linux-kernel - Re: [PATCH v2 1/3] arm64: dts: qcom: sc7280: Add pinmux for I2S speaker and Headset

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Date:   Wed, 9 Feb 2022 16:07:33 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>,
        agross@...nel.org, bjorn.andersson@...aro.org,
        devicetree@...r.kernel.org, dianders@...omium.org,
        judyhsiao@...omium.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        rohitkr@...eaurora.org, srinivas.kandagatla@...aro.org
Cc:     Venkata Prasad Potturu <quic_potturu@...cinc.com>
Subject: Re: [PATCH v2 1/3] arm64: dts: qcom: sc7280: Add pinmux for I2S
 speaker and Headset

Quoting Srinivasa Rao Mandadapu (2022-02-09 05:42:40)
>
> On 2/9/2022 2:38 AM, Stephen Boyd wrote:
> > Quoting Srinivasa Rao Mandadapu (2022-02-08 07:34:12)
> >>   &qspi_cs0 {
> >>          bias-disable;
> >> @@ -491,6 +524,13 @@
> >>   };
> >>
> >>   &tlmm {
> >> +       amp_en: amp-en {
> >> +               pins = "gpio63";
> >> +               function = "gpio";
> >> +               bias-disable;
> > Is there an external pull?
> I think no external pull. In trogdor mentioned bias-pull-down but you
> suggested to remove it.

Maybe on trogdor there was an external pull inside the amp that this pin
is connected to? Usually we have a comment like /* Has external
pull-{up,down} */ so please add that here depending on which way the
pull goes.