Subject: [PATCH V2 8/8] cpufreq: OMAP: donot allow to be used with device tree

From: [email-masked] (Santosh Shilimkar)
Date: Wed, 20 Mar 2013 11:47:50 +0530

On Tuesday 19 March 2013 11:23 PM, Nishanth Menon wrote:
> We now use Soc generic cpufreq-cpu0 driver using DT entries.
> However to allow cpufreq-cpu0 and omap-cpufreq drivers to co-exist,
> we need to ensure the following using the same image:
> 1. With device tree boot, we use cpufreq-cpu0
> 2. With non device tree boot, we use omap-cpufreq
> 
> In the case of (1), we will have cpu OPPs and regulator registered
> as part of the DT, to ensure that omap-cpufreq and cpufreq-cpu0 don't
> conflict in managing the frequency of the same cpu, we should not
> permit init to pass in omap-cpufreq.
> 
> In the case of (2), we will not have the cpufreq-cpu0 device, hence
> only omap-cpufreq will be active.
> 
> So, to acommodate both these usage conditions, we fail init of
> omap-cpufreq when we boot with device tree.
> 
> Cc: Kevin Hilman <[email-masked]>
> Cc: Jon Hunter <[email-masked]>
> Cc: "Beno?t Cousson" <[email-masked]>
> Cc: Santosh Shilimkar <[email-masked]>
> Cc: Shawn Guo <[email-masked]>
> Cc: Keerthy <[email-masked]>
> Cc: linux-omap at vger.kernel.org
> Cc: devicetree-discuss at lists.ozlabs.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: cpufreq at vger.kernel.org
> Cc: linux-pm at vger.kernel.org
> 
> Signed-off-by: Nishanth Menon <[email-masked]>
> ---
I haven't followed all the DT binding for opp discussion but
this patch is inline to keep non-DT cpufreq working till we
move to DT only build.
So FWIW,
Acked-by: Santosh Shilimkar <[email-masked]>