linux-kernel - Re: [PATCH 5/5] arm64: dts: qcom: r0q: enable ufs storage

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Message-ID: <f032db60-d625-4814-a5c9-0610618b7351@oss.qualcomm.com>
Date: Thu, 25 Sep 2025 15:07:31 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Eric Gonçalves <ghatto404@...il.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] arm64: dts: qcom: r0q: enable ufs storage

On 9/20/25 3:46 AM, Eric Gonçalves wrote:
> Enable UFS internal storage of the Samsung Galaxy S22.
> 
> Signed-off-by: Eric Gonçalves <ghatto404@...il.com>
> ---
>  .../boot/dts/qcom/sm8450-samsung-r0q.dts      | 39 +++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts b/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts
> index c088f1acf6ea..0a55ce952f93 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts
> @@ -146,6 +146,24 @@ vreg_l5b_0p88: ldo5 {
>  			regulator-max-microvolt = <888000>;
>  			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
>  		};
> +
> +		vreg_l6b_1p2: ldo6 {
> +			regulator-min-microvolt = <1200000>;
> +			regulator-max-microvolt = <1200000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> +		};
> +
> +		vreg_l7b_2p5: ldo7 {
> +			regulator-min-microvolt = <2504000>;
> +			regulator-max-microvolt = <2504000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> +		};
> +
> +		vreg_l9b_1p2: ldo9 {
> +			regulator-min-microvolt = <1200000>;
> +			regulator-max-microvolt = <1200000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> +		};
>  	};
>  
>  	regulators-1 {
> @@ -370,6 +388,27 @@ tsp_int_sleep: tsp_int_sleep_state {
>  	};
>  };
>  
> +&ufs_mem_hc {
> +	reset-gpios = <&tlmm 210 GPIO_ACTIVE_LOW>;
> +
> +	vcc-supply = <&vreg_l7b_2p5>;
> +	vcc-max-microamp = <1100000>;

because you set this, you should also set regulator-allow-set-mode and
regulator-allowed-modes

Konrad