diff options
Diffstat (limited to 'drivers/hwmon/max31827.c')
| -rw-r--r-- | drivers/hwmon/max31827.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/hwmon/max31827.c b/drivers/hwmon/max31827.c index f8a13b30f100..48e8f8ba4d05 100644 --- a/drivers/hwmon/max31827.c +++ b/drivers/hwmon/max31827.c @@ -24,6 +24,7 @@ #define MAX31827_CONFIGURATION_1SHOT_MASK BIT(0) #define MAX31827_CONFIGURATION_CNV_RATE_MASK GENMASK(3, 1) +#define MAX31827_CONFIGURATION_PEC_EN_MASK BIT(4) #define MAX31827_CONFIGURATION_TIMEOUT_MASK BIT(5) #define MAX31827_CONFIGURATION_RESOLUTION_MASK GENMASK(7, 6) #define MAX31827_CONFIGURATION_ALRM_POL_MASK BIT(8) @@ -46,6 +47,11 @@ #define MAX31827_M_DGR_TO_16_BIT(x) (((x) << 4) / 1000) #define MAX31827_DEVICE_ENABLE(x) ((x) ? 0xA : 0x0) +/* + * The enum passed in the .data pointer of struct of_device_id must + * start with a value != 0 since that is a requirement for using + * device_get_match_data(). + */ enum chips { max31827 = 1, max31828, max31829 }; enum max31827_cnv { @@ -382,7 +388,8 @@ static int max31827_write(struct device *dev, enum hwmon_sensor_types type, } case hwmon_chip: - if (attr == hwmon_chip_update_interval) { + switch (attr) { + case hwmon_chip_update_interval: if (!st->enable) return -EINVAL; @@ -410,14 +417,18 @@ static int max31827_write(struct device *dev, enum hwmon_sensor_types type, return ret; st->update_interval = val; - } - break; + return 0; + case hwmon_chip_pec: + return regmap_update_bits(st->regmap, MAX31827_CONFIGURATION_REG, + MAX31827_CONFIGURATION_PEC_EN_MASK, + val ? MAX31827_CONFIGURATION_PEC_EN_MASK : 0); + default: + return -EOPNOTSUPP; + } default: return -EOPNOTSUPP; } - - return 0; } static ssize_t temp1_resolution_show(struct device *dev, @@ -583,7 +594,7 @@ static const struct hwmon_channel_info *max31827_info[] = { HWMON_T_MIN_HYST | HWMON_T_MIN_ALARM | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_MAX_ALARM), - HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL), + HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL | HWMON_C_PEC), NULL, }; |