linux-kernel - Re: [PATCH v3 2/6] ARM: dts: rockchip: use the same pmu node name as before

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Date:	Sat, 11 Oct 2014 19:43:08 +0200
From:	Heiko Stübner <heiko@...ech.de>
To:	Kever Yang <kever.yang@...k-chips.com>
Cc:	dianders@...omium.org, sonnyrao@...omium.org,
	addy.ke@...k-chips.com, cf@...k-chips.com, xjq@...k-chips.com,
	hj@...k-chips.com, huangtao@...k-chips.com,
	linux-rockchip@...ts.infradead.org,
	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
Subject: Re: [PATCH v3 2/6] ARM: dts: rockchip: use the same pmu node name as before

Am Freitag, 10. Oktober 2014, 14:26:06 schrieb Kever Yang:
> We use the "rockchip,rk3066-pmu" for rk3288 instead of creat
> a new one.

No, it should stay keep the rk3288-pmu compatible. While the 4 powerdomains 
for the cores are similar, the pmu in general is very much specific to the 
rk3288.

Also, this renaming of the pmu compatible only is a workaround for the 
underlying problem, that your tree is probably missing the early syscon 
support and there falling back to mapping the node directly.

If you apply the patch 
	[PATCH v7] mfd: syscon: Decouple syscon interface from platform devices
to your tree, it will work as expected by really using the pmu reference from 
patch3 - it did for me - making this patch unnecessary.


Heiko

> 
> Signed-off-by: Kever Yang <kever.yang@...k-chips.com>
> ---
> 
> Changes in v3:
> - add this patch in version 3
> 
> Changes in v2: None
> 
>  arch/arm/boot/dts/rk3288.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> index 874e66d..06f39be 100644
> --- a/arch/arm/boot/dts/rk3288.dtsi
> +++ b/arch/arm/boot/dts/rk3288.dtsi
> @@ -440,7 +440,7 @@
>  	};
> 
>  	pmu: power-management@...30000 {
> -		compatible = "rockchip,rk3288-pmu", "syscon";
> +		compatible = "rockchip,rk3066-pmu", "syscon";
>  		reg = <0xff730000 0x100>;
>  	};

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