[PATCH v1 5/9] power: supply: max17042_battery: Keep only critical alerts during suspend

[Vincent Cloutier]

From: Vincent Cloutier <vincent@xxxxxxxxxxx>

Disable MAX17055 dSOCi while the system is suspended so state-of-charge changes do not wake the system repeatedly. Leave SALRT armed for the critical low-battery threshold and restore runtime alert handling on resume.

Signed-off-by: Vincent Cloutier <vincent@xxxxxxxxxxx>
---
 drivers/power/supply/max17042_battery.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c
index 09bb1babb0d6..b93fedf183b1 100644
--- a/drivers/power/supply/max17042_battery.c
+++ b/drivers/power/supply/max17042_battery.c
@@ -903,6 +903,16 @@ static void max17042_enable_soc_alerts(struct max17042_chip *chip)
 	max17042_set_soc_threshold(chip, 1);
 }
 
+static void max17042_suspend_soc_alerts(struct max17042_chip *chip)
+{
+	if (chip->chip_type != MAXIM_DEVICE_TYPE_MAX17055)
+		return;
+
+	regmap_update_bits(chip->regmap, MAX17055_Config2,
+			   CFG2_DSOCI_BIT_ENBL, 0);
+	max17042_set_critical_soc_threshold(chip);
+}
+
 static irqreturn_t max17042_thread_handler(int id, void *dev)
 {
 	struct max17042_chip *chip = dev;
@@ -1220,6 +1230,7 @@ static int max17042_suspend(struct device *dev)
 	 */
 	if (chip->irq) {
 		disable_irq(chip->irq);
+		max17042_suspend_soc_alerts(chip);
 		enable_irq_wake(chip->irq);
 	}
 
@@ -1233,8 +1244,8 @@ static int max17042_resume(struct device *dev)
 	if (chip->irq) {
 		disable_irq_wake(chip->irq);
 		enable_irq(chip->irq);
-		/* re-program the SOC thresholds to 1% change */
-		max17042_set_soc_threshold(chip, 1);
+		/* re-arm runtime SOC alerts */
+		max17042_enable_soc_alerts(chip);
 	}
 
 	return 0;
-- 
2.53.0