linux-kernel - [PATCH 5.14 037/125] arm64: dts: imx8mm-kontron: Fix polarity of reg_rst

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Date:   Mon,  1 Nov 2021 10:16:50 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        Shawn Guo <shawnguo@...nel.org>
Subject: [PATCH 5.14 037/125] arm64: dts: imx8mm-kontron: Fix polarity of reg_rst_eth2

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

commit 6562d6e350284307e33ea10c7f46a6661ff22770 upstream.

The regulator reg_rst_eth2 should keep the reset signal of the USB ethernet
adapter deasserted anytime. Fix the polarity and mark it as always-on.

Anyway, using the regulator is only a workaround for the missing support of
specifying a reset GPIO for USB devices in a generic way. As we don't
have a solution for this at the moment, at least fix the current
workaround.

Fixes: 8668d8b2e67f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards")
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/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
@@ -70,7 +70,9 @@
 		regulator-name = "rst-usb-eth2";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_usb_eth2>;
-		gpio = <&gpio3 2 GPIO_ACTIVE_LOW>;
+		gpio = <&gpio3 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
 	};
 
 	reg_vdd_5v: regulator-5v {