linux-kernel - Re: [PATCH v9 2/2] arm64: dts: qcom: sc7280: add lpass lpi pin controller node

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Date:   Wed, 13 Apr 2022 10:25:26 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, robh+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_rohkumar@...cinc.com,
        srinivas.kandagatla@...aro.org, dianders@...omium.org,
        swboyd@...omium.org, judyhsiao@...omium.org,
        Venkata Prasad Potturu <quic_potturu@...cinc.com>
Subject: Re: [PATCH v9 2/2] arm64: dts: qcom: sc7280: add lpass lpi pin
 controller node

On Wed, Apr 13, 2022 at 08:14:07PM +0530, Srinivasa Rao Mandadapu wrote:
> Add LPASS LPI pinctrl node required for Audio functionality on sc7280
> based platforms.
> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Co-developed-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
> Signed-off-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/sc7280-idp.dtsi |  84 ++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi     | 107 +++++++++++++++++++++++++++++++
>  2 files changed, 191 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 6e6cfeda..50fea0e 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -1987,6 +1987,113 @@
>  			qcom,bcm-voters = <&apps_bcm_voter>;
>  		};
>  
> +		lpass_tlmm: pinctrl@...0000 {
> +			compatible = "qcom,sc7280-lpass-lpi-pinctrl";
> +			reg = <0 0x033c0000 0x0 0x20000>,
> +				<0 0x03550000 0x0 0x10000>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			gpio-ranges = <&lpass_tlmm 0 0 15>;
> +
> +			#clock-cells = <1>;
> +
> +			lpass_dmic01: lpass-dmic01 {

For the node names the 'lpass-' prefix is redundant as you remarked
earlier, since they are inside the 'lpass_tlmm' node. It's only useful
for the labels, which can be used in other .dts[i] files where the
context might not be evident.