linux-kernel - Re: [PATCH RFC 3/4] clk: samsung: Add driver to control CLKOUT line on Exynos SoCs

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Date:	Mon, 19 May 2014 12:46:09 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	Tomasz Figa <t.figa@...sung.com>, linux-samsung-soc@...r.kernel.org
CC:	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Mike Turquette <mturquette@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Pankaj Dubey <pankaj.dubey@...sung.com>,
	Rahul Sharma <rahul.sharma@...sung.com>,
	Mark Brown <broonie@...nel.org>,
	Tomasz Figa <tomasz.figa@...il.com>
Subject: Re: [PATCH RFC 3/4] clk: samsung: Add driver to control CLKOUT line
 on Exynos SoCs

On 05/15/2014 11:02 PM, Tomasz Figa wrote:
> This patch introduces a driver that handles configuration of CLKOUT pin
> of Exynos SoCs that can be used to output certain clocks from inside of
> the SoC to a dedicated output pin.
> 
> Signed-off-by: Tomasz Figa <t.figa@...sung.com>
> ---

Tested the series on Exynos5420-based peach-pit board for audio playback
(with an internal patch to set CLK_FIN_PLL as the parent of clkout).

Tested-by: Tushar Behera <tushar.behera@...aro.org>

>  Example :
>  pmu_system_controller: system-controller@...40000 {
>  	compatible = "samsung,exynos5250-pmu", "syscon";
>  	reg = <0x10040000 0x5000>;
> +	#clock-cells = <0>;
> +	clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
> +			"clkout4", "clkout8", "clkout9";
> +	clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
> +		<&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
> +		<&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
> +		<&clock CLK_XUSBXTI>;
>  };

Adding an usage example in the documentation would be helpful.


-- 
Tushar Behera
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