linux-kernel - Re: [PATCH, RFC 3/8] ARM: twd: clock rate from DT (if no DT clk tree)

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Message-ID: <51235173.5020000@ti.com>
Date:	Tue, 19 Feb 2013 15:48:27 +0530
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	Afzal Mohammed <afzal@...com>
CC:	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Tony Lindgren <tony@...mide.com>,
	Marc Zyngier <marc.zyngier@....com>,
	Nicolas Pitre <nico@...aro.org>,
	Will Deacon <will.deacon@....com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Landley <rob@...dley.net>, Sekhar Nori <nsekhar@...com>,
	Syed Mohammed Khasim <khasim@...com>
Subject: Re: [PATCH, RFC 3/8] ARM: twd: clock rate from DT (if no DT clk tree)

On Monday 18 February 2013 05:07 PM, Afzal Mohammed wrote:
> Add an optional property to find clock-frequency from DT. This helps
> as a fallback mechanism in case there is no representation of clock
> tree in DT.
>
> Signed-off-by: Afzal Mohammed <afzal@...com>
> ---
This won't work always because twd clock is CPU dependent and changes
with CPU clock speed. And more importantly to get CPUFreq working, you
need to provide the correct clock-node to TWD library. Refer OMAP4 clock
data for reference.

Regards,
Santosh


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