linux-kernel - Re: [PATCH v2] ARM: dts: am335x-bone-common: Add i2c2 definition

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Date:	Mon, 12 May 2014 12:50:50 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Matt Ranostay <mranostay@...il.com>
Cc:	robh+dt@...nel.org, mark.rutland@....com, linux@....linux.org.uk,
	linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, pantelis.antoniou@...il.com,
	matt.porter@...aro.org
Subject: Re: [PATCH v2] ARM: dts: am335x-bone-common: Add i2c2 definition

* Matt Ranostay <mranostay@...il.com> [140509 18:43]:
> Add missing i2c2 bus define to access various cape and
> prototype/breakout board devices.
> 
> Signed-off-by: Matt Ranostay <mranostay@...il.com>
> ---
>  arch/arm/boot/dts/am335x-bone-common.dtsi | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
> index 2e7d932..5fdae2e 100644
> --- a/arch/arm/boot/dts/am335x-bone-common.dtsi
> +++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
> @@ -84,6 +84,13 @@
>  		>;
>  	};
>  
> +	i2c2_pins: pinmux_i2c2_pins {
> +		pinctrl-single,pins = <
> +			0x178 (PIN_INPUT_PULLUP | MUX_MODE3)	/* uart1_ctsn.i2c2_sda */
> +			0x17c (PIN_INPUT_PULLUP | MUX_MODE3)	/* uart1_rtsn.i2c2_scl */
> +		>;
> +	};
> +
>  	uart0_pins: pinmux_uart0_pins {
>  		pinctrl-single,pins = <
>  			0x170 (PIN_INPUT_PULLUP | MUX_MODE0)	/* uart0_rxd.uart0_rxd */
>
> @@ -222,6 +229,15 @@
>  
>  };
>  
> +
> +&i2c2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2c2_pins>;
> +
> +	status = "okay";
> +	clock-frequency = <100000>;
> +};
> +

If these pins are not used for i2c2 on some capes, this device
should be set to status = "disabled" state by default. Then
u-boot could re-enable it on the boards that have i2c2 in use.

Regards,

Tony
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