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lm75.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* lm75.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i3c/device.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#include <linux/regulator/consumer.h>
#include "lm75.h"
/*
* This driver handles the LM75 and compatible digital temperature sensors.
*/
enum lm75_type { /* keep sorted in alphabetical order */
adt75,
as6200,
at30ts74,
ds1775,
ds75,
ds7505,
g751,
lm75,
lm75a,
lm75b,
max6625,
max6626,
max31725,
mcp980x,
p3t1755,
pct2075,
stds75,
stlm75,
tcn75,
tmp100,
tmp101,
tmp105,
tmp112,
tmp175,
tmp275,
tmp75,
tmp75b,
tmp75c,
tmp1075,
};
/**
* struct lm75_params - lm75 configuration parameters.
* @config_reg_16bits: Configure register size is 2 bytes.
* @set_mask: Bits to set in configuration register when configuring
* the chip.
* @clr_mask: Bits to clear in configuration register when configuring
* the chip.
* @default_resolution: Default number of bits to represent the temperature
* value.
* @resolution_limits: Limit register resolution. Optional. Should be set if
* the resolution of limit registers does not match the
* resolution of the temperature register.
* @resolutions: List of resolutions associated with sample times.
* Optional. Should be set if num_sample_times is larger
* than 1, and if the resolution changes with sample times.
* If set, number of entries must match num_sample_times.
* @default_sample_time:Sample time to be set by default.
* @num_sample_times: Number of possible sample times to be set. Optional.
* Should be set if the number of sample times is larger
* than one.
* @sample_times: All the possible sample times to be set. Mandatory if
* num_sample_times is larger than 1. If set, number of
* entries must match num_sample_times.
* @alarm: Alarm bit is supported.
*/
struct lm75_params {
bool config_reg_16bits;
u16 set_mask;
u16 clr_mask;
u8 default_resolution;
u8 resolution_limits;
const u8 *resolutions;
unsigned int default_sample_time;
u8 num_sample_times;
const unsigned int *sample_times;
bool alarm;
};
/* Addresses scanned */
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
/* The LM75 registers */
#define LM75_REG_TEMP 0x00
#define LM75_REG_CONF 0x01
#define LM75_REG_HYST 0x02
#define LM75_REG_MAX 0x03
#define PCT2075_REG_IDLE 0x04
struct lm75_data {
struct regmap *regmap;
u16 orig_conf;
u8 resolution; /* In bits, 9 to 16 */
unsigned int sample_time; /* In ms */
enum lm75_type kind;
const struct lm75_params *params;
u8 reg_buf[1];
u8 val_buf[3];
};
/*-----------------------------------------------------------------------*/
static const u8 lm75_sample_set_masks[] = { 0 << 5, 1 << 5, 2 << 5, 3 << 5 };
#define LM75_SAMPLE_CLEAR_MASK (3 << 5)
/* The structure below stores the configuration values of the supported devices.
* In case of being supported multiple configurations, the default one must
* always be the first element of the array
*/
static const struct lm75_params device_params[] = {
[adt75] = {
.clr_mask = 1 << 5, /* not one-shot mode */
.default_resolution = 12,
.default_sample_time = MSEC_PER_SEC / 10,
},
[as6200] = {
.config_reg_16bits = true,
.set_mask = 0x94C0, /* 8 sample/s, 4 CF, positive polarity */
.default_resolution = 12,
.default_sample_time = 125,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 125, 250, 1000, 4000 },
.alarm = true,
},
[at30ts74] = {
.set_mask = 3 << 5, /* 12-bit mode*/
.default_resolution = 12,
.default_sample_time = 200,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 25, 50, 100, 200 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[ds1775] = {
.clr_mask = 3 << 5,
.set_mask = 2 << 5, /* 11-bit mode */
