[PATCH 13/17] hwmon: (ina238) Support active-high alert polarity

[Guenter Roeck <linux@roeck-us.net>]

All chips supported by this driver support configurable active-high
alert priority. This is already documented in the devicetree description.
Add support for it to the driver.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/ina238.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/ina238.c b/drivers/hwmon/ina238.c
index 4d5b383b2521..24e396c69ae2 100644
--- a/drivers/hwmon/ina238.c
+++ b/drivers/hwmon/ina238.c
@@ -60,6 +60,7 @@
 #define INA238_ADC_CONFIG_DEFAULT	0xfb6a
 /* Configure alerts to be based on averaged value (SLOWALERT) */
 #define INA238_DIAG_ALERT_DEFAULT	0x2000
+#define INA238_DIAG_ALERT_APOL		BIT(12)
 /*
  * This driver uses a fixed calibration value in order to scale current/power
  * based on a fixed shunt resistor value. This allows for conversion within the
@@ -793,8 +794,11 @@ static int ina238_probe(struct i2c_client *client)
 	}
 
 	/* Setup alert/alarm configuration */
-	ret = regmap_write(data->regmap, INA238_DIAG_ALERT,
-			   INA238_DIAG_ALERT_DEFAULT);
+	config = INA238_DIAG_ALERT_DEFAULT;
+	if (device_property_read_bool(dev, "ti,alert-polarity-active-high"))
+		config |= INA238_DIAG_ALERT_APOL;
+
+	ret = regmap_write(data->regmap, INA238_DIAG_ALERT, config);
 	if (ret < 0) {
 		dev_err(dev, "error configuring the device: %d\n", ret);
 		return -ENODEV;
-- 
2.45.2