Re: [PATCH v2 3/3] arm64: dts: qcom: sc7280: Add wcd9380 pinmux

[Srinivasa Rao Mandadapu]

On 2/9/2022 2:42 AM, Stephen Boyd wrote:
Thanks for your time Stephen!!!
> Quoting Srinivasa Rao Mandadapu (2022-02-08 07:34:14)
> > Add pinmux to reset wcd codec, conneceted on SC7280 based platforms.
> >
> > Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@xxxxxxxxxxx>
> > Co-developed-by: Venkata Prasad Potturu <quic_potturu@xxxxxxxxxxx>
> > Signed-off-by: Venkata Prasad Potturu <quic_potturu@xxxxxxxxxxx>
> > ---
> >   arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 15 +++++++++++++++
> >   1 file changed, 15 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
> > index 4704a93..6b38fa1 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
> > @@ -594,6 +594,21 @@
> >                   */
> >                  bias-pull-up;
> >          };
> > +
> > +       wcd938x_reset_active: wcd938x_reset_active {
> No underscore in node names.
Okay. will remove it.
> > +                       pins = "gpio83";
> > +                       function = "gpio";
> > +                       drive-strength = <16>;
> > +                       output-high;
> > +       };
> > +
> > +       wcd938x_reset_sleep: wcd938x_reset_sleep {
> > +                       pins = "gpio83";
> > +                       function = "gpio";
> > +                       drive-strength = <16>;
> > +                       bias-disable;
> > +                       output-low;
> Why doesn't the device drive the reset gpio by requesting the gpio and
> asserting and deasserting it? We shouldn't need to use pinctrl settings
> to toggle reset gpios.
Okay. Verified without these nodes and didn't see any impact. But 
similar way it's mentioned in sm8250-mtp.dts. Could You please suggest 
on it how to go ahead on this?.