.default_resolution = 11,
.default_sample_time = 500,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 125, 250, 500, 1000 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[ds75] = {
.clr_mask = 3 << 5,
.set_mask = 2 << 5, /* 11-bit mode */
.default_resolution = 11,
.default_sample_time = 600,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 150, 300, 600, 1200 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[stds75] = {
.clr_mask = 3 << 5,
.set_mask = 2 << 5, /* 11-bit mode */
.default_resolution = 11,
.default_sample_time = 600,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 150, 300, 600, 1200 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[stlm75] = {
.default_resolution = 9,
.default_sample_time = MSEC_PER_SEC / 6,
},
[ds7505] = {
.set_mask = 3 << 5, /* 12-bit mode*/
.default_resolution = 12,
.default_sample_time = 200,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 25, 50, 100, 200 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[g751] = {
.default_resolution = 9,
.default_sample_time = MSEC_PER_SEC / 10,
},
[lm75] = {
.default_resolution = 9,
.default_sample_time = MSEC_PER_SEC / 10,
},
[lm75a] = {
.default_resolution = 9,
.default_sample_time = MSEC_PER_SEC / 10,
},
[lm75b] = {
.default_resolution = 11,
.default_sample_time = MSEC_PER_SEC / 10,
},
[max6625] = {
.default_resolution = 9,
.default_sample_time = MSEC_PER_SEC / 7,
},
[max6626] = {
.default_resolution = 12,
.default_sample_time = MSEC_PER_SEC / 7,
.resolution_limits = 9,
},
[max31725] = {
.default_resolution = 16,
.default_sample_time = MSEC_PER_SEC / 20,
},
[tcn75] = {
.default_resolution = 9,
.default_sample_time = MSEC_PER_SEC / 18,
},
[p3t1755] = {
.clr_mask = 1 << 1 | 1 << 7, /* disable SMBAlert and one-shot */
.default_resolution = 12,
.default_sample_time = 55,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 28, 55, 110, 220 },
},
[pct2075] = {
.default_resolution = 11,
.default_sample_time = MSEC_PER_SEC / 10,
.num_sample_times = 31,
.sample_times = (unsigned int []){ 100, 200, 300, 400, 500, 600,
700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700,
1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500, 2600, 2700,
2800, 2900, 3000, 3100 },
},
[mcp980x] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode */
.default_resolution = 12,
.resolution_limits = 9,
.default_sample_time = 240,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 30, 60, 120, 240 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp100] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode */
.default_resolution = 12,
.default_sample_time = 320,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 40, 80, 160, 320 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp101] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode */
.default_resolution = 12,
.default_sample_time = 320,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 40, 80, 160, 320 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp105] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode*/
.default_resolution = 12,
.default_sample_time = 220,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 28, 55, 110, 220 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp112] = {
.config_reg_16bits = true,
.set_mask = 0x60C0, /* 12-bit mode, 8 samples / second */
.clr_mask = 1 << 15, /* no one-shot mode*/
.default_resolution = 12,
.default_sample_time = 125,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 125, 250, 1000, 4000 },
.alarm = true,
},
[tmp175] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode*/
.default_resolution = 12,
