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, 81 insertions, 0 deletions

diff --git a/arch/arm/dts/imx8mm-venice-gw72xx-0x-u-boot.dtsi b/arch/arm/dts/imx8mm-venice-gw72xx-0x-u-boot.dtsi
index f5d52c2fe2..92e44d4ba9 100644
--- a/arch/arm/dts/imx8mm-venice-gw72xx-0x-u-boot.dtsi
+++ b/arch/arm/dts/imx8mm-venice-gw72xx-0x-u-boot.dtsi
@@ -3,3 +3,84 @@
  * Copyright 2021 Gateworks Corporation
  */
 #include "imx8mm-venice-gw700x-u-boot.dtsi"
+
+&gpio1 {
+	rs485_term {
+		gpio-hog;
+		output-low;
+		gpios = <0 GPIO_ACTIVE_HIGH>;
+		line-name = "rs485_term";
+	};
+
+	mipi_gpio4 {
+		gpio-hog;
+		input;
+		gpios = <1 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio4";
+	};
+
+	pci_usb_sel {
+		gpio-hog;
+		output-low;
+		gpios = <6 GPIO_ACTIVE_HIGH>;
+		line-name = "pci_usb_sel";
+	};
+
+	dio_0 {
+		gpio-hog;
+		input;
+		gpios = <7 GPIO_ACTIVE_HIGH>;
+		line-name = "dio0";
+	};
+
+	dio_1 {
+		gpio-hog;
+		input;
+		gpios = <9 GPIO_ACTIVE_HIGH>;
+		line-name = "dio1";
+	};
+};
+
+&gpio4 {
+	rs485_en {
+		gpio-hog;
+		output-low;
+		gpios = <0 GPIO_ACTIVE_HIGH>;
+		line-name = "rs485_en";
+	};
+
+	mipi_gpio3 {
+		gpio-hog;
+		input;
+		gpios = <1 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio3";
+	};
+
+	rs485_half {
+		gpio-hog;
+		output-low;
+		gpios = <2 GPIO_ACTIVE_HIGH>;
+		line-name = "rs485_hd";
+	};
+
+	mipi_gpio2 {
+		gpio-hog;
+		input;
+		gpios = <3 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio2";
+	};
+
+	mipi_gpio1 {
+		gpio-hog;
+		input;
+		gpios = <4 GPIO_ACTIVE_HIGH>;
+		line-name = "mipi_gpio1";
+	};
+
+	pci_wdis {
+		gpio-hog;
+		output-high;
+		gpios = <7 GPIO_ACTIVE_HIGH>;
+		line-name = "pci_wdis#";
+	};
+};