linux-kernel - Re: [PATCHv1 0/2] Add FSYS2 power domain for MMC driver

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Message-ID: <CANAwSgR+PFiE0=FEhDY__FDx+470pe0OsbUXcSG64JDuG++ccQ@mail.gmail.com>
Date:   Thu, 13 Feb 2020 18:58:51 +0530
From:   Anand Moon <linux.amoon@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-samsung-soc@...r.kernel.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        "open list:COMMON CLK FRAMEWORK" <linux-clk@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCHv1 0/2] Add FSYS2 power domain for MMC driver

hi Krzysztof,

On Thu, 13 Feb 2020 at 15:47, Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Wed, Feb 12, 2020 at 12:02:35PM +0000, Anand Moon wrote:
> > This patches add the power domain for MMC driver,
> > but somehow the suspend/resume feature is broken
> > so any input on how to fix this.
>
> I think S2R was working on XU3-family after Marek's fixes, so you mean
> that these patches break it?
>
Yes I my testing mmc driver failed to come up after suspend.

But I see below in power domain, Just to confirm.
#  cat /sys/kernel/debug/pm_genpd/pm_genpd_summary
domain                          status          slaves
    /device                                             runtime status
----------------------------------------------------------------------
CAM                             off-0
FSYS2                           on
    /devices/platform/soc/10010000.clock-controller/exynos5-subcmu.6.auto
 active
    /devices/platform/soc/12200000.mmc                  active
    /devices/platform/soc/12220000.mmc                  active

# powerdebug -d
FSYS2:
current_state: on
active_time: 29016991 ms
total_idle_time: 4037 ms
Idle States:
             State            Time
             S0               4037
Devices:
         /devices/platform/soc/10010000.clock-controller/exynos5-subcmu.6.auto
         /devices/platform/soc/12200000.mmc
         /devices/platform/soc/12220000.mmc

> Best regards,
> Krzysztof
>
>

-Anand

> >
> > Also on similar lines I tried to add power domain
> > FSYS for usb3 and usb2 nodes but this time
> > it failed to load the kernel, so how can I reslove
> > this issue.
> >
> > -Anand
> >
> > Anand Moon (2):
> >   ARM: dts: exynos: Add FSYS2 power domain to Exynos542x
> >   clk: samsung: exynos542x: Move FSYS2 subsystem clocks to its sub-CMU
> >
> >  arch/arm/boot/dts/exynos5420.dtsi    | 10 ++++++++++
> >  drivers/clk/samsung/clk-exynos5420.c | 24 +++++++++++++++++++++---
> >  2 files changed, 31 insertions(+), 3 deletions(-)
> >
> > --
> > 2.25.0
> >