diff options
Diffstat (limited to 'drivers/hwmon/ina2xx.c')
| -rw-r--r-- | drivers/hwmon/ina2xx.c | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c index d8415d1f21fc..9ab4205622e2 100644 --- a/drivers/hwmon/ina2xx.c +++ b/drivers/hwmon/ina2xx.c @@ -73,6 +73,11 @@ #define INA226_READ_AVG(reg) (((reg) & INA226_AVG_RD_MASK) >> 9) #define INA226_SHIFT_AVG(val) ((val) << 9) +#define INA226_ALERT_POLARITY_MASK 0x0002 +#define INA226_SHIFT_ALERT_POLARITY(val) ((val) << 1) +#define INA226_ALERT_POL_LOW 0 +#define INA226_ALERT_POL_HIGH 1 + /* bit number of alert functions in Mask/Enable Register */ #define INA226_SHUNT_OVER_VOLTAGE_BIT 15 #define INA226_SHUNT_UNDER_VOLTAGE_BIT 14 @@ -178,6 +183,14 @@ static u16 ina226_interval_to_reg(int interval) return INA226_SHIFT_AVG(avg_bits); } +static int ina2xx_set_alert_polarity(struct ina2xx_data *data, + unsigned long val) +{ + return regmap_update_bits(data->regmap, INA226_MASK_ENABLE, + INA226_ALERT_POLARITY_MASK, + INA226_SHIFT_ALERT_POLARITY(val)); +} + /* * Calibration register is set to the best value, which eliminates * truncation errors on calculating current register in hardware. @@ -612,8 +625,6 @@ static const struct attribute_group ina226_group = { .attrs = ina226_attrs, }; -static const struct i2c_device_id ina2xx_id[]; - static int ina2xx_probe(struct i2c_client *client) { struct device *dev = &client->dev; @@ -623,10 +634,7 @@ static int ina2xx_probe(struct i2c_client *client) int ret, group = 0; enum ina2xx_ids chip; - if (client->dev.of_node) - chip = (uintptr_t)of_device_get_match_data(&client->dev); - else - chip = i2c_match_id(ina2xx_id, client)->driver_data; + chip = (uintptr_t)i2c_get_match_data(client); data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) @@ -659,6 +667,25 @@ static int ina2xx_probe(struct i2c_client *client) if (ret) return dev_err_probe(dev, ret, "failed to enable vs regulator\n"); + if (chip == ina226) { + if (of_property_read_bool(dev->of_node, "ti,alert-polarity-active-high")) { + ret = ina2xx_set_alert_polarity(data, + INA226_ALERT_POL_HIGH); + if (ret < 0) { + return dev_err_probe(dev, ret, + "failed to set alert polarity active high\n"); + } + } else { + /* Set default value i.e active low */ + ret = ina2xx_set_alert_polarity(data, + INA226_ALERT_POL_LOW); + if (ret < 0) { + return dev_err_probe(dev, ret, + "failed to set alert polarity active low\n"); + } + } + } + ret = ina2xx_init(data); if (ret < 0) { dev_err(dev, "error configuring the device: %d\n", ret); |