.default_sample_time = 220,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 28, 55, 110, 220 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp275] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode*/
.default_resolution = 12,
.default_sample_time = 220,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 28, 55, 110, 220 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp75] = {
.set_mask = 3 << 5, /* 12-bit mode */
.clr_mask = 1 << 7, /* not one-shot mode*/
.default_resolution = 12,
.default_sample_time = 220,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 28, 55, 110, 220 },
.resolutions = (u8 []) {9, 10, 11, 12 },
},
[tmp75b] = { /* not one-shot mode, Conversion rate 37Hz */
.clr_mask = 1 << 7 | 3 << 5,
.default_resolution = 12,
.default_sample_time = MSEC_PER_SEC / 37,
.sample_times = (unsigned int []){ MSEC_PER_SEC / 37,
MSEC_PER_SEC / 18,
MSEC_PER_SEC / 9, MSEC_PER_SEC / 4 },
.num_sample_times = 4,
},
[tmp75c] = {
.clr_mask = 1 << 5, /*not one-shot mode*/
.default_resolution = 12,
.default_sample_time = MSEC_PER_SEC / 12,
},
[tmp1075] = { /* not one-shot mode, 27.5 ms sample rate */
.clr_mask = 1 << 5 | 1 << 6 | 1 << 7,
.default_resolution = 12,
.default_sample_time = 28,
.num_sample_times = 4,
.sample_times = (unsigned int []){ 28, 55, 110, 220 },
}
};
static inline long lm75_reg_to_mc(s16 temp, u8 resolution)
{
return ((temp >> (16 - resolution)) * 1000) >> (resolution - 8);
}
static inline int lm75_write_config(struct lm75_data *data, u16 set_mask,
u16 clr_mask)
{
return regmap_update_bits(data->regmap, LM75_REG_CONF,
clr_mask | LM75_SHUTDOWN, set_mask);
}
static irqreturn_t lm75_alarm_handler(int irq, void *private)
{
struct device *hwmon_dev = private;
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_alarm, 0);
return IRQ_HANDLED;
}
static int lm75_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct lm75_data *data = dev_get_drvdata(dev);
unsigned int regval;
int err, reg;
switch (type) {
case hwmon_chip:
switch (attr) {
case hwmon_chip_update_interval:
*val = data->sample_time;
break;
default:
return -EINVAL;
}
break;
case hwmon_temp:
switch (attr) {
case hwmon_temp_input:
reg = LM75_REG_TEMP;
break;
case hwmon_temp_max:
reg = LM75_REG_MAX;
break;
case hwmon_temp_max_hyst:
reg = LM75_REG_HYST;
break;
case hwmon_temp_alarm:
reg = LM75_REG_CONF;
break;
default:
return -EINVAL;
}
err = regmap_read(data->regmap, reg, ®val);
if (err < 0)
return err;
if (attr == hwmon_temp_alarm) {
switch (data->kind) {
case as6200:
case tmp112:
*val = (regval >> 13) & 0x1;
break;
default:
return -EINVAL;
}
} else {
*val = lm75_reg_to_mc(regval, data->resolution);
}
break;
default:
return -EINVAL;
}
return 0;
}
static int lm75_write_temp(struct device *dev, u32 attr, long temp)
{
struct lm75_data *data = dev_get_drvdata(dev);
u8 resolution;
int reg;
switch (attr) {
case hwmon_temp_max:
reg = LM75_REG_MAX;
break;
case hwmon_temp_max_hyst:
reg = LM75_REG_HYST;
break;
default:
return -EINVAL;
}
/*
* Resolution of limit registers is assumed to be the same as the
* temperature input register resolution unless given explicitly.
*/
if (data->params->resolution_limits)
resolution = data->params->resolution_limits;
else
resolution = data->resolution;
temp = clamp_val(temp, LM75_TEMP_MIN, LM75_TEMP_MAX);
temp = DIV_ROUND_CLOSEST(temp << (resolution - 8),
1000) << (16 - resolution);
return regmap_write(data->regmap, reg, (u16)temp);
}
static int lm75_update_interval(struct device *dev, long val)
{
struct lm75_data *data = dev_get_drvdata(dev);
u8 index;
s32 err;
index = find_closest(val, data->params->sample_times,
(int)data->params->num_sample_times);
switch (data->kind) {
default:
err = lm75_write_config(data, lm75_sample_set_masks[index],
LM75_SAMPLE_CLEAR_MASK);
