linux-kernel - Re: [PATCH v2 4/5] ARM: dts: sun9i: Add A80 PRCM clocks and reset control nodes

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Message-ID: <20150504130546.GC3274@lukather>
Date:	Mon, 4 May 2015 15:05:46 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Mike Turquette <mturquette@...aro.org>,
	Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/5] ARM: dts: sun9i: Add A80 PRCM clocks and reset
 control nodes

On Fri, May 01, 2015 at 12:10:05AM +0800, Chen-Yu Tsai wrote:
> This adds the PRCM clocks and reset controls to the A80 dtsi.
> 
> The list of apbs clock gates is incomplete. Tests show that bits 0~20
> are mutable. We will need documents from Allwinner to complete the
> support.
> 
> Also update clock and reset phandles for r_uart.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>  arch/arm/boot/dts/sun9i-a80.dtsi | 64 +++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 63 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi b/arch/arm/boot/dts/sun9i-a80.dtsi
> index d3dece2eea72..f0869ff8006f 100644
> --- a/arch/arm/boot/dts/sun9i-a80.dtsi
> +++ b/arch/arm/boot/dts/sun9i-a80.dtsi
> @@ -169,6 +169,14 @@
>  					     "usb_phy2", "usb_hsic_12M";
>  		};
>  
> +		pll3: clk@...00008 {
> +			/* placeholder until implemented */
> +			#clock-cells = <0>;
> +			compatible = "fixed-clock";
> +			clock-rate = <0>;
> +			clock-output-names = "pll3";
> +		};
> +
>  		pll4: clk@...0000c {
>  			#clock-cells = <0>;
>  			compatible = "allwinner,sun9i-a80-pll4-clk";
> @@ -751,13 +759,67 @@
>  			interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
>  		};
>  
> +		prcm@...01400 {
> +			compatible = "allwinner,sun9i-a80-prcm";
> +			reg = <0x08001400 0x200>;
> +
> +			cpus_clk: cpus_clk {

I wonder whether it would not be more readable to have this as
clk@<prcm_offset>, just like all the other clocks?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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