linux-kernel - Re: [PATCH RESEND] ARM: ep93xx: Disable TS-72xx watchdog before uncompressing

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Message-ID: <d7f36fd2-bc44-9339-d296-b3fc6dfb0531@ti.com>
Date:   Mon, 13 Feb 2017 09:08:12 +0530
From:   Lokesh Vutla <lokeshvutla@...com>
To:     Afzal Mohammed <afzal.mohd.ma@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>
CC:     <arm@...nel.org>, <arnd@...db.de>, <olof@...om.net>,
        <khilman@...nel.org>,
        Hartley Sweeten <hsweeten@...ionengravers.com>,
        Ryan Mallon <rmallon@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "moderated list:ARM/CIRRUS LOGIC EP93XX ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RESEND] ARM: ep93xx: Disable TS-72xx watchdog before
 uncompressing



On Wednesday 08 February 2017 05:53 PM, Afzal Mohammed wrote:
> Hi,
> 
> On Thu, Feb 02, 2017 at 12:12:26PM -0800, Florian Fainelli wrote:
>> The TS-72xx/73xx boards have a CPLD watchdog which is configured to
>> reset the board after 8 seconds, if the kernel is large enough that this
>> takes about this time to decompress the kernel, we will encounter a
>> spurious reboot.
> 
> so once it reaches Kernel proper, that dog is being killed, right ?
> 
> iirc, TI AM335x's & AM43x's ROM code too leaves the on-chip watchdog
> enabled & the bootloader disables it (else once it boots to prompt, it
> reboots always unless watchdog driver [if present] takes care of it),
> Lokesh, right ?

Yes, that's right. Watchdog is disabled in U-Boot.

Thanks and regards,
Lokesh