Commit cee04a01 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm75) Add support for writing conversion time for TMP112 



TMP112 uses an uncommon method to write the conversion time: its
configuration register is 16 bit wide, and the conversion time is
configured in its second byte.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 040b106f

drivers/hwmon/lm75.c

+26 −9
Original line number Diff line number Diff line
@@ -242,6 +242,8 @@ static const struct lm75_params device_params[] = { 
		.clr_mask = 1 << 7,	/* no one-shot mode*/

		.default_resolution = 12,

		.default_sample_time = MSEC_PER_SEC / 4,

		.num_sample_times = 4,

		.sample_times = (unsigned int []){ 125, 250, 1000, 4000 },

	},

	[tmp175] = {

		.set_mask = 3 << 5,	/* 12-bit mode */
@@ -391,12 +393,15 @@ static int lm75_write_temp(struct device *dev, u32 attr, long temp) 
static int lm75_update_interval(struct device *dev, long val)

{

	struct lm75_data *data = dev_get_drvdata(dev);

	unsigned int reg;

	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)
@@ -405,7 +410,19 @@ static int lm75_update_interval(struct device *dev, long val) 
		data->sample_time = data->params->sample_times[index];

		if (data->params->resolutions)

			data->resolution = data->params->resolutions[index];



		break;

	case tmp112:

		err = regmap_read(data->regmap, LM75_REG_CONF, &reg);

		if (err < 0)

			return err;

		reg &= ~0x00c0;

		reg |= (3 - index) << 6;

		err = regmap_write(data->regmap, LM75_REG_CONF, reg);

		if (err < 0)

			return err;

		data->sample_time = data->params->sample_times[index];

		break;

	}

	return 0;

}
@@ -489,7 +506,7 @@ static bool lm75_is_writeable_reg(struct device *dev, unsigned int reg) 


static bool lm75_is_volatile_reg(struct device *dev, unsigned int reg)

{

	return reg == LM75_REG_TEMP;

	return reg == LM75_REG_TEMP || reg == LM75_REG_CONF;

}



static const struct regmap_config lm75_regmap_config = {

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