linux-kernel - Re: [RFCv1 0/8] RK3399 clean shutdown issue

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Message-ID: <CANAwSgT_k5VgtQcP_vOX4Goa-9_B6GmXP+i-hAwpZuTRVTPt_Q@mail.gmail.com>
Date:   Sat, 7 Dec 2019 10:37:49 +0530
From:   Anand Moon <linux.amoon@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Robin Murphy <robin.murphy@....com>,
        Daniel Schultz <d.schultz@...tec.de>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-rockchip@...ts.infradead.org,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFCv1 0/8] RK3399 clean shutdown issue

Hi Heiko,

On Sat, 7 Dec 2019 at 04:02, Heiko Stuebner <heiko@...ech.de> wrote:
>
> Hi Anand,
>
> Am Freitag, 6. Dezember 2019, 19:45:28 CET schrieb Anand Moon:
> > Most of the RK3399 SBC boards do not perform clean
> > shutdown and clean reboot.
> >
> > These patches try to help resolve the issue with proper
> > shutdown by turning off the PMIC.
> >
> > For reference
> > RK805 PMCI data sheet:
> > [0] http://rockchip.fr/RK805%20datasheet%20V1.3.pdf
> > RK808 PMIC data sheet:
> > [1] http://rockchip.fr/RK808%20datasheet%20V1.4.pdf
> > RK817 PMIC data sheet:
> > [2] http://rockchip.fr/RK817%20datasheet%20V1.01.pdf
> > RK818 PMIC data sheet:
> > [3] http://rockchip.fr/RK818%20datasheet%20V1.0.pdf
> >
> > Reboot issue:
> > My guess is that we need to some proper sequence of
> > setting to PMCI to perform clean.
> >
> > If you have any input please share them.
>
> The rk8xx pmics may not on all devices be responsible for powering down
> the device. That is what the system-power-controller dt-property is for.
>
> So that property is there for a reason - to indicate that the pmic is
> responsible for power-off-handling.
>
> Heiko
>

Ok, my intent was to have common framework for
shutdown, restart, suspend, resume routines.

-Anand