linux-kernel - Re: [PATCH 08/14] ARM: OMAP2: Add functions to save and restore pinctrl context.

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Date:   Fri, 13 Apr 2018 11:46:04 +0530
From:   Keerthy <j-keerthy@...com>
To:     Tony Lindgren <tony@...mide.com>
CC:     <linus.walleij@...aro.org>, <grygorii.strashko@...com>,
        <t-kristo@...com>, <Russ.Dill@...com>,
        <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <ssantosh@...nel.org>, <haojian.zhuang@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>, <d-gerlach@...com>,
        Russ Dill <Russ.Dill@...il.com>
Subject: Re: [PATCH 08/14] ARM: OMAP2: Add functions to save and restore
 pinctrl context.



On Thursday 12 April 2018 07:46 PM, Tony Lindgren wrote:
> Hi,
> 
> * Keerthy <j-keerthy@...com> [180412 03:56]:
>> From: Russ Dill <Russ.Dill@...il.com>
>>
>> This adds a pair of context save/restore functions to save/restore the
>> state of a set of pinctrl registers. This simplifies some of the AM33XX
>> PM code as some of the pinctrl registers are lost when the per power
>> domain loses power. The pincrtl code can perform the necessary
>> save/restore.
> 
> So where's the patch adding callers to this code?

This series was to get all the additional save/restores needed for the
rtc+ddr mode. Caller patch is in the main patch that implements that
mode that i will be posting once the ground is set.

Based on enable_off_mode being set this function was called only for
rtc+ddr mode.

> 
> If this cannot be done from regular driver suspend/resume calls,
> this probably should be done from cpu_pm notifiers CPU_PM_ENTER and
> CPU_PM_EXIT. We should also do the same for GPIO BTW.

I will look into that. Thanks for suggestion.

> 
> BTW, the subject line is wrong here, it should be "pinctrl" :)

Oops yes that should be pinctrl.

> 
> Regards,
> 
> Tony
>