linux-kernel - Re: [RFC PATCH 3/3] devicetree: macb: Add optional property tsu-clk

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Message-ID: <20150911165256.GT19678@xsjsorenbubuntu>
Date:	Fri, 11 Sep 2015 09:52:56 -0700
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	Harini Katakam <harini.katakam@...inx.com>
CC:	<nicolas.ferre@...el.com>, <davem@...emloft.net>,
	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<boris.brezillon@...e-electrons.com>,
	<alexandre.belloni@...e-electrons.com>,
	<harinikatakamlinux@...il.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<harinik@...inx.com>, <punnaia@...inx.com>, <michals@...inx.com>,
	<anirudh@...inx.com>
Subject: Re: [RFC PATCH 3/3] devicetree: macb: Add optional property tsu-clk

Hi Harini,

On Fri, 2015-09-11 at 01:27PM +0530, Harini Katakam wrote:
> Add TSU clock frequency to be used for 1588 support in macb driver.
> 
> Signed-off-by: Harini Katakam <harinik@...inx.com>
> ---
>  Documentation/devicetree/bindings/net/macb.txt |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
> index b5d7976..f7c0ea8 100644
> --- a/Documentation/devicetree/bindings/net/macb.txt
> +++ b/Documentation/devicetree/bindings/net/macb.txt
> @@ -19,6 +19,9 @@ Required properties:
>  	Optional elements: 'tx_clk'
>  - clocks: Phandles to input clocks.
>  
> +Optional properties:
> +- tsu-clk: Time stamp unit clock frequency used.

Why are we not using the CCF and a clk_get_rate() in the driver?

	Sören
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