drivers: gpio: siwx917: Add GPIO driver

Implement GPIO driver for HP, ULP and UULP GPIOs.

Signed-off-by: Aksel Skauge Mellbye <[email protected]>

boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts

@@ -6,6 +6,8 @@
 
 /dts-v1/;
 #include <silabs/siwg917m111mgtba.dtsi>
+#include <dt-bindings/gpio/gpio.h>
+#include <zephyr/dt-bindings/input/input-event-codes.h>
 
 / {
 	model = "Silicon Labs BRD4338A (SiWG917 Radio Board)";
@@ -17,6 +19,36 @@
 		zephyr,console = &ulpuart0;
 		zephyr,shell-uart = &ulpuart0;
 	};
+
+	aliases {
+		led0 = &led0;
+		led1 = &led1;
+		sw0 = &button0;
+		sw1 = &button1;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led0: led_0 {
+			gpios = <&gpioulp 2 GPIO_ACTIVE_HIGH>;
+		};
+
+		led1: led_1 {
+			gpios = <&gpioa 10 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	buttons {
+		compatible = "gpio-keys";
+		button0: button_0 {
+			gpios = <&gpiouulp 2 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+		button1: button_1 {
+			gpios = <&gpioa 11 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_1>;
+		};
+	};
 };
 
 &ulpuart0 {

drivers/CMakeLists.txt

@@ -1,4 +1,5 @@
 # Copyright (c) 2024 Silicon Laboratories Inc.
 # SPDX-License-Identifier: Apache-2.0
 
+add_subdirectory(gpio)
 add_subdirectory(pinctrl)

drivers/gpio/CMakeLists.txt

@@ -0,0 +1,5 @@
+# Copyright (c) 2024 Silicon Laboratories Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library_sources_ifdef(CONFIG_GPIO_SILABS_SIWX917 gpio_silabs_siwx917.c)
+zephyr_library_sources_ifdef(CONFIG_GPIO_SILABS_SIWX917_UULP gpio_silabs_siwx917_uulp.c)

drivers/gpio/Kconfig

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Silicon Laboratories Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+if GPIO
+
+rsource "Kconfig.siwx917"
+
+endif

drivers/gpio/Kconfig.siwx917

@@ -0,0 +1,16 @@
+# Copyright (c) 2024 Silicon Laboratories Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config GPIO_SILABS_SIWX917
+	bool "Silabs SiWx917 GPIO driver"
+	default y
+	depends on DT_HAS_SILABS_SIWX917_GPIO_ENABLED
+	help
+	  Enable the HP/ULP GPIO driver for the Silabs SiWx917 SoC series.
+
+config GPIO_SILABS_SIWX917_UULP
+	bool "Silabs SiWx917 UULP GPIO driver"
+	default y
+	depends on DT_HAS_SILABS_SIWX917_GPIO_UULP_ENABLED
+	help
+	  Enable the UULP GPIO driver for the Silabs SiWx917 SoC series.