_info->rpm_range);
|
|
data->rpm_range = rpm_range;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
/* Set Fan pulse per revolution */
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_FAN_PPR(i),
|
|
data->ppr << 6);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* Fans config PWM, RPM */
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_FAN_CONFIG1(i),
|
|
MAX6639_FAN_CONFIG1_PWM | rpm_range);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* Fans PWM polarity high by default */
|
|
if (max6639_info && max6639_info->pwm_polarity == 0)
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_FAN_CONFIG2a(i), 0x00);
|
|
else
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_FAN_CONFIG2a(i), 0x02);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/*
|
|
* /THERM full speed enable,
|
|
* PWM frequency 25kHz, see also GCONFIG below
|
|
*/
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_FAN_CONFIG3(i),
|
|
MAX6639_FAN_CONFIG3_THERM_FULL_SPEED | 0x03);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* Max. temp. 80C/90C/100C */
|
|
data->temp_therm[i] = 80;
|
|
data->temp_alert[i] = 90;
|
|
data->temp_ot[i] = 100;
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_THERM_LIMIT(i),
|
|
data->temp_therm[i]);
|
|
if (err)
|
|
goto exit;
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_ALERT_LIMIT(i),
|
|
data->temp_alert[i]);
|
|
if (err)
|
|
goto exit;
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_OT_LIMIT(i), data->temp_ot[i]);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* PWM 120/120 (i.e. 100%) */
|
|
data->pwm[i] = 120;
|
|
err = i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_TARGTDUTY(i), data->pwm[i]);
|
|
if (err)
|
|
goto exit;
|
|
}
|
|
/* Start monitoring */
|
|
err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG,
|
|
MAX6639_GCONFIG_DISABLE_TIMEOUT | MAX6639_GCONFIG_CH2_LOCAL |
|
|
MAX6639_GCONFIG_PWM_FREQ_HI);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int max6639_detect(struct i2c_client *client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
int dev_id, manu_id;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Actual detection via device and manufacturer ID */
|
|
dev_id = i2c_smbus_read_byte_data(client, MAX6639_REG_DEVID);
|
|
manu_id = i2c_smbus_read_byte_data(client, MAX6639_REG_MANUID);
|
|
if (dev_id != 0x58 || manu_id != 0x4D)
|
|
return -ENODEV;
|
|
|
|
strlcpy(info->type, "max6639", I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max6639_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct max6639_data *data;
|
|
int err;
|
|
|
|
data = devm_kzalloc(&client->dev, sizeof(struct max6639_data),
|
|
GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Initialize the max6639 chip */
|
|
err = max6639_init_client(client);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* Register sysfs hooks */
|
|
err = sysfs_create_group(&client->dev.kobj, &max6639_group);
|
|
if (err)
|
|
return err;
|
|
|
|
data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto error_remove;
|
|
}
|
|
|
|
dev_info(&client->dev, "temperature sensor and fan control found\n");
|
|
|
|
return 0;
|
|
|
|
error_remove:
|
|
sysfs_remove_group(&client->dev.kobj, &max6639_group);
|
|
return err;
|
|
}
|
|
|
|
static int max6639_remove(struct i2c_client *client)
|
|
{
|
|
struct max6639_data *data = i2c_get_clientdata(client);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &max6639_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int max6639_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int data = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG);
|
|
if (data < 0)
|
|
return data;
|
|
|
|
return i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_GCONFIG, data | MAX6639_GCONFIG_STANDBY);
|
|
}
|
|
|
|
static int max6639_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int data = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG);
|
|
if (data < 0)
|
|
return data;
|
|
|
|
return i2c_smbus_write_byte_data(client,
|
|
MAX6639_REG_GCONFIG, data & ~MAX6639_GCONFIG_STANDBY);
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static const struct i2c_device_id max6639_id[] = {
|
|
{"max6639", 0},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, max6639_id);
|
|
|
|
static const struct dev_pm_ops max6639_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(max6639_suspend, max6639_resume)
|
|
};
|
|
|
|
static struct i2c_driver max6639_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "max6639",
|
|
.pm = &max6639_pm_ops,
|
|
},
|
|
.probe = max6639_probe,
|
|
.remove = max6639_remove,
|
|
.id_table = max6639_id,
|
|
.detect = max6639_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(max6639_driver);
|
|
|
|
MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
|
|
MODULE_DESCRIPTION("max6639 driver");
|
|
MODULE_LICENSE("GPL");
|