linux-kernel - Re: [PATCH 1/2] mmc: sdhci-of-arasan: add phy support for sdhci-of-arasan

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Date:	Mon, 19 Oct 2015 22:56:53 +0800
From:	Shawn Lin <shawn.lin@...k-chips.com>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	shawn.lin@...k-chips.com, Michal Simek <michal.simek@...inx.com>,
	S?ren Brinkmann <soren.brinkmann@...inx.com>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] mmc: sdhci-of-arasan: add phy support for
 sdhci-of-arasan

On 2015/10/19 18:54, Ulf Hansson wrote:
> [...]
>

[...]

>
>>
>>> 2) Considering the runtime PM case for the sdhci device. Typically you
>>> can gate clocks etc at runtime suspend to save power, but what about
>>> the phy? Can you power off it in runtime suspend?
>>
>>
>> yes, we can power off it in runtime suspend. So we can append some patches
>> later to introduce runtime pm for sdhci-of-arasan?
>
> Yes, that's fine. I would thus expect that you want to do phy power
> off/on from the runtime PM callbacks, right!?
>
> If that's the case I think $subject patch should deal with *both* phy
> init and phy power on during ->probe().
>

yes. I will do phy power_off/on from runtime pm for the next version of 
$subject patchset.

Thanks.

> Kind regards
> Uffe
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>


-- 
Best Regards
Shawn Lin

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