linux-kernel - Re: [PATCH v2 2/2] watchdog: Add new arm_smd

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Message-ID: <20200403060048.GA206691@roeck-us.net>
Date:   Thu, 2 Apr 2020 23:00:48 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Evan Benn <evanbenn@...omium.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, xingyu.chen@...ogic.com,
        jwerner@...omium.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Anson Huang <Anson.Huang@....com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Leonard Crestez <leonard.crestez@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Marcin Juszkiewicz <marcin.juszkiewicz@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Olof Johansson <olof@...om.net>, Rob Herring <robh@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Valentin Schneider <valentin.schneider@....com>,
        Vinod Koul <vkoul@...nel.org>, Will Deacon <will@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v2 2/2] watchdog: Add new arm_smd_wdt watchdog driver

On Fri, Apr 03, 2020 at 04:29:00PM +1100, Evan Benn wrote:
> From: Julius Werner <jwerner@...omium.org>
> 
> This patch adds a watchdog driver that can be used on ARM systems
> with the appropriate watchdog implemented in Secure Monitor firmware.
> The driver communicates with firmware via a Secure Monitor Call.
> This may be useful for platforms using TrustZone that want
> the Secure Monitor firmware to have the final control over the watchdog.
> 
> This is implemented on mt8173 chromebook devices oak, elm and hana in
> arm trusted firmware file plat/mediatek/mt8173/drivers/wdt/wdt.c.
> 
> Signed-off-by: Julius Werner <jwerner@...omium.org>
> Signed-off-by: Evan Benn <evanbenn@...omium.org>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

Guenter