if (err)
return err;
data->sample_time = data->params->sample_times[index];
if (data->params->resolutions)
data->resolution = data->params->resolutions[index];
break;
case tmp112:
case as6200:
err = regmap_update_bits(data->regmap, LM75_REG_CONF,
0xc000, (3 - index) << 14);
if (err < 0)
return err;
data->sample_time = data->params->sample_times[index];
break;
case pct2075:
err = regmap_write(data->regmap, PCT2075_REG_IDLE, index + 1);
if (err)
return err;
data->sample_time = data->params->sample_times[index];
break;
}
return 0;
}
static int lm75_write_chip(struct device *dev, u32 attr, long val)
{
switch (attr) {
case hwmon_chip_update_interval:
return lm75_update_interval(dev, val);
default:
return -EINVAL;
}
return 0;
}
static int lm75_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
switch (type) {
case hwmon_chip:
return lm75_write_chip(dev, attr, val);
case hwmon_temp:
return lm75_write_temp(dev, attr, val);
default:
return -EINVAL;
}
return 0;
}
static umode_t lm75_is_visible(const void *data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
const struct lm75_data *config_data = data;
switch (type) {
case hwmon_chip:
switch (attr) {
case hwmon_chip_update_interval:
if (config_data->params->num_sample_times > 1)
return 0644;
return 0444;
}
break;
case hwmon_temp:
switch (attr) {
case hwmon_temp_input:
return 0444;
case hwmon_temp_max:
case hwmon_temp_max_hyst:
return 0644;
case hwmon_temp_alarm:
if (config_data->params->alarm)
return 0444;
break;
}
break;
default:
break;
}
return 0;
}
static const struct hwmon_channel_info * const lm75_info[] = {
HWMON_CHANNEL_INFO(chip,
HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL),
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
HWMON_T_ALARM),
NULL
};
static const struct hwmon_ops lm75_hwmon_ops = {
.is_visible = lm75_is_visible,
.read = lm75_read,
.write = lm75_write,
};
static const struct hwmon_chip_info lm75_chip_info = {
.ops = &lm75_hwmon_ops,
.info = lm75_info,
};
static bool lm75_is_writeable_reg(struct device *dev, unsigned int reg)
{
return reg != LM75_REG_TEMP;
}
static bool lm75_is_volatile_reg(struct device *dev, unsigned int reg)
{
return reg == LM75_REG_TEMP || reg == LM75_REG_CONF;
}
static int lm75_i2c_reg_read(void *context, unsigned int reg, unsigned int *val)
{
struct i2c_client *client = context;
struct lm75_data *data = i2c_get_clientdata(client);
int ret;
if (reg == LM75_REG_CONF) {
if (!data->params->config_reg_16bits)
ret = i2c_smbus_read_byte_data(client, LM75_REG_CONF);
else
ret = i2c_smbus_read_word_data(client, LM75_REG_CONF);
} else {
ret = i2c_smbus_read_word_swapped(client, reg);
}
if (ret < 0)
return ret;
*val = ret;
return 0;
}
static int lm75_i2c_reg_write(void *context, unsigned int reg, unsigned int val)
{
struct i2c_client *client = context;
struct lm75_data *data = i2c_get_clientdata(client);
if (reg == PCT2075_REG_IDLE ||
(reg == LM75_REG_CONF && !data->params->config_reg_16bits))
return i2c_smbus_write_byte_data(client, reg, val);
else if (reg == LM75_REG_CONF)
return i2c_smbus_write_word_data(client, reg, val);
return i2c_smbus_write_word_swapped(client, reg, val);
}
static const struct regmap_bus lm75_i2c_regmap_bus = {
.reg_read = lm75_i2c_reg_read,
.reg_write = lm75_i2c_reg_write,
};
static int lm75_i3c_reg_read(void *context, unsigned int reg, unsigned int *val)
{
struct i3c_device *i3cdev = context;
struct lm75_data *data = i3cdev_get_drvdata(i3cdev);
struct i3c_priv_xfer xfers[] = {
{
.rnw = false,
.len = 1,
.data.out = data->reg_buf,
},
{
.rnw = true,
.len = 2,
.data.out = data->val_buf,
},
};
int ret;
data->reg_buf[0] = reg;
if (reg == LM75_REG_CONF && !data->params->config_reg_16bits)
