feat(iface/gpio): Introduce GPIO interface

Author: iqyx

services/interfaces/gpio.h

@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * GPIO interface
+ *
+ * Copyright (c) 2024, Marek Koza (qyx@krtko.org)
+ * All rights reserved.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef enum {
+	GPIO_RET_OK = 0,
+	GPIO_RET_FAILED,
+} gpio_ret_t;
+
+enum gpio_mode {
+	MODE_INPUT,
+	MODE_OUTPUT,
+	MODE_ALTERNATE,
+	MODE_ANALOG,
+};
+
+enum gpio_pull {
+	PULL_NONE,
+	PULL_WEAK,
+	PULL_STRONG,
+};
+
+enum gpio_otype {
+	OTYPE_PP,
+	OTYPE_OD,
+};
+
+typedef struct gpio Gpio;
+
+struct gpio_vmt {
+	gpio_ret_t (*set)(Gpio *self, bool state);
+	gpio_ret_t (*get)(Gpio *self, bool *state);
+	gpio_ret_t (*toggle)(Gpio *self);
+	gpio_ret_t (*set_mode)(Gpio *self, enum gpio_mode mode);
+	gpio_ret_t (*set_pinmux)(Gpio *self, uint32_t mux);
+	gpio_ret_t (*set_pull)(Gpio *self, enum gpio_pull pull);
+	gpio_ret_t (*set_otype)(Gpio *self, enum gpio_otype otype);
+};
+
+
+typedef struct gpio {
+	const struct gpio_vmt *vmt;
+	void *parent;
+} Gpio;
+