From: akshay.bhat@timesys•com (Akshay Bhat)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v3 0/2] imx6: Implement external watchdog reset
Date: Fri, 30 Oct 2015 13:00:11 -0400 [thread overview]
Message-ID: <5633A21B.2040300@timesys.com> (raw)
In-Reply-To: <1438097230-2653-1-git-send-email-tharvey@gateworks.com>
On 07/28/2015 11:27 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 voltate for
> the CPU when comming out of reset at 800Mhz when it was at 400Mhz prior to
> reset.
>
> This adds a new device-tree property 'ext-reset-output' to fsl-imx-wdt in
> order 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.
>
Hi, was there a reason why this patch did not make it to the upstream
kernel? We would like to use this feature on a Advantech/GE board and I
can rebase the first patch onto the latest linux-next, resubmit if needed.
Thanks, Akshay
> The second patch adds the watchdog configuration and pinmux for Gateworks
> Ventana boards.
>
> I would expect that maintainers of other IMX6 boards that use PMIC's that
> are resettable via WDOG_B to follow-up with similar device-tree patches.
> I've attempted to Cc those individuals here.
>
> [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>
>
> Tim Harvey (2):
> watchdog: imx2_wdt: add external reset support via 'ext-reset-output'
> dt prop
> ARM: dts: ventana: Add ext-reset support
>
> .../devicetree/bindings/watchdog/fsl-imx-wdt.txt | 2 ++
> arch/arm/boot/dts/imx6qdl-gw51xx.dtsi | 12 ++++++++++++
> arch/arm/boot/dts/imx6qdl-gw52xx.dtsi | 12 ++++++++++++
> arch/arm/boot/dts/imx6qdl-gw53xx.dtsi | 13 +++++++++++++
> arch/arm/boot/dts/imx6qdl-gw54xx.dtsi | 17 +++++++++++++++++
> arch/arm/boot/dts/imx6qdl-gw551x.dtsi | 12 ++++++++++++
> arch/arm/boot/dts/imx6qdl-gw552x.dtsi | 12 ++++++++++++
> drivers/watchdog/imx2_wdt.c | 20 ++++++++++++++++++--
> 8 files changed, 98 insertions(+), 2 deletions(-)
>
next prev parent reply other threads:[~2015-10-30 17:00 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-28 22:54 [PATCH 0/2] imx6: Implement external watchdog reset Tim Harvey
2015-05-28 22:54 ` [PATCH 1/2] watchdog: imx2_wdt: add external reset support via 'ext-reset' dt property Tim Harvey
2015-05-29 16:37 ` Lucas Stach
2015-05-28 22:54 ` [PATCH 2/2] ARM: dts: ventana: Add ext-reset support Tim Harvey
2015-05-29 6:17 ` Markus Pargmann
2015-05-29 14:01 ` Tim Harvey
2015-06-04 20:15 ` [PATCH v2 0/2] imx6: Implement external watchdog reset Tim Harvey
2015-06-04 20:15 ` [PATCH v2 1/2] watchdog: imx2_wdt: add external reset support via 'ext-reset-output' dt prop Tim Harvey
2015-06-05 16:38 ` Zhi Li
2015-06-25 23:22 ` Tim Harvey
2015-06-22 9:22 ` Lucas Stach
2015-06-28 15:07 ` Shawn Guo
2015-06-29 1:17 ` Shawn Guo
2015-07-02 16:49 ` Tim Harvey
2015-07-03 1:02 ` Shawn Guo
2015-07-28 15:27 ` [PATCH v3 0/2] imx6: Implement external watchdog reset Tim Harvey
2015-07-28 15:27 ` [PATCH v3 1/2] watchdog: imx2_wdt: add external reset support via 'ext-reset-output' dt prop Tim Harvey
2015-08-05 13:01 ` Shawn Guo
2015-10-13 14:11 ` Tim Harvey
2015-07-28 15:27 ` [PATCH v3 2/2] ARM: dts: ventana: Add ext-reset support Tim Harvey
2015-10-30 17:00 ` Akshay Bhat [this message]
2015-10-30 17:31 ` [PATCH v3 0/2] imx6: Implement external watchdog reset Tim Harvey
2015-06-04 20:16 ` [PATCH v2 2/2] ARM: dts: ventana: Add ext-reset support Tim Harvey
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