linux-kernel - Re: [PATCH v2 2/4] ARM: rockchip: add suspend and resume for RK3288

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Date:	Fri, 17 Oct 2014 17:57:20 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Chris <zyw@...k-chips.com>
Cc:	Heiko Stuebner <heiko@...ech.de>,
	Mike Turquette <mturquette@...aro.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	linux-rockchip@...ts.infradead.org,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Tony Xie <xxx@...k-chips.com>
Subject: Re: [PATCH v2 2/4] ARM: rockchip: add suspend and resume for RK3288

Chris,

On Fri, Oct 17, 2014 at 1:47 PM,  <zyw@...k-chips.com> wrote:
> From: Chris Zhong <zyw@...k-chips.com>
>
> It's a basic version of suspend and resume for rockchip, it only support RK3288
> now.
>
> Signed-off-by: Tony Xie <xxx@...k-chips.com>
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
>
> ---
>
> Changes in v2:
> - add the regulator calls in prepare and finish.
> - add the pinmux of gpio6_c6 save and restore

I'm a bit out of time to do a real review right now, but I would have
expected that the pinmux stuff:

* was saved and restored in the pinmux driver.

* was in a separate patch, before this one in the series.


The pinmux driver should have callbacks for saving and restoring
pinmux state, so you should use those.  Maybe exynos_pinctrl_suspend()
is an example, though you only need to save one pin.  You should
probably also explain that only gpio6_c6 needs to be saved and
restored since the MaskROM clobbers it upon resume.

-Doug
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