add raspi2 and raspi3 BSP

bsp/raspberry-pi/raspi3-32/driver/drv_gpio.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2019-07-29     zdzn           first version
+ */
+
+#ifndef __DRV_GPIO_H__
+#define __DRV_GPIO_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include "interrupt.h"
+#include "board.h"
+
+#define GPIO_IRQ_NUM 3
+
+#define IRQ_GPIO0               49
+#define IRQ_GPIO1               50
+#define IRQ_GPIO2               51
+#define IRQ_GPIO3               52
+
+struct gpio_irq_def
+{
+    void  *irq_arg[32];
+    void (*irq_cb[32])(void *param);
+    rt_uint8_t irq_type[32];
+};
+
+enum gpio_irq_clock
+{
+    GPIO_IRQ_LOSC_32KHZ = 0,
+    GPIO_IRQ_HOSC_24MHZ
+};
+
+int rt_hw_gpio_init(void);
+
+#endif /* __DRV_GPIO_H__ */