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

Krzysztof Kozlowski
2018-07-25T10:52:03Z

On 23 July 2018 at 06:08, Matheus Castello <matheus@castello.eng.br> wrote:
> 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.

Hi,

Too many "changes". How about:

Notify core through power_supply_changed() in case of changes in state
of charge. This is useful for user-space to efficiently update current
battery level.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof

> 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
>
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