From: Schrempf Frieder <frieder.schrempf@kontron.de>
To: Fabio Estevam <festevam@gmail.com>,
Schrempf Frieder <frieder.schrempf@kontron.de>,
Krzysztof Kozlowski <krzk@kernel.org>,
"NXP Linux Team" <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Rob Herring <robh+dt@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>
Cc: "stable@vger.kernel.org" <stable@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Rob Herring <robh@kernel.org>
Subject: [PATCH 2/2] ARM: dts: Change WDOG_ANY signal from push-pull to open-drain
Date: Thu, 28 May 2020 14:43:43 +0000 [thread overview]
Message-ID: <20200528144312.25980-2-frieder.schrempf@kontron.de> (raw)
In-Reply-To: <20200528144312.25980-1-frieder.schrempf@kontron.de>
From: Frieder Schrempf <frieder.schrempf@kontron.de>
The WDOG_ANY signal is connected to the RESET_IN signal of the SoM
and baseboard. It is currently configured as push-pull, which means
that if some external device like a programmer wants to assert the
RESET_IN signal by pulling it to ground, it drives against the high
level WDOG_ANY output of the SoC.
To fix this we set the WDOG_ANY signal to open-drain configuration.
That way we make sure that the RESET_IN can be asserted by the
watchdog as well as by external devices.
Fixes: 1ea4b76cdfde ("ARM: dts: imx6ul-kontron-n6310: Add Kontron i.MX6UL N6310 SoM and boards")
Cc: stable@vger.kernel.org
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
---
arch/arm/boot/dts/imx6ul-kontron-n6x1x-som-common.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/imx6ul-kontron-n6x1x-som-common.dtsi b/arch/arm/boot/dts/imx6ul-kontron-n6x1x-som-common.dtsi
index fc316408721d..61ba21a605a8 100644
--- a/arch/arm/boot/dts/imx6ul-kontron-n6x1x-som-common.dtsi
+++ b/arch/arm/boot/dts/imx6ul-kontron-n6x1x-som-common.dtsi
@@ -116,7 +116,7 @@
pinctrl_wdog: wdoggrp {
fsl,pins = <
- MX6UL_PAD_GPIO1_IO09__WDOG1_WDOG_ANY 0x30b0
+ MX6UL_PAD_GPIO1_IO09__WDOG1_WDOG_ANY 0x18b0
>;
};
};
--
2.17.1
next prev parent reply other threads:[~2020-05-28 14:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-28 14:43 [PATCH 1/2] ARM: dts: Move watchdog from Kontron i.MX6UL/ULL board to SoM Schrempf Frieder
2020-05-28 14:43 ` Schrempf Frieder [this message]
2020-06-23 3:40 ` [PATCH 2/2] ARM: dts: Change WDOG_ANY signal from push-pull to open-drain Shawn Guo
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