Re: [PATCH 12/18] ARM: dts: qcom: msm8974-samsung-klte: correct fuel gauge interrupt trigger level

[Iskren Chernev]

On 12/10/20 11:25 PM, Krzysztof Kozlowski wrote:
> The Maxim fuel gauge datasheets describe the interrupt line as active
> low with a requirement of acknowledge from the CPU.  The falling edge
> interrupt will mostly work but it's not correct.
>
> Fixes: da8d46992e67 ("ARM: dts: qcom: msm8974-klte: Add fuel gauge")
> Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> ---
>  arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts 
b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
> index 97352de91314..64a3fdb79539 100644
> --- a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
> +++ b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
> @@ -691,7 +691,7 @@ fuelgauge@36 {
>              maxim,rcomp = /bits/ 8 <0x56>;
>
>              interrupt-parent = <&pma8084_gpios>;
> -            interrupts = <21 IRQ_TYPE_EDGE_FALLING>;
> +            interrupts = <21 IRQ_TYPE_LEVEL_LOW>;
>
>              pinctrl-names = "default";
>              pinctrl-0 = <&fuelgauge_pin>;

After testing this patch + the rfc modifying 17040 driver I can confirm it
works on the klte. Also, according to the max17048 datasheet, the ALRT pin
is active low, so everything is in order.

Acked-By: Iskren Chernev <iskren.chernev@xxxxxxxxx>
Tested-By: Iskren Chernev <iskren.chernev@xxxxxxxxx>