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Date: Wed, 15 Dec 2021 18:31:41 -0800
From: Matthias Kaehlcke <mka@...omium.org>
To: Stephen Boyd <swboyd@...omium.org>
Cc: Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH] arm64: dts: sc7180: Add board regulators for MIPI camera
trogdor boards
On Tue, Dec 14, 2021 at 04:36:38PM -0800, Stephen Boyd wrote:
> Some trogdor boards have on-board regulators for the MIPI camera
> components. Add nodes describing these regulators so boards with these
> supplies can consume them.
>
> Cc: Douglas Anderson <dianders@...omium.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---
> .../boot/dts/qcom/sc7180-trogdor-coachz.dtsi | 16 +++
> .../dts/qcom/sc7180-trogdor-homestar.dtsi | 16 +++
> arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 122 ++++++++++++++++++
> 3 files changed, 154 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> index 14ed09f30a73..c81805ef2250 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> @@ -142,6 +142,22 @@ skin-temp-thermistor@1 {
> };
> };
>
> +&pp1800_uf_cam {
> + status = "okay";
> +};
> +
> +&pp1800_wf_cam {
> + status = "okay";
> +};
> +
> +&pp2800_uf_cam {
> + status = "okay";
> +};
> +
> +&pp2800_wf_cam {
> + status = "okay";
> +};
> +
> &pp3300_dx_edp {
> gpio = <&tlmm 67 GPIO_ACTIVE_HIGH>;
> };
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi
> index 4ab890b2a1d4..9110fed291c4 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-homestar.dtsi
> @@ -149,6 +149,22 @@ skin-temp-thermistor@1 {
> };
> };
>
> +&pp1800_uf_cam {
> + status = "okay";
> +};
> +
> +&pp1800_wf_cam {
> + status = "okay";
> +};
> +
> +&pp2800_uf_cam {
> + status = "okay";
> +};
> +
> +&pp2800_wf_cam {
> + status = "okay";
> +};
> +
> &pp3300_dx_edp {
> gpio = <&tlmm 67 GPIO_ACTIVE_HIGH>;
> };
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> index d4f4441179fc..1dd8e35093a8 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> @@ -113,6 +113,40 @@ src_vph_pwr: src-vph-pwr-regulator {
> vin-supply = <&ppvar_sys>;
> };
>
> + pp1800_uf_cam: pp1800-uf-cam-regulator {
> + compatible = "regulator-fixed";
> + regulator-name = "pp1800_uf_cam";
> + status = "disabled";
> +
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> +
> + gpio = <&tlmm 6 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + pinctrl-names = "default";
> + pinctrl-0 = <&uf_cam_en>;
> +
> + vin-supply = <&pp1800_ldo>;
> + regulator-enable-ramp-delay = <1000>;
> + };
> +
> + pp1800_wf_cam: pp1800-wf-cam-regulator {
> + compatible = "regulator-fixed";
> + regulator-name = "pp1800_wf_cam";
> + status = "disabled";
> +
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> +
> + gpio = <&tlmm 7 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + pinctrl-names = "default";
> + pinctrl-0 = <&wf_cam_en>;
> +
> + vin-supply = <&pp1800_ldo>;
> + regulator-enable-ramp-delay = <1000>;
> + };
> +
Shouldn't 'pp1800_ldo' be defined before these ("FIXED REGULATORS
- parents above children")?
I suggest to move these two below the top level regulators, i.e.
somwhere after pp3300_a (probably pp3300_a and pp5000_a should be
swapped, but that's beyond the scope of this patch).
> pp5000_a: pp5000-a-regulator {
> compatible = "regulator-fixed";
> regulator-name = "pp5000_a";
> @@ -144,6 +178,66 @@ pp3300_a: pp3300-a-regulator {
> vin-supply = <&ppvar_sys>;
> };
>
> + pp1800_ec:
> + pp1800_sensors:
> + pp1800_ldo: pp1800-ldo-regulator {
> + compatible = "regulator-fixed";
> + regulator-name = "pp1800_ldo";
> +
> + /* EC turns on with hibernate_l; always on for AP */
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> +
> + /*
> + * Actually should be pp1800_h1 but we don't have any need to
> + * model that so we use the parent of pp1800_h1.
> + */
> + vin-supply = <&pp3300_a>;
> + };
> +
> + pp2800_uf_cam: pp2800-uf-cam-regulator {
> + compatible = "regulator-fixed";
> + regulator-name = "pp2800_uf_cam";
> + status = "disabled";
> +
> + regulator-min-microvolt = <2850000>;
> + regulator-max-microvolt = <2850000>;
> +
> + gpio = <&tlmm 6 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + /*
> + * The pinconf can only be referenced once so we put it on the
> + * first regulator and comment it out here.
> + * pinctrl-names = "default";
> + * pinctrl-0 = <&uf_cam_en>;
> + */
> +
> + vin-supply = <&pp3300_a>;
> + };
> +
> + pp2800_vcm_wf_cam:
> + pp2800_wf_cam: pp2800-wf-cam-regulator {
> + compatible = "regulator-fixed";
> + regulator-name = "pp2800_wf_cam";
> + status = "disabled";
> +
> + regulator-min-microvolt = <2850000>;
> + regulator-max-microvolt = <2850000>;
> +
> + gpio = <&tlmm 7 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + /*
> + * The pinconf can only be referenced once so we put it on the
> + * first regulator and comment it out here.
> + * pinctrl-names = "default";
> + * pinctrl-0 = <&wf_cam_en>;
> + */
> +
> + vin-supply = <&pp3300_a>;
> + };
> +
> pp3300_audio:
> pp3300_codec: pp3300-codec-regulator {
> compatible = "regulator-fixed";
> @@ -1517,4 +1611,32 @@ pinconf-sd-cd {
> drive-strength = <2>;
> };
> };
> +
> + uf_cam_en: uf-cam-en {
> + pinmux {
> + pins = "gpio6";
> + function = "gpio";
> + };
> +
> + pinconf {
> + pins = "gpio6";
> + drive-strength = <2>;
> + /* External pull down */
Is there actually an external pull down?
> + bias-disable;
> + };
> + };
> +
> + wf_cam_en: wf-cam-en {
> + pinmux {
> + pins = "gpio7";
> + function = "gpio";
> + };
> +
> + pinconf {
> + pins = "gpio7";
> + drive-strength = <2>;
> + /* External pull down */
ditto
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