[PATCH 4/4] power: supply: max17040: Send uevent in SOC changes

Matheus Castello
2018-07-23T04:08:16Z

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