linux-kernel - Re: [PATCH 1/7] mmc: dw_mmc: lookup for optional biu and ciu clocks

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Date:	Wed, 2 May 2012 10:53:11 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Thomas Abraham <thomas.abraham@...aro.org>
Cc:	linux-mmc@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-samsung-soc@...r.kernel.org, patches@...aro.org,
	linux-kernel@...r.kernel.org, rob.herring@...xeda.com,
	grant.likely@...retlab.ca, kgene.kim@...sung.com, cjb@...top.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/7] mmc: dw_mmc: lookup for optional biu and ciu clocks

On Tue, May 01, 2012 at 10:07:40PM -0700, Thomas Abraham wrote:
> Some platforms allow for clock gating and control of bus interface unit clock
> and card interface unit clock. Add support for clock lookup of optional biu
> and ciu clocks for clock gating and clock speed determination.

As we're moving progressively towards the common clk API, which requires
the new clk_prepare/clk_unprepare calls, new code should be using the
dated API.  Please update this to do so (eg, by using clk_prepare_enable()
instead of clk_enable() for the simple solution.)  Better solutions
involve decoupling the two and only using clk_enable()/clk_disable() where
you really need the clock to be on.
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