[v7,5/5] power: supply: max17040: Send uevent in SOC and status change
diff mbox series

Message ID 20191117141335.23404-6-matheus@castello.eng.br
State Superseded
Headers show
Series
  • power: supply: MAX17040: Add IRQ for low level and alert SOC changes
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Commit Message

Matheus Castello Nov. 17, 2019, 2:13 p.m. UTC
Notify core through power_supply_changed() in case of changes in state
of charge and power supply status. This is useful for user-space to
efficiently update current battery level.

Signed-off-by: Matheus Castello <matheus@castello.eng.br>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/power/supply/max17040_battery.c | 9 +++++++++
 1 file changed, 9 insertions(+)

--
2.24.0.rc2

Patch
diff mbox series

diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index 3fc9e1c7b257..1f5afabdbabc 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c
@@ -209,10 +209,19 @@  static void max17040_check_changes(struct i2c_client *client)
 static void max17040_work(struct work_struct *work)
 {
 	struct max17040_chip *chip;
+	int last_soc, last_status;

 	chip = container_of(work, struct max17040_chip, work.work);
+
+	/* store SOC and status to check changes */
+	last_soc = chip->soc;
+	last_status = chip->status;
 	max17040_check_changes(chip->client);

+	/* check changes and send uevent */
+	if (last_soc != chip->soc || last_status != chip->status)
+		power_supply_changed(chip->battery);
+
 	queue_delayed_work(system_power_efficient_wq, &chip->work,
 			   MAX17040_DELAY);
 }