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Message-ID: <b6866ee4-31d9-4404-9bd9-92bc4ab59b8c@linaro.org>
Date: Thu, 21 Dec 2023 13:51:58 +0100
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Subject: Re: [PATCH 6/8] arm64: dts: qcom: sa8295p-adp: add max20411
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To: Bjorn Andersson <quic_bjorande@quicinc.com>,
 Bjorn Andersson <andersson@kernel.org>,
 Michael Turquette <mturquette@baylibre.com>, Stephen Boyd
 <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>, Taniya Das <quic_tdas@quicinc.com>,
 Ulf Hansson <ulf.hansson@linaro.org>, Johan Hovold
 <johan+linaro@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>,
 Will Deacon <will@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
References: <20231220-sa8295p-gpu-v1-0-d8cdf2257f97@quicinc.com>
 <20231220-sa8295p-gpu-v1-6-d8cdf2257f97@quicinc.com>
From: Konrad Dybcio <konrad.dybcio@linaro.org>
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In-Reply-To: <20231220-sa8295p-gpu-v1-6-d8cdf2257f97@quicinc.com>
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On 21.12.2023 04:50, Bjorn Andersson wrote:
> From: Bjorn Andersson <andersson@kernel.org>
> 
> The SA8295P ADP has a MAX20411 LDO regulator on I2C 12, supplying the
> VDD_GFX pads. Enable the bus and add the maxim,max20411 device on the
> bus.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/sa8295p-adp.dts | 40 ++++++++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sa8295p-adp.dts b/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
> index fd253942e5e5..e16406c9c19d 100644
> --- a/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
> +++ b/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
> @@ -266,6 +266,26 @@ &dispcc1 {
>  	status = "okay";
>  };
>  
> +&i2c12 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&qup1_i2c4_state>;
property-n
property-names

(same below)
> +
> +	status = "okay";
> +
> +	vdd_gfx: regulator@39 {
> +		compatible = "maxim,max20411";
> +		reg = <0x39>;
> +
> +		regulator-min-microvolt = <800000>;
> +		regulator-max-microvolt = <968750>;
Is this ever going to be scaled? I suppose you could add some OPP code to
drm/msm and use opp-microvolts.. Or lock this down at min=max

Konrad