linux-kernel - Re: [PATCH v3] pwm: lpss: Add support for runtime PM

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Date:	Fri, 6 Nov 2015 14:36:46 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Huiquan Zhong <huiquan.zhong@...el.com>,
	Qipeng Zha <qipeng.zha@...el.com>, linux-pwm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] pwm: lpss: Add support for runtime PM

On Mon, Oct 26, 2015 at 12:58:27PM +0200, Mika Westerberg wrote:
> From: Qipeng Zha <qipeng.zha@...el.com>
> 
> To be able to save some power when PWM is not in use, add support for
> runtime PM for this driver. This also allows the platform to transition to
> low power S0ix states when the system is idle.
> 
> Signed-off-by: Huiquan Zhong <huiquan.zhong@...el.com>
> Signed-off-by: Qipeng Zha <qipeng.zha@...el.com>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
> The original patch from Qipeng is here:
> 
> http://thread.gmane.org/gmane.linux.pwm/2803
> 
> I modified it a bit so that it does runtime_pm_get_sync() on enable and
> runtime_pm_put() on disable. That allows us to get rid of the autosuspend
> thing in v2.
> 
> This applies on top of my previous series here:
> 
> http://thread.gmane.org/gmane.linux.pwm/2920
> 
>  drivers/pwm/pwm-lpss-pci.c      | 32 ++++++++++++++++++++++++++++++++
>  drivers/pwm/pwm-lpss-platform.c |  6 ++++++
>  drivers/pwm/pwm-lpss.c          |  7 +++++++
>  3 files changed, 45 insertions(+)

Applied, thanks.

Thierry

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