linux-kernel - Re: [PATCH 1/2] arm: mvebu: disable unused Armada RTC on ReadyNAS 102, 104 and 2120

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Date:	Mon, 12 Oct 2015 16:21:12 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Arnaud Ebalard <arno@...isbad.org>
Cc:	Jason Cooper <jason@...edaemon.net>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, TuxOholic <tuxoholic@...mail.de>
Subject: Re: [PATCH 1/2] arm: mvebu: disable unused Armada RTC on ReadyNAS
 102, 104 and 2120

On Sat, Oct 10, 2015 at 12:10:24AM +0200, Arnaud Ebalard wrote:
> 
> By default, armada-370-xp.dtsi file has internal RTC enabled.
> NETGEAR ReadyNAS 102, 104 and 2120 all use an Intersil ISL12057
> I2C RTC chip. The internal RTC not being disabled in the .dts
> files of those devices result in the following useless first
> line during boot:
> 
> [    4.500056] rtc-mv d0010300.rtc: internal RTC not ticking
> [    4.505684] i2c /dev entries driver
> [    4.513246] rtc-isl12057 0-0068: rtc core: registered rtc-isl12057 as rtc0
> 
> This patch marks Armada internal RTC as disabled in individual .dts
> files of those devices.
> 
> Reported-by: TuxOholic <tuxoholic@...mail.de>
> Signed-off-by: Arnaud Ebalard <arno@...isbad.org>

Acked-by: Andrew Lunn <andrew@...n.ch>

Thanks Arnaud

       Andrew


> ---
>  arch/arm/boot/dts/armada-370-netgear-rn102.dts | 6 ++++++
>  arch/arm/boot/dts/armada-370-netgear-rn104.dts | 6 ++++++
>  arch/arm/boot/dts/armada-xp-netgear-rn2120.dts | 6 ++++++
>  3 files changed, 18 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/armada-370-netgear-rn102.dts b/arch/arm/boot/dts/armada-370-netgear-rn102.dts
> index a31207860f34..5851964196bd 100644
> --- a/arch/arm/boot/dts/armada-370-netgear-rn102.dts
> +++ b/arch/arm/boot/dts/armada-370-netgear-rn102.dts
> @@ -82,6 +82,12 @@
>  		};
>  
>  		internal-regs {
> +
> +			/* RTC is provided by Intersil ISL12057 I2C RTC chip */
> +			rtc@...00 {
> +				status = "disabled";
> +			};
> +
>  			serial@...00 {
>  				status = "okay";
>  			};
> diff --git a/arch/arm/boot/dts/armada-370-netgear-rn104.dts b/arch/arm/boot/dts/armada-370-netgear-rn104.dts
> index 00540f292979..b0b07ba677b9 100644
> --- a/arch/arm/boot/dts/armada-370-netgear-rn104.dts
> +++ b/arch/arm/boot/dts/armada-370-netgear-rn104.dts
> @@ -82,6 +82,12 @@
>  		};
>  
>  		internal-regs {
> +
> +			/* RTC is provided by Intersil ISL12057 I2C RTC chip */
> +			rtc@...00 {
> +				status = "disabled";
> +			};
> +
>  			serial@...00 {
>  				status = "okay";
>  			};
> diff --git a/arch/arm/boot/dts/armada-xp-netgear-rn2120.dts b/arch/arm/boot/dts/armada-xp-netgear-rn2120.dts
> index 1516fc2627f9..85b2f87c0b8a 100644
> --- a/arch/arm/boot/dts/armada-xp-netgear-rn2120.dts
> +++ b/arch/arm/boot/dts/armada-xp-netgear-rn2120.dts
> @@ -88,6 +88,12 @@
>  		};
>  
>  		internal-regs {
> +
> +			/* RTC is provided by Intersil ISL12057 I2C RTC chip */
> +			rtc@...00 {
> +				status = "disabled";
> +			};
> +
>  			/* Two rear eSATA ports */
>  			sata@...00 {
>  				nr-ports = <2>;
> -- 
> 2.5.3
> 
> 
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