linux-kernel - Re: [PATCH 4/5] ARM: berlin/dt: add cpupll and syspll support to BG2CD

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Date:	Fri, 21 Mar 2014 13:13:20 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Mike Turquette <mturquette@...aro.org>
CC:	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>
Subject: Re: [PATCH 4/5] ARM: berlin/dt: add cpupll and syspll support to
 BG2CD

On 03/21/2014 12:43 PM, Alexandre Belloni wrote:
> This also moves the clocks from the clocks container node to the root.

Please leave a word on the original intention of the patch here, too.

> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> ---
>   arch/arm/boot/dts/berlin2cd.dtsi | 56 ++++++++++++++++++++++++++++------------
>   1 file changed, 39 insertions(+), 17 deletions(-)
>
> diff --git a/arch/arm/boot/dts/berlin2cd.dtsi b/arch/arm/boot/dts/berlin2cd.dtsi
> index 094968c27533..c84013c1597c 100644
> --- a/arch/arm/boot/dts/berlin2cd.dtsi
> +++ b/arch/arm/boot/dts/berlin2cd.dtsi
> @@ -30,24 +30,46 @@
>   		};
>   	};
>
> -	clocks {
> -		smclk: sysmgr-clock {
> -			compatible = "fixed-clock";
> -			#clock-cells = <0>;
> -			clock-frequency = <25000000>;
> -		};
> +	smclk: sysmgr-clock {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <25000000>;
> +	};
>
> -		cfgclk: cfg-clock {
> -			compatible = "fixed-clock";
> -			#clock-cells = <0>;
> -			clock-frequency = <75000000>;
> -		};
> +	cfgclk: cfg-clock {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <75000000>;
> +	};
>
> -		sysclk: system-clock {
> -			compatible = "fixed-clock";
> -			#clock-cells = <0>;
> -			clock-frequency = <300000000>;
> -		};
> +	syspll: syspll {

syspll: pll@...014 and sort it in SoC nodes.

> +		compatible = "marvell,berlin2-pll";
> +		clocks = <&smclk>;
> +		#clock-cells = <0>;
> +		reg = <0xf7ea0014 8>;
> +	};
> +
> +	cpupll: cpupll {

ditto.

> +		compatible = "marvell,berlin2-pll";
> +		clocks = <&smclk>;
> +		#clock-cells = <0>;
> +		reg = <0xf7ea003c 8>;
> +	};
> +
> +	cpuclk: cpu-clock {
> +		compatible = "fixed-factor-clock";
> +		clocks = <&cpupll>;
> +		#clock-cells = <0>;
> +		clock-div = <1>;
> +		clock-mult = <1>;

Same comment about cpuclk to cpupll relation.

> +	};
> +
> +	twdclk: twdclk {
> +		compatible = "fixed-factor-clock";
> +		#clock-cells = <0>;
> +		clocks = <&cpuclk>;
> +		clock-mult = <1>;
> +		clock-div = <3>;
>   	};
>
>   	soc {
> @@ -76,7 +98,7 @@
>   			compatible = "arm,cortex-a9-twd-timer";
>   			reg = <0xad0600 0x20>;
>   			interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_HIGH>;
> -			clocks = <&sysclk>;
> +			clocks = <&twdclk>;
>   		};
>
>   		apb@...000 {
>

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