linux-kernel - Re: [PATCH v2 2/2] watchdog: Add Apple SoC watchdog driver

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Date:   Tue, 30 Nov 2021 21:55:28 +0100
From:   Janne Grunau <j@...nau.net>
To:     Sven Peter <sven@...npeter.dev>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Hector Martin <marcan@...can.st>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/2] watchdog: Add Apple SoC watchdog driver

Hej,

On 2021-11-30 17:18:09 +0100, Sven Peter wrote:
> Add support for the watchdog timer found in Apple SoCs. This driver is
> also required to reboot these machines.
> 
> Signed-off-by: Sven Peter <sven@...npeter.dev>
> ---
> v1 -> v2:
>  - set the default timeout to 30s and call watchdog_init_timeout
>    to allow the device tree to override it
>  - set WDOG_HW_RUNNING if the watchdog is enabled at boot
>  - check that the clock rate is not zero
>  - use unsigned long instead of u32 for clk_rate
>  - use devm_add_action_or_reset instead of manually calling
>    clk_disable_unprepare
>  - explain the magic number in apple_wdt_restart
> 
>  MAINTAINERS                  |   1 +
>  drivers/watchdog/Kconfig     |  12 ++
>  drivers/watchdog/Makefile    |   1 +
>  drivers/watchdog/apple_wdt.c | 226 +++++++++++++++++++++++++++++++++++
>  4 files changed, 240 insertions(+)
>  create mode 100644 drivers/watchdog/apple_wdt.c

Tested on M1 and M1 Max. Feel free to add
Tested-by: Janne Grunau <j@...nau.net>

best
Janne