| Message ID | 20210914121806.1301131-1-sebastian.krzyszkowiak@puri.sm |
|---|---|
| State | Accepted |
| Commit | 0cf48167b87e388fa1268c9fe6d2443ae7f43d8a |
| Headers | show |
| Series | [v2,1/2] power: supply: max17042_battery: Clear status bits in interrupt handler | expand |
On 14/09/2021 14:18, Sebastian Krzyszkowiak wrote: > The gauge requires us to clear the status bits manually for some alerts > to be properly dismissed. Previously the IRQ was configured to react only > on falling edge, which wasn't technically correct (the ALRT line is active > low), but it had a happy side-effect of preventing interrupt storms > on uncleared alerts from happening. > > Fixes: 7fbf6b731bca ("power: supply: max17042: Do not enforce (incorrect) interrupt trigger type") > Cc: <stable@vger.kernel.org> > Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> > --- > v2: added a comment on why it clears all alert bits > --- > drivers/power/supply/max17042_battery.c | 4 ++++ > 1 file changed, 4 insertions(+) > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Best regards, Krzysztof
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index 8dffae76b6a3..da78ffe6a3ec 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -876,6 +876,10 @@ static irqreturn_t max17042_thread_handler(int id, void *dev) max17042_set_soc_threshold(chip, 1); } + /* we implicitly handle all alerts via power_supply_changed */ + regmap_clear_bits(chip->regmap, MAX17042_STATUS, + 0xFFFF & ~(STATUS_POR_BIT | STATUS_BST_BIT)); + power_supply_changed(chip->battery); return IRQ_HANDLED; }
The gauge requires us to clear the status bits manually for some alerts to be properly dismissed. Previously the IRQ was configured to react only on falling edge, which wasn't technically correct (the ALRT line is active low), but it had a happy side-effect of preventing interrupt storms on uncleared alerts from happening. Fixes: 7fbf6b731bca ("power: supply: max17042: Do not enforce (incorrect) interrupt trigger type") Cc: <stable@vger.kernel.org> Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> --- v2: added a comment on why it clears all alert bits --- drivers/power/supply/max17042_battery.c | 4 ++++ 1 file changed, 4 insertions(+)