linux-kernel - Re: [PATCH V3 2/8] ARM: cpuidle: Add a cpuidle ops structure to be used for DT

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Date:	Wed, 25 Mar 2015 14:34:30 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	rjw@...ysocki.net, lorenzo.pieralisi@....com,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Catalin.Marinas@....com, robherring2@...il.com, arnd@...db.de,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	lina.iyer@...aro.org
Subject: Re: [PATCH V3 2/8] ARM: cpuidle: Add a cpuidle ops structure to be
 used for DT

On 03/20, Daniel Lezcano wrote:
> The current state of the different cpuidle drivers is the different PM
> operations are passed via the platform_data using the platform driver
> paradigm.
> 
> This approach allowed to split the low level PM code from the arch specific
> and the generic cpuidle code.
> 
> Unfortunately there are complaints about this approach as, in the context of the
> single kernel image, we have multiple drivers loaded in memory for nothing and
> the platform driver is not adequate for cpuidle.
> 
> This patch provides a common interface via cpuidle ops for all new cpuidle
> driver and a definition for the device tree.
> 
> It will allow with the next patches to a have a common definition with ARM64
> and share the same cpuidle driver.
> 
> The code is optimized to use the __init section intensively in order to reduce
> the memory footprint after the driver is initialized and unify the function
> names with ARM64.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> Acked-by: Kevin Hilman <khilman@...aro.org>
> Acked-by: Rob Herring <robherring2@...il.com>

Thanks for moving to OF tables. We can merge smp ops and cpuidle
ops later on.

Acked-by: Stephen Boyd <sboyd@...eaurora.org>

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