linux-kernel - Re: [PATCH v3 6/7] arm64: dts: exynos: gs101: define USI12 with I2C configuration

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Date: Tue, 30 Jan 2024 15:01:39 -0800
From: William McVicker <willmcvicker@...gle.com>
To: André Draszik <andre.draszik@...aro.org>
Cc: peter.griffin@...aro.org, mturquette@...libre.com, sboyd@...nel.org,
	robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org, linux-kernel@...r.kernel.org,
	kernel-team@...roid.com, tudor.ambarus@...aro.org,
	semen.protsenko@...aro.org, alim.akhtar@...sung.com,
	s.nawrocki@...sung.com, tomasz.figa@...il.com,
	cw00.choi@...sung.com, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3 6/7] arm64: dts: exynos: gs101: define USI12 with I2C
 configuration

Hi Andre,

On 01/29/2024, André Draszik wrote:
> On the gs101-oriole board, i2c bus 12 has various USB-related
> controllers attached to it.
> 
> Note the selection of the USI protocol is intentionally left for the
> board dts file.
> 
> Signed-off-by: André Draszik <andre.draszik@...aro.org>
> Reviewed-by: Sam Protsenko <semen.protsenko@...aro.org>
> 
> ---
> v2:
> * reorder pinctrl-0 & pinctrl-names
> * collect Reviewed-by: tags
> ---
>  arch/arm64/boot/dts/exynos/google/gs101.dtsi | 30 ++++++++++++++++++++
>  1 file changed, 30 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
> index e1bcf490309a..9876ecae0ad8 100644
> --- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
> +++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
> @@ -451,6 +451,36 @@ pinctrl_peric1: pinctrl@...40000 {
>  			interrupts = <GIC_SPI 644 IRQ_TYPE_LEVEL_HIGH 0>;
>  		};
>  
> +		usi12: usi@...500c0 {
> +			compatible = "google,gs101-usi",
> +				     "samsung,exynos850-usi";
> +			reg = <0x10d500c0 0x20>;
> +			ranges;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			clocks = <&cmu_peric1 CLK_GOUT_PERIC1_PERIC1_TOP0_PCLK_5>,
> +				 <&cmu_peric1 CLK_GOUT_PERIC1_PERIC1_TOP0_IPCLK_5>;
> +			clock-names = "pclk", "ipclk";
> +			samsung,sysreg = <&sysreg_peric1 0x1010>;
> +			samsung,mode = <USI_V2_NONE>;
> +			status = "disabled";
> +
> +			hsi2c_12: i2c@...50000 {
> +				compatible = "google,gs101-hsi2c",
> +					     "samsung,exynosautov9-hsi2c";
> +				reg = <0x10d50000 0xc0>;
> +				interrupts = <GIC_SPI 655 IRQ_TYPE_LEVEL_HIGH 0>;
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				pinctrl-0 = <&hsi2c12_bus>;
> +				pinctrl-names = "default";
> +				clocks = <&cmu_peric1 CLK_GOUT_PERIC1_PERIC1_TOP0_IPCLK_5>,
> +					 <&cmu_peric1 CLK_GOUT_PERIC1_PERIC1_TOP0_PCLK_5>;
> +				clock-names = "hsi2c", "hsi2c_pclk";
> +				status = "disabled";
> +			};

Can you include the i2c aliases for hsi2c_12 and hsi2c_8 (added by Tudor
previously)? This will ensure userspace compatibility with the existing Pixel
userspace builds.

Feel free to do so in a follow-up patch, but I'd prefer the aliases get
included in the same kernel release that these devices were added in (v6.9).

Thanks,
Will

> +		};
> +
>  		pinctrl_hsi1: pinctrl@...40000 {
>  			compatible = "google,gs101-pinctrl";
>  			reg = <0x11840000 0x00001000>;
> -- 
> 2.43.0.429.g432eaa2c6b-goog
>