linux-kernel - Re: [PATCH 07/17] arm64: dts: exynos: gs101: Add ufs, ufs-phy and ufs regulator dt nodes

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Date: Fri, 5 Apr 2024 09:53:10 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Peter Griffin <peter.griffin@...aro.org>, mturquette@...libre.com,
 sboyd@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 vkoul@...nel.org, kishon@...nel.org, alim.akhtar@...sung.com,
 avri.altman@....com, bvanassche@....org, s.nawrocki@...sung.com,
 cw00.choi@...sung.com, jejb@...ux.ibm.com, martin.petersen@...cle.com,
 chanho61.park@...sung.com, ebiggers@...nel.org
Cc: linux-scsi@...r.kernel.org, linux-phy@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, tudor.ambarus@...aro.org,
 andre.draszik@...aro.org, saravanak@...gle.com, willmcvicker@...gle.com
Subject: Re: [PATCH 07/17] arm64: dts: exynos: gs101: Add ufs, ufs-phy and ufs
 regulator dt nodes

On 04/04/2024 14:25, Peter Griffin wrote:
> Enable the ufs controller, ufs phy and ufs regulator in device tree.
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> ---
>  .../boot/dts/exynos/google/gs101-oriole.dts   | 17 +++++++++
>  arch/arm64/boot/dts/exynos/google/gs101.dtsi  | 35 +++++++++++++++++++

If you wish you can split DTSI and DTS into separate patches. Up to you.

>  2 files changed, 52 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
> index 6be15e990b65..986eb5c9898a 100644
> --- a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
> +++ b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
> @@ -53,6 +53,14 @@ button-power {
>  			wakeup-source;
>  		};
>  	};
> +
> +	ufs_0_fixed_vcc_reg: regulator-0 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "ufs-vcc";
> +		gpio = <&gpp0 1 0>;

Use defines for GPIO flags, but more important: are you sure this is not
coming from a PMIC? What's the voltage? It looks like a stub for missing
PMIC, because UFS voltages are usually provided by PMIC.

> +		regulator-boot-on;
> +		enable-active-high;
> +	};
>  };
>  
>  &ext_24_5m {
> @@ -106,6 +114,15 @@ &serial_0 {
>  	status = "okay";
>  };
>  
> +&ufs_0 {
> +	status = "okay";
> +	vcc-supply = <&ufs_0_fixed_vcc_reg>;
> +};
> +
> +&ufs_0_phy {
> +	status = "okay";
> +};
> +
>  &usi_uart {
>  	samsung,clkreq-on; /* needed for UART mode */
>  	status = "okay";
> diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
> index 608369cec47b..9c94829bf14c 100644
> --- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
> +++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
> @@ -1277,6 +1277,41 @@ pinctrl_hsi2: pinctrl@...40000 {
>  			interrupts = <GIC_SPI 503 IRQ_TYPE_LEVEL_HIGH 0>;
>  		};
>  
> +		ufs_0_phy: phy@...04000 {
> +			compatible = "google,gs101-ufs-phy";
> +			reg = <0x14704000 0x3000>;
> +			reg-names = "phy-pma";
> +			samsung,pmu-syscon = <&pmu_system_controller>;
> +			#phy-cells = <0>;
> +			clocks = <&ext_24_5m>;
> +			clock-names = "ref_clk";
> +			status = "disabled";
> +		};
> +
> +		ufs_0: ufs@...00000 {
> +			compatible = "google,gs101-ufs";
> +

Drop blank line.

> +			reg = <0x14700000 0x200>,
> +			      <0x14701100 0x200>,
> +			      <0x14780000 0xa000>,
> +			      <0x14600000 0x100>;


Best regards,
Krzysztof