mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-25 13:14:07 +08:00
hwmon: Add W83773G driver
Nuvoton W83773G is a hardware monitor IC providing one local temperature and two remote temperature sensors. Signed-off-by: Lei YU <mine260309@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Lei YU
Guenter Roeck
parent
30a7acd573
commit
ee249f2715
@ -1725,6 +1725,16 @@ config SENSORS_VT8231
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called vt8231.
|
||||
|
||||
config SENSORS_W83773G
|
||||
tristate "Nuvoton W83773G"
|
||||
depends on I2C
|
||||
help
|
||||
If you say yes here you get support for the Nuvoton W83773G hardware
|
||||
monitoring chip.
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called w83773g.
|
||||
|
||||
config SENSORS_W83781D
|
||||
tristate "Winbond W83781D, W83782D, W83783S, Asus AS99127F"
|
||||
depends on I2C
|
||||
|
||||
@ -14,6 +14,7 @@ obj-$(CONFIG_SENSORS_ATK0110) += asus_atk0110.o
|
||||
# asb100, then w83781d go first, as they can override other drivers' addresses.
|
||||
obj-$(CONFIG_SENSORS_ASB100) += asb100.o
|
||||
obj-$(CONFIG_SENSORS_W83627HF) += w83627hf.o
|
||||
obj-$(CONFIG_SENSORS_W83773G) += w83773g.o
|
||||
obj-$(CONFIG_SENSORS_W83792D) += w83792d.o
|
||||
obj-$(CONFIG_SENSORS_W83793) += w83793.o
|
||||
obj-$(CONFIG_SENSORS_W83795) += w83795.o
|
||||
|
||||
329
drivers/hwmon/w83773g.c
Normal file
329
drivers/hwmon/w83773g.c
Normal file
@ -0,0 +1,329 @@
|
||||
/*
|
||||
* Copyright (C) 2017 IBM Corp.
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* Driver for the Nuvoton W83773G SMBus temperature sensor IC.
|
||||
* Supported models: W83773G
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/hwmon.h>
|
||||
#include <linux/hwmon-sysfs.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
/* W83773 has 3 channels */
|
||||
#define W83773_CHANNELS 3
|
||||
|
||||
/* The W83773 registers */
|
||||
#define W83773_CONVERSION_RATE_REG_READ 0x04
|
||||
#define W83773_CONVERSION_RATE_REG_WRITE 0x0A
|
||||
#define W83773_MANUFACTURER_ID_REG 0xFE
|
||||
#define W83773_LOCAL_TEMP 0x00
|
||||
|
||||
static const u8 W83773_STATUS[2] = { 0x02, 0x17 };
|
||||
|
||||
static const u8 W83773_TEMP_LSB[2] = { 0x10, 0x25 };
|
||||
static const u8 W83773_TEMP_MSB[2] = { 0x01, 0x24 };
|
||||
|
||||
static const u8 W83773_OFFSET_LSB[2] = { 0x12, 0x16 };
|
||||
static const u8 W83773_OFFSET_MSB[2] = { 0x11, 0x15 };
|
||||
|
||||
/* this is the number of sensors in the device */
|
||||
static const struct i2c_device_id w83773_id[] = {
|
||||
{ "w83773g" },
|
||||
{ }
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(i2c, w83773_id);
|
||||
|
||||
static const struct of_device_id w83773_of_match[] = {
|
||||
{
|
||||
.compatible = "nuvoton,w83773g"
|
||||
},
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, w83773_of_match);
|
||||
|
||||
static inline long temp_of_local(s8 reg)
|
||||
{
|
||||
return reg * 1000;
|
||||
}
|
||||
|
||||
static inline long temp_of_remote(s8 hb, u8 lb)
|
||||
{
|
||||
return (hb << 3 | lb >> 5) * 125;
|
||||
}
|
||||
|
||||
static int get_local_temp(struct regmap *regmap, long *val)
|
||||
{
|
||||
unsigned int regval;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_LOCAL_TEMP, ®val);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*val = temp_of_local(regval);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int get_remote_temp(struct regmap *regmap, int index, long *val)
|
||||
{
|
||||
unsigned int regval_high;
|
||||
unsigned int regval_low;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_TEMP_MSB[index], ®val_high);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_TEMP_LSB[index], ®val_low);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*val = temp_of_remote(regval_high, regval_low);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int get_fault(struct regmap *regmap, int index, long *val)
|
||||
{
|
||||
unsigned int regval;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_STATUS[index], ®val);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*val = (u8)regval & 0x04 >> 2;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int get_offset(struct regmap *regmap, int index, long *val)
|
||||
{
|
||||
unsigned int regval_high;
|
||||
unsigned int regval_low;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_OFFSET_MSB[index], ®val_high);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_OFFSET_LSB[index], ®val_low);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*val = temp_of_remote(regval_high, regval_low);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_offset(struct regmap *regmap, int index, long val)
|
||||
{
|
||||
int ret;
|
||||
u8 high_byte;
|
||||
u8 low_byte;
|
||||
|
||||
val = clamp_val(val, -127825, 127825);
|
||||
/* offset value equals to (high_byte << 3 | low_byte >> 5) * 125 */
|
||||
val /= 125;
|
||||
high_byte = val >> 3;
|
||||
low_byte = (val & 0x07) << 5;
|
||||
|
||||
ret = regmap_write(regmap, W83773_OFFSET_MSB[index], high_byte);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return regmap_write(regmap, W83773_OFFSET_LSB[index], low_byte);
|
||||
}
|
||||
|
||||
static int get_update_interval(struct regmap *regmap, long *val)
|
||||
{
|
||||
unsigned int regval;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, W83773_CONVERSION_RATE_REG_READ, ®val);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*val = 16000 >> regval;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_update_interval(struct regmap *regmap, long val)
|
||||
{
|
||||
int rate;
|
||||
|
||||
/*
|
||||
* For valid rates, interval can be calculated as
|
||||
* interval = (1 << (8 - rate)) * 62.5;
|
||||
* Rounded rate is therefore
|
||||
* rate = 8 - __fls(interval * 8 / (62.5 * 7));
|
||||
* Use clamp_val() to avoid overflows, and to ensure valid input
|
||||
* for __fls.
