linux-kernel - Re: [Patch V2 4/4] ARM: dts: AM33XX: update rtc node compatibility

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Message-ID: <20130730145501.GA29859@e106331-lin.cambridge.arm.com>
Date:	Tue, 30 Jul 2013 15:55:01 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Gururaja Hebbar <gururaja.hebbar@...com>
Cc:	"benoit.cousson@...aro.org" <benoit.cousson@...aro.org>,
	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"khilman@...aro.org" <khilman@...aro.org>,
	"tony@...mide.com" <tony@...mide.com>,
	"benoit.cousson@...il.com" <benoit.cousson@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"vaibhav.bedia@...com" <vaibhav.bedia@...com>,
	"sudhakar.raj@...com" <sudhakar.raj@...com>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [Patch V2 4/4] ARM: dts: AM33XX: update rtc node compatibility

On Tue, Jul 30, 2013 at 06:05:52AM +0100, Gururaja Hebbar wrote:
> Hi,
> 
> On 7/3/2013 2:17 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.
> 
> The other 2 rtc driver related patches have been pulled up. If you have 
> no comments, can you please pull this up.
> 
> Regards
> Gururaja
> 
> >
> > Signed-off-by: Hebbar Gururaja <gururaja.hebbar@...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";

Given that this is backwards compatible with the old binding, it would
be nicer to have this as:

	compatible = "ti,am3352-rtc", "ti,da830-rtc";

We must get into the habit of changing dts files in a
backwards-compatible fashion.

Thanks,
Mark.
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