linux-kernel - Aw: Re: [PATCH v2 5/7] power: reset: add driver for mt6323 poweroff

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Message-ID: <trinity-03acdbbe-a94a-439c-a65c-88c9e23a0ae7-1562238391586@3c-app-gmx-bs27>
Date:   Thu, 4 Jul 2019 13:06:31 +0200
From:   "Frank Wunderlich" <frank-w@...lic-files.de>
To:     "Ran Bi" <ran.bi@...iatek.com>
Cc:     "Lee Jones" <lee.jones@...aro.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        "Sean Wang" <sean.wang@...iatek.com>,
        "Sebastian Reichel" <sre@...nel.org>,
        "Alessandro Zummo" <a.zummo@...ertech.it>,
        "Alexandre Belloni" <alexandre.belloni@...tlin.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-rtc@...r.kernel.org,
        "Eddie Huang" <eddie.huang@...iatek.com>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "Richard Fontana" <rfontana@...hat.com>,
        "Allison Randal" <allison@...utok.net>,
        "David S . Miller" <davem@...emloft.net>,
        "Mauro Carvalho Chehab" <mchehab+samsung@...nel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Rob Herring" <robh@...nel.org>,
        "Linus Walleij" <linus.walleij@...aro.org>,
        "Nicolas Ferre" <nicolas.ferre@...rochip.com>,
        "Paul E . McKenney" <paulmck@...ux.ibm.com>,
        "Josef Friedl" <josef.friedl@...ed.at>,
        "Yingjoe Chen" <yingjoe.chen@...iatek.com>,
        "Ran Bi" <ran.bi@...iatek.com>
Subject: Aw: Re: [PATCH v2 5/7] power: reset: add driver for mt6323 poweroff

> Gesendet: Donnerstag, 04. Juli 2019 um 12:03 Uhr
> Von: "Ran Bi" <ran.bi@...iatek.com>

> We had implement MT8173 poweroff function in arm-trusted-firmware's PSCI
> plat_system_off() function. MT8173 SoC is using PMIC MT6397. (Ref:
> https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8173/plat_pm.c and https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/mediatek/mt8173/drivers/rtc) Do you think it's better to implement poweroff function into arm-trusted-firmware compared to hijack pm_poweroff() function in Kernel? Right now, we are doing the upstream of other PMIC chip like MT6358's poweroff function in arm-trusted-firmware too.

ATF imho only used for arm64, my board is 32bit armv7 and i (currently) do not boot up with ATF

regards Frank