[PATCH 07/11] hwmon: (ina2xx) Set alert latch when enabling alerts

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

Alerts should only be cleared after reported, not immediately after the
alert condition has been cleared. Set the latch enable bit to keep alerts
latched until the alert register has been read from the chip.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/ina2xx.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
index f7d78588e579..9016c90f23c9 100644
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -67,6 +67,7 @@
 
 #define INA226_READ_AVG(reg)		FIELD_GET(INA226_AVG_RD_MASK, reg)
 
+#define INA226_ALERT_LATCH_ENABLE	BIT(0)
 #define INA226_ALERT_POLARITY_MASK	BIT(1)
 #define INA226_ALERT_POL_LOW		0
 #define INA226_ALERT_POL_HIGH		1
@@ -440,7 +441,7 @@ static ssize_t ina226_alert_store(struct device *dev,
 	 */
 	mutex_lock(&data->config_lock);
 	ret = regmap_update_bits(regmap, INA226_MASK_ENABLE,
-				 INA226_ALERT_CONFIG_MASK, 0);
+				 INA226_ALERT_CONFIG_MASK | INA226_ALERT_LATCH_ENABLE, 0);
 	if (ret < 0)
 		goto abort;
 
@@ -451,8 +452,8 @@ static ssize_t ina226_alert_store(struct device *dev,
 
 	if (val != 0) {
 		ret = regmap_update_bits(regmap, INA226_MASK_ENABLE,
-					 INA226_ALERT_CONFIG_MASK,
-					 attr->index);
+					 INA226_ALERT_CONFIG_MASK | INA226_ALERT_LATCH_ENABLE,
+					 attr->index | INA226_ALERT_LATCH_ENABLE);
 		if (ret < 0)
 			goto abort;
 	}
-- 
2.45.2