From: Akshay Bhat <akshay.bhat@timesys.com>
To: Guenter Roeck <linux@roeck-us.net>,
Tim Harvey <tharvey@gateworks.com>,
linux-watchdog@vger.kernel.org, Shawn Guo <shawnguo@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
Fabio Estevam <festevam@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
Wim Van Sebroeck <wim@iguana.be>, Stefan Roese <sr@denx.de>,
Iain Paton <ipaton0@gmail.com>,
Sascha Hauer <s.hauer@pengutronix.de>
Subject: Re: [PATCH v5 1/2] watchdog: imx2_wdt: add external reset support via dt prop
Date: Mon, 18 Apr 2016 12:05:10 -0400 [thread overview]
Message-ID: <571505B6.7030808@timesys.com> (raw)
In-Reply-To: <570704E1.6010700@roeck-us.net>
On 04/07/2016 09:09 PM, Guenter Roeck wrote:
> On 04/01/2016 08:16 AM, Tim Harvey wrote:
>> The IMX6 watchdog supports assertion of a signal (WDOG_B) which
>> can be pinmux'd to an external pin. This is typically used for boards
>> that
>> have PMIC's in control of the IMX6 power rails. In fact, failure to use
>> such an external reset on boards with external PMIC's can result in
>> various
>> hangs due to the IMX6 not being fully reset [1] as well as the board
>> failing
>> to reset because its PMIC has not been reset to provide adequate
>> voltage for
>> the CPU when coming out of reset at 800Mhz.
>>
>> This uses a new device-tree property 'fsl,ext-reset-output' to
>> indicate the
>> board has such a reset and to cause the watchdog to be configured to
>> assert
>> WDOG_B instead of an internal reset both on a watchdog timeout and in
>> system_restart.
>>
>> [1]
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/333689.html
>>
>>
>> Cc: Fabio Estevam <festevam@gmail.com>
>> Cc: Lucas Stach <l.stach@pengutronix.de>
>> Cc: Stefan Roese <sr@denx.de>
>> Cc: Iain Paton <ipaton0@gmail.com>
>> Cc: Sascha Hauer <s.hauer@pengutronix.de>
>> Cc: Akshay Bhat <akshay.bhat@timesys.com>
>> Cc: Guenter Roeck <linux@roeck-us.net>
>> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
>> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
>> Acked-by: Shawn Guo <shawn.guo@linaro.org>
>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
>
Hi Wim,
When will this patch be applied to the watchdog maintainers git tree? I
have another board that can use this feature and I am guessing I should
wait before for the above patch to be applied before submitting mine.
Thanks,
Akshay
WARNING: multiple messages have this Message-ID (diff)
From: akshay.bhat@timesys.com (Akshay Bhat)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 1/2] watchdog: imx2_wdt: add external reset support via dt prop
Date: Mon, 18 Apr 2016 12:05:10 -0400 [thread overview]
Message-ID: <571505B6.7030808@timesys.com> (raw)
In-Reply-To: <570704E1.6010700@roeck-us.net>
On 04/07/2016 09:09 PM, Guenter Roeck wrote:
> On 04/01/2016 08:16 AM, Tim Harvey wrote:
>> The IMX6 watchdog supports assertion of a signal (WDOG_B) which
>> can be pinmux'd to an external pin. This is typically used for boards
>> that
>> have PMIC's in control of the IMX6 power rails. In fact, failure to use
>> such an external reset on boards with external PMIC's can result in
>> various
>> hangs due to the IMX6 not being fully reset [1] as well as the board
>> failing
>> to reset because its PMIC has not been reset to provide adequate
>> voltage for
>> the CPU when coming out of reset at 800Mhz.
>>
>> This uses a new device-tree property 'fsl,ext-reset-output' to
>> indicate the
>> board has such a reset and to cause the watchdog to be configured to
>> assert
>> WDOG_B instead of an internal reset both on a watchdog timeout and in
>> system_restart.
>>
>> [1]
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/333689.html
>>
>>
>> Cc: Fabio Estevam <festevam@gmail.com>
>> Cc: Lucas Stach <l.stach@pengutronix.de>
>> Cc: Stefan Roese <sr@denx.de>
>> Cc: Iain Paton <ipaton0@gmail.com>
>> Cc: Sascha Hauer <s.hauer@pengutronix.de>
>> Cc: Akshay Bhat <akshay.bhat@timesys.com>
>> Cc: Guenter Roeck <linux@roeck-us.net>
>> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
>> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
>> Acked-by: Shawn Guo <shawn.guo@linaro.org>
>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
>
Hi Wim,
When will this patch be applied to the watchdog maintainers git tree? I
have another board that can use this feature and I am guessing I should
wait before for the above patch to be applied before submitting mine.
Thanks,
Akshay
next prev parent reply other threads:[~2016-04-18 16:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-01 15:16 [PATCH v5 0/2] imx6: Implement external watchdog reset Tim Harvey
2016-04-01 15:16 ` Tim Harvey
2016-04-01 15:16 ` [PATCH v5 1/2] watchdog: imx2_wdt: add external reset support via dt prop Tim Harvey
2016-04-01 15:16 ` Tim Harvey
2016-04-01 16:31 ` Akshay Bhat
2016-04-01 16:31 ` Akshay Bhat
2016-04-08 1:09 ` Guenter Roeck
2016-04-08 1:09 ` Guenter Roeck
2016-04-18 16:05 ` Akshay Bhat [this message]
2016-04-18 16:05 ` Akshay Bhat
2016-05-14 16:38 ` Wim Van Sebroeck
2016-04-01 15:16 ` [PATCH v5 2/2] ARM: dts: imx: ventana: Add wdt ext-reset support Tim Harvey
2016-04-01 15:16 ` Tim Harvey
2016-04-08 1:10 ` Guenter Roeck
2016-04-08 1:10 ` Guenter Roeck
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