diff options
Diffstat (limited to 'drivers/hwmon/tmp401.c')
| -rw-r--r-- | drivers/hwmon/tmp401.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c index b86d9df7105d..cc0a1c219b1f 100644 --- a/drivers/hwmon/tmp401.c +++ b/drivers/hwmon/tmp401.c @@ -41,6 +41,8 @@ enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 }; #define TMP401_STATUS 0x02 #define TMP401_CONFIG 0x03 #define TMP401_CONVERSION_RATE 0x04 +#define TMP4XX_N_FACTOR_REG 0x18 +#define TMP43X_BETA_RANGE 0x25 #define TMP401_TEMP_CRIT_HYST 0x21 #define TMP401_MANUFACTURER_ID_REG 0xFE #define TMP401_DEVICE_ID_REG 0xFF @@ -543,6 +545,8 @@ static int tmp401_init_client(struct tmp401_data *data) struct regmap *regmap = data->regmap; u32 config, config_orig; int ret; + u32 val = 0; + s32 nfactor = 0; /* Set conversion rate to 2 Hz */ ret = regmap_write(regmap, TMP401_CONVERSION_RATE, 5); @@ -557,12 +561,50 @@ static int tmp401_init_client(struct tmp401_data *data) config_orig = config; config &= ~TMP401_CONFIG_SHUTDOWN; + if (of_property_read_bool(data->client->dev.of_node, "ti,extended-range-enable")) { + /* Enable measurement over extended temperature range */ + config |= TMP401_CONFIG_RANGE; + } + data->extended_range = !!(config & TMP401_CONFIG_RANGE); - if (config != config_orig) + if (config != config_orig) { ret = regmap_write(regmap, TMP401_CONFIG, config); + if (ret < 0) + return ret; + } - return ret; + ret = of_property_read_u32(data->client->dev.of_node, "ti,n-factor", &nfactor); + if (!ret) { + if (data->kind == tmp401) { + dev_err(&data->client->dev, "ti,tmp401 does not support n-factor correction\n"); + return -EINVAL; + } + if (nfactor < -128 || nfactor > 127) { + dev_err(&data->client->dev, "n-factor is invalid (%d)\n", nfactor); + return -EINVAL; + } + ret = regmap_write(regmap, TMP4XX_N_FACTOR_REG, (unsigned int)nfactor); + if (ret < 0) + return ret; + } + + ret = of_property_read_u32(data->client->dev.of_node, "ti,beta-compensation", &val); + if (!ret) { + if (data->kind == tmp401 || data->kind == tmp411) { + dev_err(&data->client->dev, "ti,tmp401 or ti,tmp411 does not support beta compensation\n"); + return -EINVAL; + } + if (val > 15) { + dev_err(&data->client->dev, "beta-compensation is invalid (%u)\n", val); + return -EINVAL; + } + ret = regmap_write(regmap, TMP43X_BETA_RANGE, val); + if (ret < 0) + return ret; + } + + return 0; } static int tmp401_detect(struct i2c_client *client, @@ -708,10 +750,21 @@ static int tmp401_probe(struct i2c_client *client) return 0; } +static const struct of_device_id __maybe_unused tmp4xx_of_match[] = { + { .compatible = "ti,tmp401", }, + { .compatible = "ti,tmp411", }, + { .compatible = "ti,tmp431", }, + { .compatible = "ti,tmp432", }, + { .compatible = "ti,tmp435", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tmp4xx_of_match); + static struct i2c_driver tmp401_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "tmp401", + .of_match_table = of_match_ptr(tmp4xx_of_match), }, .probe_new = tmp401_probe, .id_table = tmp401_id, |