linux-kernel - Re: [PATCH] ARM: dts: OMAP5: Add i2c aliases

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Date:	Wed, 16 Oct 2013 17:07:42 +0530
From:	Rajendra Nayak <rnayak@...com>
To:	Nishanth Menon <nm@...com>
CC:	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>, <devicetree@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: dts: OMAP5: Add i2c aliases

On Tuesday 15 October 2013 10:30 PM, Nishanth Menon wrote:
> Currently, i2c1 and i2c5 defer probe due to pinctrl dependencies.
> This changes the i2c ID each bus is registered with in i2c-dev
> interface.
> 
> As a result of this, many userspace tools break and there is no
> consistent manner to fix the same if the i2c dev interface have no
> consistent numbering. Provide alias to allow ordering the i2c devices
> correctly.

This looks good Nishanth. Shouldn't we just go ahead and fix these for
all OMAPs/AMxx devices which would have the same problem as OMAP5 ;)

Acked-by: Rajendra Nayak <rnayak@...com> 
> 
> Signed-off-by: Nishanth Menon <nm@...com>
> ---
> 
>  arch/arm/boot/dts/omap5.dtsi |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
> index e18ee7e..8970deb 100644
> --- a/arch/arm/boot/dts/omap5.dtsi
> +++ b/arch/arm/boot/dts/omap5.dtsi
> @@ -21,6 +21,11 @@
>  	interrupt-parent = <&gic>;
>  
>  	aliases {
> +		i2c0 = &i2c1;
> +		i2c1 = &i2c2;
> +		i2c2 = &i2c3;
> +		i2c3 = &i2c4;
> +		i2c4 = &i2c5;
>  		serial0 = &uart1;
>  		serial1 = &uart2;
>  		serial2 = &uart3;
> 

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