Commit d7a85cde authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm75) Add support for writing sampling period on PCT2075 



For PCT7027, the sampling period is configured using a dedicated
register.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent cee04a01

drivers/hwmon/lm75.c

+14 −1
Original line number Diff line number Diff line
@@ -95,6 +95,7 @@ static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c, 
#define LM75_REG_CONF		0x01

#define LM75_REG_HYST		0x02

#define LM75_REG_MAX		0x03

#define PCT2075_REG_IDLE	0x04



/* Each client has this additional data */

struct lm75_data {
@@ -199,6 +200,11 @@ static const struct lm75_params device_params[] = { 
	[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 */
@@ -422,6 +428,13 @@ static int lm75_update_interval(struct device *dev, long val) 
			return err;

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

		break;

	case pct2075:

		err = i2c_smbus_write_byte_data(data->client, PCT2075_REG_IDLE,

						index + 1);

		if (err)

			return err;

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

		break;

	}

	return 0;

}
@@ -512,7 +525,7 @@ static bool lm75_is_volatile_reg(struct device *dev, unsigned int reg) 
static const struct regmap_config lm75_regmap_config = {

	.reg_bits = 8,

	.val_bits = 16,

	.max_register = LM75_REG_MAX,

	.max_register = PCT2075_REG_IDLE,

	.writeable_reg = lm75_is_writeable_reg,

	.volatile_reg = lm75_is_volatile_reg,

	.val_format_endian = REGMAP_ENDIAN_BIG,