linux-kernel - Re: [PATCH V2 0/4] Add i.MX8QXP system controller watchdog support

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Message-ID: <02ea476f-d055-ac12-d1b6-c6caffb14614@roeck-us.net>
Date:   Sun, 17 Feb 2019 21:16:22 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Anson Huang <anson.huang@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>,
        Aisheng Dong <aisheng.dong@....com>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        Daniel Baluta <daniel.baluta@....com>,
        Andy Gross <andy.gross@...aro.org>,
        "horms+renesas@...ge.net.au" <horms+renesas@...ge.net.au>,
        "heiko@...ech.de" <heiko@...ech.de>,
        "arnd@...db.de" <arnd@...db.de>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "jagan@...rulasolutions.com" <jagan@...rulasolutions.com>,
        "enric.balletbo@...labora.com" <enric.balletbo@...labora.com>,
        "marc.w.gonzalez@...e.fr" <marc.w.gonzalez@...e.fr>,
        "olof@...om.net" <olof@...om.net>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>
Cc:     dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH V2 0/4] Add i.MX8QXP system controller watchdog support

On 2/17/19 6:01 PM, Anson Huang wrote:
> i.MX8QXP is an ARMv8 Cortex-A35 SoC with a Cortex-M4 system controller inside,
> the system controller manages overall power, clock, secure RTC and watchdog
> etc., so Linux kernel running on A35 needs to communicate with system
> controller for watchdog operation, this system controller watchdog will
> call SMC to trap to EL3 secure world ARM-Trusted-Firmware and then it will
> request system controller to do the watchdog operation via IPC.
> 
> 
And you expect I'll spend the time comparing this version of the patch
series against version 1 and figure out myself what exactly changed ?

Guenter

Below are the patch dependency:
> 
> The dt-binding and imx8qxp.dtsi patch are based on my thermal patch series as below:
> https://patchwork.kernel.org/patch/10800699/
> 
> Anson Huang (4):
>    dt-bindings: fsl: scu: add watchdog binding
>    watchdog: imx_sc: Add i.MX system controller watchdog support
>    arm64: defconfig: add support for i.MX system controller watchdog
>    arm64: dts: freescale: imx8qxp: add watchdog support
> 
>   .../devicetree/bindings/arm/freescale/fsl,scu.txt  |  10 +
>   arch/arm64/boot/dts/freescale/imx8qxp.dtsi         |   4 +
>   arch/arm64/configs/defconfig                       |   1 +
>   drivers/watchdog/Kconfig                           |  13 ++
>   drivers/watchdog/Makefile                          |   1 +
>   drivers/watchdog/imx_sc_wdt.c                      | 210 +++++++++++++++++++++
>   6 files changed, 239 insertions(+)
>   create mode 100644 drivers/watchdog/imx_sc_wdt.c
>