From: Shawn Guo <shawnguo@kernel.org>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: s.riedmueller@phytec.de, chf.fritz@googlemail.com,
robh+dt@kernel.org, kernel@pengutronix.de, c.hemp@phytec.de,
contact@stefanchrist.eu, s.christ@phytec.de,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] ARM: dts: imx6: phycore-som: explicit disable pmic watchdog during suspend
Date: Wed, 11 Mar 2020 15:37:07 +0800 [thread overview]
Message-ID: <20200311073707.GQ29269@dragon> (raw)
In-Reply-To: <20200227110605.22144-1-m.felsch@pengutronix.de>
On Thu, Feb 27, 2020 at 12:06:04PM +0100, Marco Felsch wrote:
> By default the phycore-som has support for two watchdog devices: 1st the
> internal imx6 watchdog and 2nd the DA9062 PMIC watchdog. According [1]
> the PMIC watchdog is used as boot watchdog. It is common to use this
> watchdog during "system up" time too. Furthermore the PMIC watchdog can
> be used to address ERR007117 since the phycore-som can be equipped with
> NAND or eMMC storage.
>
> The PMIC watchdog can be enabled/disabled by the PMIC itself if the PMIC
> enters POWERDOWN mode or by the host. The PMIC powerdown mode can't be
> used due to the PCB design. So the watchdog is still enabled during a
> suspend which causes a system reset. We need to tell the driver to
> disable the watchdog during a system suspend and to reenable it upon a
> resume to fix this.
>
> [1] https://git.pengutronix.de/cgit/barebox/tree/arch/arm/dts/imx6qdl-phytec-phycore-som.dtsi#n73
>
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Applied, thanks.
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prev parent reply other threads:[~2020-03-11 7:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-27 11:06 [PATCH 1/2] ARM: dts: imx6: phycore-som: explicit disable pmic watchdog during suspend Marco Felsch
2020-02-27 11:06 ` [PATCH 2/2] ARM: dts: imx6: phycore-som: add da9062 gpio support Marco Felsch
2020-03-11 7:41 ` Shawn Guo
2020-03-11 7:37 ` Shawn Guo [this message]
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