[PATCH v7 5/5] power: supply: max17040: Send uevent in SOC and status change
From: Matheus Castello <matheus@castello.eng.br>
Date: 2019-11-17 14:15:49
Also in:
linux-pm, lkml
Subsystem:
maxim max17040 family fuel gauge drivers, power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
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(+)
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); } --
2.24.0.rc2