[PATCH 4/4] power: supply: max17040: Send uevent in SOC changes
From: Matheus Castello <matheus@castello.eng.br>
Date: 2018-07-23 04:55:30
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
Add check for changes in state of charge from delayed work, so in case of changes we call power_supply_changed to send an uevent. power_supply_changed send an uevent for alert user space about changes, is useful for example to user space apps made changes in UI battery level or made other decisions. Signed-off-by: Matheus Castello <matheus@castello.eng.br> --- drivers/power/supply/max17040_battery.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index 3efa52d32b44..72915ac9e13b 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c@@ -202,14 +202,22 @@ static void max17040_get_of_data(struct max17040_chip *chip) static void max17040_work(struct work_struct *work) { struct max17040_chip *chip; + u16 last_soc; chip = container_of(work, struct max17040_chip, work.work); + /* store SOC for check change */ + last_soc = chip->soc; + max17040_get_vcell(chip->client); max17040_get_soc(chip->client); max17040_get_online(chip->client); max17040_get_status(chip->client); + /* check changes and send uevent */ + if (last_soc != chip->soc) + power_supply_changed(chip->battery); + queue_delayed_work(system_power_efficient_wq, &chip->work, MAX17040_DELAY); }
--
2.13.3