linux-kernel - Re: [rtc-linux] [PATCH] rtc: s3c: Document required clocks in the DT binding

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Message-ID: <56C01FDD.9050204@samsung.com>
Date:	Sun, 14 Feb 2016 15:34:05 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org,
	Javier Martinez Canillas <javier@....samsung.com>
Cc:	k.kozlowski.k@...il.com, devicetree@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	Alessandro Zummo <a.zummo@...ertech.it>
Subject: Re: [rtc-linux] [PATCH] rtc: s3c: Document required clocks in the DT
 binding

W dniu 10.02.2016 o 02:23, Javier Martinez Canillas pisze:
> The S3C Real Time Clock driver requires the clock and source clock to
> be defined in the device node but that requirement is not documented.

+Cc: Alessandro Zummo

No, not entirely. The samsung,s3c6410-rtc needs rtc and rtc_src clocks
but rest of compatible devices need only rtc clock.

Best regards,
Krzysztof

> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> ---
> 
>  Documentation/devicetree/bindings/rtc/s3c-rtc.txt | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/rtc/s3c-rtc.txt b/Documentation/devicetree/bindings/rtc/s3c-rtc.txt
> index ac2fcd6ff4b8..1068ffce9f91 100644
> --- a/Documentation/devicetree/bindings/rtc/s3c-rtc.txt
> +++ b/Documentation/devicetree/bindings/rtc/s3c-rtc.txt
> @@ -14,6 +14,10 @@ Required properties:
>    interrupt number is the rtc alarm interrupt and second interrupt number
>    is the rtc tick interrupt. The number of cells representing a interrupt
>    depends on the parent interrupt controller.
> +- clocks: Must contain a list of phandle and clock specifier for the rtc
> +          and source clocks.
> +- clock-names: Must contain "rtc" and "rtc_src" entries sorted in the
> +               same order as the clocks property.
>  
>  Example:
>  
> @@ -21,4 +25,6 @@ Example:
>  		compatible = "samsung,s3c6410-rtc";
>  		reg = <0x10070000 0x100>;
>  		interrupts = <44 0 45 0>;
> +		clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;
> +		clock-names = "rtc", "rtc_src";
>  	};
>