xfers[1].len--;
ret = i3c_device_do_priv_xfers(i3cdev, xfers, 2);
if (ret < 0)
return ret;
if (reg == LM75_REG_CONF && !data->params->config_reg_16bits)
*val = data->val_buf[0];
else if (reg == LM75_REG_CONF)
*val = data->val_buf[0] | (data->val_buf[1] << 8);
else
*val = data->val_buf[1] | (data->val_buf[0] << 8);
return 0;
}
static int lm75_i3c_reg_write(void *context, unsigned int reg, unsigned int val)
{
struct i3c_device *i3cdev = context;
struct lm75_data *data = i3cdev_get_drvdata(i3cdev);
struct i3c_priv_xfer xfers[] = {
{
.rnw = false,
.len = 3,
.data.out = data->val_buf,
},
};
data->val_buf[0] = reg;
if (reg == PCT2075_REG_IDLE ||
(reg == LM75_REG_CONF && !data->params->config_reg_16bits)) {
xfers[0].len--;
data->val_buf[1] = val & 0xff;
} else if (reg == LM75_REG_CONF) {
data->val_buf[1] = val & 0xff;
data->val_buf[2] = (val >> 8) & 0xff;
} else {
data->val_buf[1] = (val >> 8) & 0xff;
data->val_buf[2] = val & 0xff;
}
return i3c_device_do_priv_xfers(i3cdev, xfers, 1);
}
static const struct regmap_bus lm75_i3c_regmap_bus = {
.reg_read = lm75_i3c_reg_read,
.reg_write = lm75_i3c_reg_write,
};
static const struct regmap_config lm75_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = PCT2075_REG_IDLE,
.writeable_reg = lm75_is_writeable_reg,
.volatile_reg = lm75_is_volatile_reg,
.val_format_endian = REGMAP_ENDIAN_BIG,
.cache_type = REGCACHE_MAPLE,
.use_single_read = true,
.use_single_write = true,
};
static void lm75_remove(void *data)
{
struct lm75_data *lm75 = data;
regmap_write(lm75->regmap, LM75_REG_CONF, lm75->orig_conf);
}
static int lm75_generic_probe(struct device *dev, const char *name,
enum lm75_type kind, int irq, struct regmap *regmap)
{
struct device *hwmon_dev;
struct lm75_data *data;
int status, err;
data = devm_kzalloc(dev, sizeof(struct lm75_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
/* needed by custom regmap callbacks */
dev_set_drvdata(dev, data);
data->kind = kind;
data->regmap = regmap;
err = devm_regulator_get_enable(dev, "vs");
if (err)
return err;
/* Set to LM75 resolution (9 bits, 1/2 degree C) and range.
* Then tweak to be more precise when appropriate.
*/
data->params = &device_params[data->kind];
/* Save default sample time and resolution*/
data->sample_time = data->params->default_sample_time;
data->resolution = data->params->default_resolution;
/* Cache original configuration */
err = regmap_read(data->regmap, LM75_REG_CONF, &status);
if (err)
return err;
data->orig_conf = status;
err = lm75_write_config(data, data->params->set_mask,
data->params->clr_mask);
if (err)
return err;
err = devm_add_action_or_reset(dev, lm75_remove, data);
if (err)
return err;
hwmon_dev = devm_hwmon_device_register_with_info(dev, name, data,
&lm75_chip_info, NULL);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
if (irq) {
if (data->params->alarm) {
err = devm_request_threaded_irq(dev,
irq,
NULL,
&lm75_alarm_handler,
IRQF_ONESHOT,
name,
hwmon_dev);
if (err)
return err;
} else {
/* alarm is only supported for chips with alarm bit */
dev_err(dev, "alarm interrupt is not supported\n");
}
}
dev_info(dev, "%s: sensor '%s'\n", dev_name(hwmon_dev), name);
return 0;
}
static int lm75_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct regmap *regmap;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
return -EOPNOTSUPP;
regmap = devm_regmap_init(dev, &lm75_i2c_regmap_bus, client, &lm75_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return lm75_generic_probe(dev, client->name, (uintptr_t)i2c_get_match_data(client),
client->irq, regmap);
}
static const struct i2c_device_id lm75_i2c_ids[] = {
{ "adt75", adt75, },
{ "as6200", as6200, },
{ "at30ts74", at30ts74, },
