forked from Minki/linux
6748703856
Many hwmon drivers don't use the id information provided by the old
i2c probe function, and the remainder can easily be adapted to the new
form ("probe_new") by calling i2c_match_id explicitly.
This avoids scanning the identifier tables during probes.
Drivers which didn't use the id are converted as-is; drivers which did
are modified as follows:
* if the information in i2c_client is sufficient, that's used instead
(client->name);
* anything else is handled by calling i2c_match_id() with the same
level of error-handling (if any) as before.
A few drivers aren't included in this patch because they have a
different set of maintainers. They will be covered by other patches.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200813160222.1503401-1-steve@sk2.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
183 lines
4.6 KiB
C
183 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Texas Instruments TMP103 SMBus temperature sensor driver
|
|
* Copyright (C) 2014 Heiko Schocher <hs@denx.de>
|
|
*
|
|
* Based on:
|
|
* Texas Instruments TMP102 SMBus temperature sensor driver
|
|
*
|
|
* Copyright (C) 2010 Steven King <sfking@fdwdc.com>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/device.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#define TMP103_TEMP_REG 0x00
|
|
#define TMP103_CONF_REG 0x01
|
|
#define TMP103_TLOW_REG 0x02
|
|
#define TMP103_THIGH_REG 0x03
|
|
|
|
#define TMP103_CONF_M0 0x01
|
|
#define TMP103_CONF_M1 0x02
|
|
#define TMP103_CONF_LC 0x04
|
|
#define TMP103_CONF_FL 0x08
|
|
#define TMP103_CONF_FH 0x10
|
|
#define TMP103_CONF_CR0 0x20
|
|
#define TMP103_CONF_CR1 0x40
|
|
#define TMP103_CONF_ID 0x80
|
|
#define TMP103_CONF_SD (TMP103_CONF_M1)
|
|
#define TMP103_CONF_SD_MASK (TMP103_CONF_M0 | TMP103_CONF_M1)
|
|
|
|
#define TMP103_CONFIG (TMP103_CONF_CR1 | TMP103_CONF_M1)
|
|
#define TMP103_CONFIG_MASK (TMP103_CONF_CR0 | TMP103_CONF_CR1 | \
|
|
TMP103_CONF_M0 | TMP103_CONF_M1)
|
|
|
|
static inline int tmp103_reg_to_mc(s8 val)
|
|
{
|
|
return val * 1000;
|
|
}
|
|
|
|
static inline u8 tmp103_mc_to_reg(int val)
|
|
{
|
|
return DIV_ROUND_CLOSEST(val, 1000);
|
|
}
|
|
|
|
static ssize_t tmp103_temp_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
|
|
struct regmap *regmap = dev_get_drvdata(dev);
|
|
unsigned int regval;
|
|
int ret;
|
|
|
|
ret = regmap_read(regmap, sda->index, ®val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%d\n", tmp103_reg_to_mc(regval));
|
|
}
|
|
|
|
static ssize_t tmp103_temp_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
|
|
struct regmap *regmap = dev_get_drvdata(dev);
|
|
long val;
|
|
int ret;
|
|
|
|
if (kstrtol(buf, 10, &val) < 0)
|
|
return -EINVAL;
|
|
|
|
val = clamp_val(val, -55000, 127000);
|
|
ret = regmap_write(regmap, sda->index, tmp103_mc_to_reg(val));
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(temp1_input, tmp103_temp, TMP103_TEMP_REG);
|
|
|
|
static SENSOR_DEVICE_ATTR_RW(temp1_min, tmp103_temp, TMP103_TLOW_REG);
|
|
|
|
static SENSOR_DEVICE_ATTR_RW(temp1_max, tmp103_temp, TMP103_THIGH_REG);
|
|
|
|
static struct attribute *tmp103_attrs[] = {
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
NULL
|
|
};
|
|
ATTRIBUTE_GROUPS(tmp103);
|
|
|
|
static bool tmp103_regmap_is_volatile(struct device *dev, unsigned int reg)
|
|
{
|
|
return reg == TMP103_TEMP_REG;
|
|
}
|
|
|
|
static const struct regmap_config tmp103_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = TMP103_THIGH_REG,
|
|
.volatile_reg = tmp103_regmap_is_volatile,
|
|
};
|
|
|
|
static int tmp103_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct device *hwmon_dev;
|
|
struct regmap *regmap;
|
|
int ret;
|
|
|
|
regmap = devm_regmap_init_i2c(client, &tmp103_regmap_config);
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(dev, "failed to allocate register map\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
ret = regmap_update_bits(regmap, TMP103_CONF_REG, TMP103_CONFIG_MASK,
|
|
TMP103_CONFIG);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "error writing config register\n");
|
|
return ret;
|
|
}
|
|
|
|
i2c_set_clientdata(client, regmap);
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
|
regmap, tmp103_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static int __maybe_unused tmp103_suspend(struct device *dev)
|
|
{
|
|
struct regmap *regmap = dev_get_drvdata(dev);
|
|
|
|
return regmap_update_bits(regmap, TMP103_CONF_REG,
|
|
TMP103_CONF_SD_MASK, 0);
|
|
}
|
|
|
|
static int __maybe_unused tmp103_resume(struct device *dev)
|
|
{
|
|
struct regmap *regmap = dev_get_drvdata(dev);
|
|
|
|
return regmap_update_bits(regmap, TMP103_CONF_REG,
|
|
TMP103_CONF_SD_MASK, TMP103_CONF_SD);
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(tmp103_dev_pm_ops, tmp103_suspend, tmp103_resume);
|
|
|
|
static const struct i2c_device_id tmp103_id[] = {
|
|
{ "tmp103", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tmp103_id);
|
|
|
|
static const struct of_device_id __maybe_unused tmp103_of_match[] = {
|
|
{ .compatible = "ti,tmp103" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tmp103_of_match);
|
|
|
|
static struct i2c_driver tmp103_driver = {
|
|
.driver = {
|
|
.name = "tmp103",
|
|
.of_match_table = of_match_ptr(tmp103_of_match),
|
|
.pm = &tmp103_dev_pm_ops,
|
|
},
|
|
.probe_new = tmp103_probe,
|
|
.id_table = tmp103_id,
|
|
};
|
|
|
|
module_i2c_driver(tmp103_driver);
|
|
|
|
MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
|
|
MODULE_DESCRIPTION("Texas Instruments TMP103 temperature sensor driver");
|
|
MODULE_LICENSE("GPL");
|