Re: [PATCH 2/4] leds: rgb: qcom-lpg: add qcom,pmk8850-pwm compatible

[Lee Jones]

--- checkpatch.pl (1 issue) ---
Line 23: WARNING: DT compatible string "qcom,pmk8850-pwm" appears un-documented -- check ./Documentation/devicetree/bindings/
----------------------------------

On Thu, 15 Oct 2026, Srinivas Kandagatla wrote:

> The PMK8850 sleep-clock PMIC on Snapdragon X2 Elite (Mahua) exposes
> the same two-channel LPG/PWM block as PMK8550 at 0xe800/0xe900, so
> reuse pmk8550_pwm_data.
>
> Used on the Lenovo ThinkPad T14s Gen 7 to drive the eDP backlight
> (EDP_BL/PWMR_BV_PS).
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxxxxxxxx>
> ---
>  drivers/leds/rgb/leds-qcom-lpg.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
> index 24ffe079f221..485fa2a7a848 100644
> --- a/drivers/leds/rgb/leds-qcom-lpg.c
> +++ b/drivers/leds/rgb/leds-qcom-lpg.c
> @@ -1837,6 +1837,7 @@ static const struct of_device_id lpg_of_table[] = {
>  	{ .compatible = "qcom,pmi8998-lpg", .data = &pmi8998_lpg_data },
>  	{ .compatible = "qcom,pmc8180c-lpg", .data = &pm8150l_lpg_data },
>  	{ .compatible = "qcom,pmk8550-pwm", .data = &pmk8550_pwm_data },
> +	{ .compatible = "qcom,pmk8850-pwm", .data = &pmk8550_pwm_data },

If PMK8850 is completely compatible with PMK8550, why are we adding a
new match entry here instead of using 'qcom,pmk8550-pwm' as a fallback
compatible?

>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, lpg_of_table);
> -- 
> 2.53.0
>
>

-- 
Lee Jones