linux-kernel - Re: [PATCH 4/4] ARM: dts: AM33XX: update rtc node compatibility

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Message-ID: <51D26F61.7080308@ti.com>
Date:	Tue, 2 Jul 2013 11:42:49 +0530
From:	Sekhar Nori <nsekhar@...com>
To:	Hebbar Gururaja <gururaja.hebbar@...com>
CC:	<khilman@...aro.org>, <tony@...mide.com>,
	Benoît Cousson <benoit.cousson@...il.com>,
	<linux-omap@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<davinci-linux-open-source@...ux.davincidsp.com>,
	<vaibhav.bedia@...com>, <sudhakar.raj@...com>
Subject: Re: [PATCH 4/4] ARM: dts: AM33XX: update rtc node compatibility

Changing to Benoit's gmail id since he apparently wont access TI mail
anymore.

On 6/28/2013 3:05 PM, Hebbar Gururaja wrote:
> Since AM33xx  RTC IP has RTC_IRQWAKEEN to support Alarm Wake-up.
> 
> Update the rtc compatible property to "ti,am3352-rtc" to enable handling
> of this feature inside rtc-omap driver.
> 
> Signed-off-by: Hebbar Gururaja <gururaja.hebbar@...com>
> Cc: Tony Lindgren <tony@...mide.com>
> Cc: Sekhar Nori <nsekhar@...com>
> Cc: Kevin Hilman <khilman@...aro.org>
> Cc: b-cousson@...com
> ---
> :100644 100644 77aa1b0... dde180a... M	arch/arm/boot/dts/am33xx.dtsi
>  arch/arm/boot/dts/am33xx.dtsi |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> index 77aa1b0..dde180a 100644
> --- a/arch/arm/boot/dts/am33xx.dtsi
> +++ b/arch/arm/boot/dts/am33xx.dtsi
> @@ -297,7 +297,7 @@
>  		};
>  
>  		rtc@...3e000 {
> -			compatible = "ti,da830-rtc";
> +			compatible = "ti,am3352-rtc";

compatible is a list so you can instead do:
	
	compatible = "ti,am3352-rtc", "ti,da830-rtc";

That way the dts works irrespective of driver updates. When driver
supports enhanced features of hardware, they are available to the user
else the basic functionality still works.

Thanks,
Sekhar
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