arm: dts: imx8m*-venice: add gpio hog support

Add gpio hog support for board-specific gpio lines:
- put hogs in u-boot.dtsi so as to keep the regular dts files
  in sync with the kernel. The hogs will not be put in the kernel
  as that makes them un-usable by userspace as well as
  re-initializes them to dt defaults overriding changes which may
  have been done by bootloader commands.
- specify gpio names and initial config
- enable GPIO_HOG

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Acked-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/arch/arm/dts/imx8mn-venice-gw7902-u-boot.dtsi b/arch/arm/dts/imx8mn-venice-gw7902-u-boot.dtsi
index b334b56b82..9431e2a6cd 100644
--- a/arch/arm/dts/imx8mn-venice-gw7902-u-boot.dtsi
+++ b/arch/arm/dts/imx8mn-venice-gw7902-u-boot.dtsi
@@ -5,6 +5,114 @@
 
 #include "imx8mn-venice-u-boot.dtsi"
 
+&gpio1 {
+	m2rst {
+		gpio-hog;
+		output-low;
+		gpios = <13 GPIO_ACTIVE_HIGH>;
+		line-name = "m2_reset";
+	};
+
+	m2wdis {
+		gpio-hog;
+		output-high;
+		gpios = <15 GPIO_ACTIVE_HIGH>;
+		line-name = "m2_wdis#";
+	};
+};
+
+&gpio2 {
+	uart2en {
+		gpio-hog;
+		output-high;
+		gpios = <8 GPIO_ACTIVE_HIGH>;
+		line-name = "uart2_en#";
+	};
+};
+
+&gpio3 {
+	m2gdis {
+		gpio-hog;
+		output-high;
+		gpios = <1 GPIO_ACTIVE_HIGH>;
+		line-name = "m2_gdis#";
+	};
+
+	m2off {
+		gpio-hog;
+		output-high;
+		gpios = <7 GPIO_ACTIVE_HIGH>;
+		line-name = "m2_off#";
+	};
+};
+
+&gpio4 {
+	appgpio1 {
+		gpio-hog;
+		input;
+		gpios = <21 GPIO_ACTIVE_HIGH>;
+		line-name = "app_gpio1";
+	};
+
+	uart1rs485 {
+		gpio-hog;
+		output-low;
+		gpios = <23 GPIO_ACTIVE_HIGH>;
+		line-name = "uart1_rs485";
+	};
+
+	uart1term {
+		gpio-hog;
+		output-low;
+		gpios = <25 GPIO_ACTIVE_HIGH>;
+		line-name = "uart1_term";
+	};
+
+	uart1half {
+		gpio-hog;
+		output-low;
+		gpios = <26 GPIO_ACTIVE_HIGH>;
+		line-name = "uart1_half";
+	};
+
+	appgpio2 {
+		gpio-hog;
+		input;
+		gpios = <27 GPIO_ACTIVE_HIGH>;
+		line-name = "app_gpio2";
+	};
+
+	mipigpio1 {
+		gpio-hog;
+		input;
+		gpios = <28 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio1";
+	};
+};
+
+&gpio5 {
+	mipigpio4 {
+		gpio-hog;
+		input;
+		gpios = <3 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio4";
+	};
+
+	mipigpio3 {
+		gpio-hog;
+		input;
+		gpios = <4 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio3";
+	};
+
+	mipigpio2 {
+		gpio-hog;
+		input;
+		gpios = <5 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio2";
+	};
+};
+
 &fec1 {
 	phy-reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
 	phy-reset-duration = <1>;