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Commit 0208531d authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (tmp102) Convert to use new hwmon registration API 



Simplify code and reduce code size by using the new hwmon
registration API.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent eb1c8f43

drivers/hwmon/Kconfig

+0 −1
Original line number Diff line number Diff line
@@ -1571,7 +1571,6 @@ config SENSORS_THMC50 
config SENSORS_TMP102

	tristate "Texas Instruments TMP102"

	depends on I2C

	depends on THERMAL || !THERMAL_OF

	select REGMAP_I2C

	help

	  If you say yes here you get support for Texas Instruments TMP102

drivers/hwmon/tmp102.c

+90 −64
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ 
#include <linux/device.h>

#include <linux/jiffies.h>

#include <linux/regmap.h>

#include <linux/thermal.h>

#include <linux/of.h>



#define	DRIVER_NAME "tmp102"
@@ -79,84 +78,113 @@ static inline u16 tmp102_mC_to_reg(int val) 
	return (val * 128) / 1000;

}



static int tmp102_read_temp(void *dev, int *temp)

static int tmp102_read(struct device *dev, enum hwmon_sensor_types type,

		       u32 attr, int channel, long *temp)

{

	struct tmp102 *tmp102 = dev_get_drvdata(dev);

	unsigned int reg;

	int ret;

	unsigned int regval;

	int err, reg;



	switch (attr) {

	case hwmon_temp_input:

		/* Is it too early to return a conversion ? */

		if (time_before(jiffies, tmp102->ready_time)) {

			dev_dbg(dev, "%s: Conversion not ready yet..\n", __func__);

			return -EAGAIN;

		}

		reg = TMP102_TEMP_REG;

		break;

	case hwmon_temp_max_hyst:

		reg = TMP102_TLOW_REG;

		break;

	case hwmon_temp_max:

		reg = TMP102_THIGH_REG;

		break;

	default:

		return -EOPNOTSUPP;

	}



	ret = regmap_read(tmp102->regmap, TMP102_TEMP_REG, &reg);

	if (ret < 0)

		return ret;



	*temp = tmp102_reg_to_mC(reg);

	err = regmap_read(tmp102->regmap, reg, &regval);

	if (err < 0)

		return err;

	*temp = tmp102_reg_to_mC(regval);



	return 0;

}



static ssize_t tmp102_show_temp(struct device *dev,

				struct device_attribute *attr,

				char *buf)

static int tmp102_write(struct device *dev, enum hwmon_sensor_types type,

			u32 attr, int channel, long temp)

{

	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);

	struct tmp102 *tmp102 = dev_get_drvdata(dev);

	int regaddr = sda->index;

	unsigned int reg;

	int err;



	if (regaddr == TMP102_TEMP_REG &&

	    time_before(jiffies, tmp102->ready_time))

		return -EAGAIN;



	err = regmap_read(tmp102->regmap, regaddr, &reg);

	if (err < 0)

		return err;

	int reg;



	switch (attr) {

	case hwmon_temp_max_hyst:

		reg = TMP102_TLOW_REG;

		break;

	case hwmon_temp_max:

		reg = TMP102_THIGH_REG;

		break;

	default:

		return -EOPNOTSUPP;

	}



	return sprintf(buf, "%d\n", tmp102_reg_to_mC(reg));

	temp = clamp_val(temp, -256000, 255000);

	return regmap_write(tmp102->regmap, reg, tmp102_mC_to_reg(temp));

}



static ssize_t tmp102_set_temp(struct device *dev,

			       struct device_attribute *attr,

			       const char *buf, size_t count)

static umode_t tmp102_is_visible(const void *data, enum hwmon_sensor_types type,

				 u32 attr, int channel)

{

	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);

	struct tmp102 *tmp102 = dev_get_drvdata(dev);

	int reg = sda->index;

	long val;

	int err;



	if (kstrtol(buf, 10, &val) < 0)

		return -EINVAL;

	val = clamp_val(val, -256000, 255000);

	if (type != hwmon_temp)

		return 0;



	err = regmap_write(tmp102->regmap, reg, tmp102_mC_to_reg(val));

	return err ? : count;

	switch (attr) {

	case hwmon_temp_input:

		return S_IRUGO;

	case hwmon_temp_max_hyst:

	case hwmon_temp_max:

		return S_IRUGO | S_IWUSR;

	default:

		return 0;

	}

}



static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp102_show_temp, NULL,

			  TMP102_TEMP_REG);

static u32 tmp102_chip_config[] = {

	HWMON_C_REGISTER_TZ,

	0

};



static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, tmp102_show_temp,

			  tmp102_set_temp, TMP102_TLOW_REG);

static const struct hwmon_channel_info tmp102_chip = {

	.type = hwmon_chip,

	.config = tmp102_chip_config,

};



static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp102_show_temp,

			  tmp102_set_temp, TMP102_THIGH_REG);

static u32 tmp102_temp_config[] = {

	HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST,

	0

};



static const struct hwmon_channel_info tmp102_temp = {

	.type = hwmon_temp,

	.config = tmp102_temp_config,

};



static struct attribute *tmp102_attrs[] = {

	&sensor_dev_attr_temp1_input.dev_attr.attr,

	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,

	&sensor_dev_attr_temp1_max.dev_attr.attr,

static const struct hwmon_channel_info *tmp102_info[] = {

	&tmp102_chip,

	&tmp102_temp,

	NULL

};

ATTRIBUTE_GROUPS(tmp102);



static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = {

	.get_temp = tmp102_read_temp,

static const struct hwmon_ops tmp102_hwmon_ops = {

	.is_visible = tmp102_is_visible,

	.read = tmp102_read,

	.write = tmp102_write,

};



static const struct hwmon_chip_info tmp102_chip_info = {

	.ops = &tmp102_hwmon_ops,

	.info = tmp102_info,

};



static void tmp102_restore_config(void *data)
@@ -249,16 +277,14 @@ static int tmp102_probe(struct i2c_client *client, 
		tmp102->ready_time += msecs_to_jiffies(CONVERSION_TIME_MS);

	}



	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,

	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,

							 tmp102,

							   tmp102_groups);

							 &tmp102_chip_info,

							 NULL);

	if (IS_ERR(hwmon_dev)) {

		dev_dbg(dev, "unable to register hwmon device\n");

		return PTR_ERR(hwmon_dev);

	}

	devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,

					     &tmp102_of_thermal_ops);



	dev_info(dev, "initialized\n");



	return 0;