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

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

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2019-08-08 19:28:51 -07:00
parent cee04a013a
commit d7a85cde90
1 changed files with 14 additions and 1 deletions
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15
drivers/hwmon/lm75.c
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@ -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,