Re: [PATCH RFC] power: reset: qcom-pon: Drop reason shift for PMK8350

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 9/7/26 6:44 PM, Alexander Koskovich wrote:
> On the PMK8350 the SOFT_RB_SPARE register does not exist, the reset
> reason is instead kept in SDAM and written through the reboot-reason
> nvmem cell.
> 
> Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
> ---
> Would like some feedback on this as I'm seeing conflicting results,
> SOFT_RB_SPARE does not exist on HLOS but it looks like the downstream
> qpnp-power-on driver writes to XVDD_RB_SPARE2 for GEN3, which is on PBS.
> 
> Though, targets like waipio don't seem to have access to write to PBS
> from HLOS? Get SPMI errors when I try. Didn't have an issue doing so on
> milos though.
> 
> Besides, the bindings doesn't allow reboot modes on PMK8350 so maybe
> setting no reason shift is correct regardless so it gets skipped?
> ---

Maybe +Kamal or +Fenglin would know more

Konrad

>  drivers/power/reset/qcom-pon.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/power/reset/qcom-pon.c b/drivers/power/reset/qcom-pon.c
> index 7e108982a582..9cd55f5536b4 100644
> --- a/drivers/power/reset/qcom-pon.c
> +++ b/drivers/power/reset/qcom-pon.c
> @@ -90,7 +90,7 @@ static const struct of_device_id qcom_pon_id_table[] = {
>  	{ .compatible = "qcom,pm8941-pon", .data = (void *)NO_REASON_SHIFT },
>  	{ .compatible = "qcom,pms405-pon", .data = (void *)GEN1_REASON_SHIFT },
>  	{ .compatible = "qcom,pm8998-pon", .data = (void *)GEN2_REASON_SHIFT },
> -	{ .compatible = "qcom,pmk8350-pon", .data = (void *)GEN2_REASON_SHIFT },
> +	{ .compatible = "qcom,pmk8350-pon", .data = (void *)NO_REASON_SHIFT },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, qcom_pon_id_table);
> 
> ---
> base-commit: 944a035ecca915ae947905dcfb03f2b9dc6d032c
> change-id: 20260907-pon-pbs-76b7ecaafe33
> 
> Best regards,