linux-kernel - RE: [PATCH] arm64: dts: Added syscon-reboot node for FSL's LS2085A SoC

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Message-ID: <CY1PR0301MB07483CD5D8B23940A49816B687220@CY1PR0301MB0748.namprd03.prod.outlook.com>
Date:	Tue, 27 Oct 2015 16:31:16 +0000
From:	Stuart Yoder <stuart.yoder@...escale.com>
To:	Jose Rivera <German.Rivera@...escale.com>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Sharma Bhupesh <bhupesh.sharma@...escale.com>,
	Li Leo <LeoLi@...escale.com>,
	Jose Rivera <German.Rivera@...escale.com>
Subject: RE: [PATCH] arm64: dts: Added syscon-reboot node for FSL's LS2085A
 SoC



> -----Original Message-----
> From: J. German Rivera [mailto:German.Rivera@...escale.com]
> Sent: Friday, October 23, 2015 8:31 PM
> To: robh+dt@...nel.org; mark.rutland@....com; devicetree@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
> Cc: Sharma Bhupesh-B45370; Yoder Stuart-B08248; Li Yang-Leo-R58472; Rivera Jose-B46482
> Subject: [PATCH] arm64: dts: Added syscon-reboot node for FSL's LS2085A SoC
> 
> Added sys-reboot node to the FSL's LS2085A SoC DT to leverage
> the ARM-generic reboot mechanism for this SoC. This mechanism
> is enabled through CONFIG_POWER_RESET_SYSCON.
> 
> Signed-off-by: J. German Rivera <German.Rivera@...escale.com>
> ---
>  arch/arm64/boot/dts/freescale/fsl-ls2085a.dtsi | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls2085a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls2085a.dtsi
> index e281ceb..6f82163 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls2085a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls2085a.dtsi
> @@ -131,6 +131,18 @@
>  		interrupts = <1 9 0x4>;
>  	};
> 
> +	rst_ccsr: rstccsr@...0000 {
> +	        compatible = "syscon";
> +		reg = <0x0 0x1E60000 0x0 0x10000>;
> +	};
> +
> +	reboot@...24000 {
> +		compatible ="syscon-reboot";
> +		regmap = <&rst_ccsr>;
> +		offset = <0x0>;
> +		mask = <0x2>;
> +	};
> +

Drop the unit address "65024000", since you have no "reg" property.

The ePAPR explicitly says: "If the node has no reg property, the
@ and unit-address must be omitted and the node-name alone differentiates
the node from other nodes at the same level in the tree.

Also, other examples in the kernel just use plain "reboot" as
the name:

arch/arm/boot/dts/hisi-x5hd2.dtsi
arch/arm/boot/dts/vfxxx.dtsi
arch/mips/boot/dts/brcm/bcm6328.dtsi

Also, Bhupesh's LS2080A DTS updates were just accepte4d, and the device tree
name is no longer fsl-ls2085a.dtsi.  You need to rebase on top of
those changes.

Thanks,
Stuart
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