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From: Guenter Roeck <linux@roeck-us.net>
To: Jisheng Zhang <jszhang@marvell.com>,
	Doug Anderson <dianders@chromium.org>
Cc: Wim Van Sebroeck <wim@iguana.be>,
	Heiko Stuebner <heiko@sntech.de>,
	Lunxue Dai <lunxue.dai@rock-chips.com>,
	Dinh Nguyen <dinguyen@altera.com>,
	"linux-watchdog@vger.kernel.org" <linux-watchdog@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] watchdog: dw_wdt: pat the watchdog before enabling it
Date: Mon, 26 Jan 2015 20:07:51 -0800	[thread overview]
Message-ID: <54C70F17.7070003@roeck-us.net> (raw)
In-Reply-To: <20150127114403.71736c3f@xhacker>

On 01/26/2015 07:44 PM, Jisheng Zhang wrote:
> Dear Doug,
>
> On Mon, 26 Jan 2015 09:01:37 -0800
> Doug Anderson <dianders@chromium.org> wrote:
>
>> Jisheng,
>>
>> On Sun, Jan 25, 2015 at 10:22 PM, Jisheng Zhang <jszhang@marvell.com> wrote:
>>>> Specifically I see the register WDT_TORR that has an offset of 0x4.
>>>> That's the RANGE_REG in your code.  It shows bits 3:0 set the timeout
>>>> period (0 = 0xffff and 15 = 0x7fffffff).  It shows bits 31:4 as
>>>> "reserved".
>>>
>>> Could you please dump registers' value at offset 0xf4 and 0xf8 if you
>>> don't mind?
>>
>> Those are not documented in the user manual that I have, but:
>>
>>>>> r(0xff8000f4)
>> 0x10000a02
>>>>> r(0xff8000f8)
>> 0x3130332a
>
Hi Jisheng,

This translates to ascii "103*". How does it translate to "1.02a" ?

> Thanks. Now I got some information about your platform:
>
> wdt version: v1.02a
>
> WDT_DUAL_TOP is configured as false, so there's no TOP_INIT
> WDT_DFLT_TOP is configured as 0, so it will timeout soon.
>
Any chance you can provide the bit map for the register reporting
those flags ?

Thanks,
Guenter


  reply	other threads:[~2015-01-27  4:07 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-21 23:17 Doug Anderson
2015-01-21 23:17 ` [PATCH 2/2] watchdog: dw_wdt: Try to get a 30 second watchdog by default Doug Anderson
2015-01-21 23:36   ` Guenter Roeck
2015-01-21 23:35 ` [PATCH 1/2] watchdog: dw_wdt: pat the watchdog before enabling it Guenter Roeck
2015-01-22  5:22 ` Jisheng Zhang
2015-01-22  5:31   ` Guenter Roeck
2015-01-22 17:09   ` Doug Anderson
2015-01-23 16:03     ` Guenter Roeck
2015-01-23 16:20       ` Doug Anderson
2015-01-23 17:02         ` Guenter Roeck
2015-01-26  6:22     ` Jisheng Zhang
2015-01-26 17:01       ` Doug Anderson
2015-01-27  3:44         ` Jisheng Zhang
2015-01-27  4:07           ` Guenter Roeck [this message]
2015-01-27  4:36             ` Jisheng Zhang

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