linux-kernel - Re: [PATCH 1/2] arm64: dts: berlin4ct: add I2C nodes for BG4CT

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Date:	Fri, 20 Nov 2015 22:21:55 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Jisheng Zhang <jszhang@...vell.com>, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	catalin.marinas@....com, will.deacon@....com
Cc:	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dts: berlin4ct: add I2C nodes for BG4CT

On 20.11.2015 10:47, Jisheng Zhang wrote:
> The Marvell Berlin BG4CT SoC has 4 TWSI which are compatible with the
> Synopsys DesignWare I2C driver. Add the corresponding nodes.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
> ---
>  arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 52 ++++++++++++++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> index cca4c41..39d0676 100644
> --- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> +++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> @@ -232,6 +232,32 @@
>  				};
>  			};
>  
> +			i2c0: i2c@...0 {
> +				compatible = "snps,designware-i2c";
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				reg = <0x1400 0x100>;
> +				clocks = <&clk CLK_APBCORE>;

This patch looks fine to me, except that clock node naming and
clock indices may change. We should really postpone this series
until we worked out clock.

Sebastian

> +				i2c-sda-hold-time-ns = <35>;
> +				i2c-sda-falling-time-ns = <425>;
> +				i2c-scl-falling-time-ns = <205>;
> +				interrupts = <4>;
> +				status = "disabled";
> +			};
> +
> +			i2c1: i2c@...0 {
> +				compatible = "snps,designware-i2c";
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				reg = <0x1800 0x100>;
> +				clocks = <&clk CLK_APBCORE>;
> +				i2c-sda-hold-time-ns = <35>;
> +				i2c-sda-falling-time-ns = <425>;
> +				i2c-scl-falling-time-ns = <205>;
> +				interrupts = <5>;
> +				status = "disabled";
> +			};
> +
>  			aic: interrupt-controller@...0 {
>  				compatible = "snps,dw-apb-ictl";
>  				reg = <0x3800 0x30>;
> @@ -319,6 +345,32 @@
>  				};
>  			};
>  
> +			i2c2: i2c@...0 {
> +				compatible = "snps,designware-i2c";
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				reg = <0xb000 0x100>;
> +				clocks = <&osc>;
> +				i2c-sda-hold-time-ns = <140>;
> +				i2c-sda-falling-time-ns = <500>;
> +				i2c-scl-falling-time-ns = <220>;
> +				interrupts = <6>;
> +				status = "disabled";
> +			};
> +
> +			i2c3: i2c@...0 {
> +				compatible = "snps,designware-i2c";
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				reg = <0xc000 0x100>;
> +				clocks = <&osc>;
> +				i2c-sda-hold-time-ns = <140>;
> +				i2c-sda-falling-time-ns = <500>;
> +				i2c-scl-falling-time-ns = <220>;
> +				interrupts = <7>;
> +				status = "disabled";
> +			};
> +
>  			uart0: uart@...0 {
>  				compatible = "snps,dw-apb-uart";
>  				reg = <0xd000 0x100>;
> 

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