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From:   Tomasz Figa <tfiga@chromium.org>
Date:   Wed, 28 Feb 2018 23:07:44 +0900
Message-ID: <CAAFQd5C0GZ9C-pAqAdpuyxaF2xthLPY62a921nmABTbbmYtBmQ@mail.gmail.com>
Subject: Re: [PATCH] soc: rockchip: power-domain: remove PM clocks
To:     Geert Uytterhoeven <geert@linux-m68k.org>
Cc:     Jeffy Chen <jeffy.chen@rock-chips.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Heiko Stuebner <heiko@sntech.de>,
        Caesar Wang <wxt@rock-chips.com>,
        Elaine Zhang <zhangqing@rock-chips.com>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@lists.infradead.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Ulf Hansson <ulf.hansson@linaro.org>
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On Wed, Feb 28, 2018 at 10:11 PM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> Hi Tomasz,
>
> On Wed, Feb 28, 2018 at 1:49 PM, Tomasz Figa <tfiga@chromium.org> wrote:
>> On Wed, Feb 28, 2018 at 9:32 PM, Geert Uytterhoeven
>> <geert@linux-m68k.org> wrote:
>>> On Wed, Feb 28, 2018 at 1:29 PM, Tomasz Figa <tfiga@chromium.org> wrote:
>>>> Also, how about systems where runtime PM is disabled? I think that's
>>>> one of the reasons we control the clocks explicitly in the drivers
>>>> anyway.
>>>
>>> On many platforms, Runtime PM is always enabled.
>>
>> Can we make such assumption? If so, could we just make an explicit
>> "select PM_RUNTIME" in Kconfig of the SoC?
>
> Note that the PM_RUNTIME symbol was removed in commit 464ed18ebdb6236f
> ("PM: Eliminate CONFIG_PM_RUNTIME"), in favor of plain PM.
>
> The following already select PM unconditionally:
>   - ARCH_OMAP2PLUS_TYPICAL
>   - ARCH_RENESAS (except EMEV2)
>   - ARCH_TEGRA
>   - ARCH_VEXPRESS

Thanks! Sounds like we might be able to simplify a lot of things with
doing the same for Rockchip.

Best regards,
Tomasz