|
||||
*/
|
||||
val = clamp_val(val, 62, 16000) * 10;
|
||||
rate = 8 - __fls((val * 8 / (625 * 7)));
|
||||
return regmap_write(regmap, W83773_CONVERSION_RATE_REG_WRITE, rate);
|
||||
}
|
||||
|
||||
static int w83773_read(struct device *dev, enum hwmon_sensor_types type,
|
||||
u32 attr, int channel, long *val)
|
||||
{
|
||||
struct regmap *regmap = dev_get_drvdata(dev);
|
||||
|
||||
if (type == hwmon_chip) {
|
||||
if (attr == hwmon_chip_update_interval)
|
||||
return get_update_interval(regmap, val);
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
switch (attr) {
|
||||
case hwmon_temp_input:
|
||||
if (channel == 0)
|
||||
return get_local_temp(regmap, val);
|
||||
return get_remote_temp(regmap, channel - 1, val);
|
||||
case hwmon_temp_fault:
|
||||
return get_fault(regmap, channel - 1, val);
|
||||
case hwmon_temp_offset:
|
||||
return get_offset(regmap, channel - 1, val);
|
||||
default:
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
}
|
||||
|
||||
static int w83773_write(struct device *dev, enum hwmon_sensor_types type,
|
||||
u32 attr, int channel, long val)
|
||||
{
|
||||
struct regmap *regmap = dev_get_drvdata(dev);
|
||||
|
||||
if (type == hwmon_chip && attr == hwmon_chip_update_interval)
|
||||
return set_update_interval(regmap, val);
|
||||
|
||||
if (type == hwmon_temp && attr == hwmon_temp_offset)
|
||||
return set_offset(regmap, channel - 1, val);
|
||||
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static umode_t w83773_is_visible(const void *data, enum hwmon_sensor_types type,
|
||||
u32 attr, int channel)
|
||||
{
|
||||
switch (type) {
|
||||
case hwmon_chip:
|
||||
switch (attr) {
|
||||
case hwmon_chip_update_interval:
|
||||
return 0644;
|
||||
}
|
||||
break;
|
||||
case hwmon_temp:
|
||||
switch (attr) {
|
||||
case hwmon_temp_input:
|
||||
case hwmon_temp_fault:
|
||||
return 0444;
|
||||
case hwmon_temp_offset:
|
||||
return 0644;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const u32 w83773_chip_config[] = {
|
||||
HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL,
|
||||
0
|
||||
};
|
||||
|
||||
static const struct hwmon_channel_info w83773_chip = {
|
||||
.type = hwmon_chip,
|
||||
.config = w83773_chip_config,
|
||||
};
|
||||
|
||||
static const u32 w83773_temp_config[] = {
|
||||
HWMON_T_INPUT,
|
||||
HWMON_T_INPUT | HWMON_T_FAULT | HWMON_T_OFFSET,
|
||||
HWMON_T_INPUT | HWMON_T_FAULT | HWMON_T_OFFSET,
|
||||
0
|
||||
};
|
||||
|
||||
static const struct hwmon_channel_info w83773_temp = {
|
||||
.type = hwmon_temp,
|
||||
.config = w83773_temp_config,
|
||||
};
|
||||
|
||||
static const struct hwmon_channel_info *w83773_info[] = {
|
||||
&w83773_chip,
|
||||
&w83773_temp,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct hwmon_ops w83773_ops = {
|
||||
.is_visible = w83773_is_visible,
|
||||
.read = w83773_read,
|
||||
.write = w83773_write,
|
||||
};
|
||||
|
||||
static const struct hwmon_chip_info w83773_chip_info = {
|
||||
.ops = &w83773_ops,
|
||||
.info = w83773_info,
|
||||
};
|
||||
|
||||
static const struct regmap_config w83773_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
};
|
||||
|
||||
static int w83773_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
struct device *hwmon_dev;
|
||||
struct regmap *regmap;
|
||||
int ret;
|
||||
|
||||
regmap = devm_regmap_init_i2c(client, &w83773_regmap_config);
|
||||
if (IS_ERR(regmap)) {
|
||||
dev_err(dev, "failed to allocate register map\n");
|
||||
return PTR_ERR(regmap);
|
||||
}
|
||||
|
||||
/* Set the conversion rate to 2 Hz */
|
||||
ret = regmap_write(regmap, W83773_CONVERSION_RATE_REG_WRITE, 0x05);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "error writing config rate register\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
i2c_set_clientdata(client, regmap);
|
||||
|
||||
hwmon_dev = devm_hwmon_device_register_with_info(dev,
|
||||
client->name,
|
||||
regmap,
|
||||
&w83773_chip_info,
|
||||
NULL);
|
||||
return PTR_ERR_OR_ZERO(hwmon_dev);
|
||||
}
|
||||
|
||||
static struct i2c_driver w83773_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "w83773g",
|
||||
.of_match_table = of_match_ptr(w83773_of_match),
|
||||
},
|
||||
.probe = w83773_probe,
|
||||
.id_table = w83773_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(w83773_driver);
|
||||
|
||||
MODULE_AUTHOR("Lei YU <mine260309@gmail.com>");
|
||||
MODULE_DESCRIPTION("W83773G temperature sensor driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user