[PATCH v4 4/4] power: supply: max17040: Send uevent in SOC and status change

Matheus Castello
2019-10-31T19:05:48Z

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>
---
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 802575342c72..0ed3d856e4f5 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c
@@ -210,10 +210,19 @@ 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