{ "ds1775", ds1775, },
{ "ds75", ds75, },
{ "ds7505", ds7505, },
{ "g751", g751, },
{ "lm75", lm75, },
{ "lm75a", lm75a, },
{ "lm75b", lm75b, },
{ "max6625", max6625, },
{ "max6626", max6626, },
{ "max31725", max31725, },
{ "max31726", max31725, },
{ "mcp980x", mcp980x, },
{ "p3t1755", p3t1755, },
{ "pct2075", pct2075, },
{ "stds75", stds75, },
{ "stlm75", stlm75, },
{ "tcn75", tcn75, },
{ "tmp100", tmp100, },
{ "tmp101", tmp101, },
{ "tmp105", tmp105, },
{ "tmp112", tmp112, },
{ "tmp175", tmp175, },
{ "tmp275", tmp275, },
{ "tmp75", tmp75, },
{ "tmp75b", tmp75b, },
{ "tmp75c", tmp75c, },
{ "tmp1075", tmp1075, },
{ /* LIST END */ }
};
MODULE_DEVICE_TABLE(i2c, lm75_i2c_ids);
struct lm75_i3c_device {
enum lm75_type type;
const char *name;
};
static const struct lm75_i3c_device lm75_i3c_p3t1755 = {
.name = "p3t1755",
.type = p3t1755,
};
static const struct i3c_device_id lm75_i3c_ids[] = {
I3C_DEVICE(0x011b, 0x152a, &lm75_i3c_p3t1755),
{ /* LIST END */ }
};
MODULE_DEVICE_TABLE(i3c, lm75_i3c_ids);
static int lm75_i3c_probe(struct i3c_device *i3cdev)
{
struct device *dev = i3cdev_to_dev(i3cdev);
const struct lm75_i3c_device *id_data;
struct regmap *regmap;
regmap = devm_regmap_init(dev, &lm75_i3c_regmap_bus, i3cdev, &lm75_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
id_data = i3c_device_match_id(i3cdev, lm75_i3c_ids)->data;
return lm75_generic_probe(dev, id_data->name, id_data->type, 0, regmap);
}
static const struct of_device_id __maybe_unused lm75_of_match[] = {
{
.compatible = "adi,adt75",
.data = (void *)adt75
},
{
.compatible = "ams,as6200",
.data = (void *)as6200
},
{
.compatible = "atmel,at30ts74",
.data = (void *)at30ts74
},
{
.compatible = "dallas,ds1775",
.data = (void *)ds1775
},
{
.compatible = "dallas,ds75",
.data = (void *)ds75
},
{
.compatible = "dallas,ds7505",
.data = (void *)ds7505
},
{
.compatible = "gmt,g751",
.data = (void *)g751
},
{
.compatible = "national,lm75",
.data = (void *)lm75
},
{
.compatible = "national,lm75a",
.data = (void *)lm75a
},
{
.compatible = "national,lm75b",
.data = (void *)lm75b
},
{
.compatible = "maxim,max6625",
.data = (void *)max6625
},
{
.compatible = "maxim,max6626",
.data = (void *)max6626
},
{
.compatible = "maxim,max31725",
.data = (void *)max31725
},
{
.compatible = "maxim,max31726",
.data = (void *)max31725
},
{
.compatible = "maxim,mcp980x",
.data = (void *)mcp980x
},
{
.compatible = "nxp,p3t1755",
.data = (void *)p3t1755
},
{
.compatible = "nxp,pct2075",
.data = (void *)pct2075
},
{
.compatible = "st,stds75",
.data = (void *)stds75
},
{
.compatible = "st,stlm75",
.data = (void *)stlm75
},
{
.compatible = "microchip,tcn75",
.data = (void *)tcn75
},
{
.compatible = "ti,tmp100",
.data = (void *)tmp100
},
{
.compatible = "ti,tmp101",
.data = (void *)tmp101
},
{
.compatible = "ti,tmp105",
.data = (void *)tmp105
},
{
.compatible = "ti,tmp112",
.data = (void *)tmp112
},
{
.compatible = "ti,tmp175",
.data = (void *)tmp175
},
{
.compatible = "ti,tmp275",
.data = (void *)tmp275
},
{
.compatible = "ti,tmp75",
.data = (void *)tmp75
},
{
.compatible = "ti,tmp75b",
.data = (void *)tmp75b
},
{
.compatible = "ti,tmp75c",
.data = (void *)tmp75c
},
{
.compatible = "ti,tmp1075",
.data = (void *)tmp1075
},
{ },
};
MODULE_DEVICE_TABLE(of, lm75_of_match);
#define LM75A_ID 0xA1
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm75_detect(struct i2c_client *new_client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = new_client->adapter;
int i;
int conf, hyst, os;
bool is_lm75a = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
/*
* Now, we do the remaining detection. There is no identification-
* dedicated register so we have to rely on several tricks: