linux-kernel - Re: [Patch] ARM: dts: keystone: add pll controller syscon entry

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Message-ID: <537CEE13.5040908@cogentembedded.com>
Date:	Wed, 21 May 2014 22:18:59 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>, santosh.shilimkar@...com
CC:	devicetree@...r.kernel.org, grygorii.strashko@...com,
	linux@....linux.org.uk, linux-kernel@...r.kernel.org,
	robh+dt@...nel.org, m-karicheri2@...com, galak@...eaurora.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [Patch] ARM: dts: keystone: add pll controller syscon entry

Hello.

On 05/21/2014 06:17 PM, Ivan Khoronzhuk wrote:

> The pll controller register set includes sets of registers with
> different purposes, so it's logically to add syscon entry to be able
> to access them from appropriate places.

> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
> ---

> Based on linux-next/master

>   arch/arm/boot/dts/keystone.dtsi | 5 +++++
>   1 file changed, 5 insertions(+)

> diff --git a/arch/arm/boot/dts/keystone.dtsi b/arch/arm/boot/dts/keystone.dtsi
> index d9f99e7..5e67c5b 100644
> --- a/arch/arm/boot/dts/keystone.dtsi
> +++ b/arch/arm/boot/dts/keystone.dtsi
> @@ -66,6 +66,11 @@
>   		ranges = <0x0 0x0 0x0 0xc0000000>;
>   		dma-ranges = <0x80000000 0x8 0x00000000 0x80000000>;
>
> +		pllctrl: pll_controller {

   I think it's better to follow the pattern established by "reset-controller" 
and use hyphen ISO dash in the node name. This is also a common practice to 
use hyphens in the device trees overall.

> +			compatible = "ti,keystone-pllctrl", "syscon";
> +			reg = <0x2310000 0x200>;
> +		};
> +
>   		rstctrl: reset-controller {
>   			compatible = "ti,keystone-reset";
>   			reg = <0x023100e8 4>;	/* pll reset control reg */
>

WBR, Sergei

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