linux-kernel - Re: [PATCH V5 5/6] arm64: dts: qcom: pm8008: Add base dts file

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Date:   Wed, 9 Feb 2022 17:41:25 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Rob Herring <robh+dt@...nel.org>,
        Satya Priya <quic_c_skakit@...cinc.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Das Srinagesh <gurus@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_collinsd@...cinc.com,
        quic_subbaram@...cinc.com, quic_jprakash@...cinc.com
Subject: Re: [PATCH V5 5/6] arm64: dts: qcom: pm8008: Add base dts file

Quoting Satya Priya (2022-02-08 06:52:19)
> Add base DTS file for pm8008 with infra and regulator nodes.
>
> Signed-off-by: Satya Priya <quic_c_skakit@...cinc.com>
> ---
> Changes in V4:
>  - This is newly added in V4, to add all the pm8008 common stuff.
>
> Changes in V5:
>  - Changed the mfd node names from pm8008_chip to pm8008_infra and
>    pm8008_ldo to pm8008_regulators as they re more appropriate.
>  - Changed the compatible for pm8008@9 mfd node to differentiate from
>    pm8008@8 node in driver.
>  - Removed compatible for regulators node.
>  - Removed reg property for LDOs and added in driver.
>
>  arch/arm64/boot/dts/qcom/pm8008.dtsi | 46 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/pm8008.dtsi
>
> diff --git a/arch/arm64/boot/dts/qcom/pm8008.dtsi b/arch/arm64/boot/dts/qcom/pm8008.dtsi
> new file mode 100644
> index 0000000..8e04983
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/pm8008.dtsi
> @@ -0,0 +1,46 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +// Copyright (c) 2021, The Linux Foundation. All rights reserved.
> +
> +pm8008_infra: pm8008@8 {
> +       compatible = "qcom,pm8008";
> +       reg = <0x8>;
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +};
> +
> +pm8008_regulators: pm8008@9 {
> +       compatible = "qcom,pm8008-regulators";
> +       reg = <0x9>;
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +
> +       regulators {

What is the point of the 'regulators' node? Why can't we just put LDO1
directly underneath the node that has the "qcom,pm8008-regulators"
compatible?

> +               pm8008_l1: LDO1 {
> +                       regulator-name = "pm8008_l1";
> +               };
> +