Re: [PATCH 5/5 v3] ARM: at91: sam9x5 add i2c DT support

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On 03/08/2012 02:50 AM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> For now on use i2c-gpio driver on the same pin as the hardware IP.
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
> Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
> Cc: devicetree-discuss@xxxxxxxxxxxxxxxx
> ---
> v3:
> 
> 	update i2c binding (Rob comments)
> 
> Best Regards,
> J.
>  arch/arm/boot/dts/at91sam9x5.dtsi |   39 +++++++++++++++++++++++++++++++++++++
>  1 files changed, 39 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi
> index c294657..fdd1ac6 100644
> --- a/arch/arm/boot/dts/at91sam9x5.dtsi
> +++ b/arch/arm/boot/dts/at91sam9x5.dtsi
> @@ -188,4 +188,43 @@
>  			status = "disabled";
>  		};
>  	};
> +
> +	i2c-gpio@0 {
> +		compatible = "i2c-gpio";
> +		gpios = <&pioA 30 0 /* sda */
> +			 &pioA 31 0 /* scl */
> +			>;
> +		i2c-gpio,sda-open-drain;
> +		i2c-gpio,scl-open-drain;
> +		i2c-gpio,delay-us = <2>;	/* ~100 kHz */
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		status = "disabled";
> +	};
> +
> +	i2c-gpio@1 {
> +		compatible = "i2c-gpio";
> +		gpios = <&pioC 0 0 /* sda */
> +			 &pioC 1 0 /* scl */
> +			>;
> +		i2c-gpio,sda-open-drain;
> +		i2c-gpio,scl-open-drain;
> +		i2c-gpio,delay-us = <2>;	/* ~100 kHz */
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		status = "disabled";
> +	};
> +
> +	i2c-gpio@2 {
> +		compatible = "i2c-gpio";
> +		gpios = <&pioB 4 0 /* sda */
> +			 &pioB 5 0 /* scl */
> +			>;
> +		i2c-gpio,sda-open-drain;
> +		i2c-gpio,scl-open-drain;
> +		i2c-gpio,delay-us = <2>;	/* ~100 kHz */
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		status = "disabled";
> +	};

If these are just any random gpio lines, it seems strange to define
these in a SOC dtsi and then disable them.

Rob


>  };


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