linux-kernel - Re: [PATCH v2 6/6] watchdog: ts4600: add driver for TS-4600 watchdog

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Message-ID: <20170208215014.d2tblyu7olhph5qx@rob-hp-laptop>
Date:   Wed, 8 Feb 2017 15:50:14 -0600
From:   Rob Herring <robh@...nel.org>
To:     Sebastien Bourdelin <sebastien.bourdelin@...oirfairelinux.com>
Cc:     linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        kernel@...oirfairelinux.com, linux@...ck-us.net,
        linus.walleij@...aro.org, fabio.estevam@....com,
        mark@...eddedarm.com, kris@...eddedarm.com,
        horms+renesas@...ge.net.au, treding@...dia.com,
        jonathanh@...dia.com, f.fainelli@...il.com, kernel@...gutronix.de,
        shawnguo@...nel.org, linux@...linux.org.uk, wim@...ana.be,
        mark.rutland@....com, damien.riegel@...oirfairelinux.com,
        lucile.quirion@...oirfairelinux.com, olof@...om.net, arnd@...db.de,
        suzuki.poulose@....com, will.deacon@....com,
        yamada.masahiro@...ionext.com
Subject: Re: [PATCH v2 6/6] watchdog: ts4600: add driver for TS-4600 watchdog

On Fri, Feb 03, 2017 at 02:47:29PM -0500, Sebastien Bourdelin wrote:
> This watchdog is instantiated in a FPGA and can only be access using a
> GPIOs bit-banged bus, called the NBUS by Technologic Systems.
> The watchdog is made of only one register, called the feed register.
> Writing to this register will re-arm the watchdog for a given time (and
> enable it if it was disable). It can be disabled by writing a special
> value into it.
> 
> ---
> Changes v1 -> v2:
>   - rebase on master
>   - retrieve the ts_nbus instantiated by the parent node (suggested by
>   Linus Walleij)
>   - rename the wdt by watchdog in the device tree and in the
>   documentation (suggested by Rob Herring)
>   - add a dependency to the TS_NBUS driver in the Kconfig (suggested by
>   Guenter Roeck)
>   - simplify the set_timeout function (suggested by Guenter Roeck)
>   - use the max_hw_heartbeat_ms callback instead of the max_timeout
>   callback (suggested by Guenter Roeck)
> 
> Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@...oirfairelinux.com>
> ---
>  .../devicetree/bindings/watchdog/ts4600-wdt.txt    |  16 ++
>  arch/arm/boot/dts/imx28-ts4600-common.dtsi         |   5 +

Acked-by: Rob Herring <robh@...nel.org>

>  drivers/watchdog/Kconfig                           |  11 ++
>  drivers/watchdog/Makefile                          |   1 +
>  drivers/watchdog/ts4600_wdt.c                      | 217 +++++++++++++++++++++
>  5 files changed, 250 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/ts4600-wdt.txt
>  create mode 100644 drivers/watchdog/ts4600_wdt.c