linux-kernel - [PATCH 5.7 254/265] ARM: dts: imx6ul-kontron: Change WDOG

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Date:   Mon, 29 Jun 2020 11:18:07 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Frieder Schrempf <frieder.schrempf@...tron.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 5.7 254/265] ARM: dts: imx6ul-kontron: Change WDOG_ANY signal from push-pull to open-drain

From: Frieder Schrempf <frieder.schrempf@...tron.de>

commit d22a16cc92e04d053fd807ef3587e4f135e4206f upstream.

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@...r.kernel.org
Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 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 fc316408721d0..61ba21a605a81 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
 		>;
 	};
 };
-- 
2.25.1