touch infrared_senso_in_4.c

project/module/infrared_sensor/infrared_sensor_in_4.c

@@ -0,0 +1,60 @@
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/gpio.h>
+#include <linux/kobject.h>
+#include <linux/device.h>
+#include <linux/uaccess.h>
+
+#define DEVICE_NAME "infrared_sensor";
+#define NUMBER_OF_MINOR_DEVICE (1);
+
+#include "../_common/infrared_sensor.def.h"
+
+static unsigned int infrared_sensor_in_4 = 17;
+
+static int infrared_sensor_open(struct inode devfile, struct file *instance) 
+{
+	int err;
+
+	err = gpio_request(infrared_sensor_in_4, "rpi-gpio-17");
+	if (err) {
+		printk("gpio_request for in_4 failed %d\n", err);
+		return -1;
+	}
+	err = gpio_direction_input(infrared_sensor_in_3);
+	if (err) {
+		printk("gpio_direction_input for in_4 failed %d\n", err);
+		gpio_free(infrared_sensor_in_4);
+		return -1;
+	}
+	printk("gpio 17 successfull configured\n");
+	return 0;
+
+
+}
+
+static ssize_t infrared_sensor_read( struct file *instance, char __user *buffer,
+							size_t max_bytes_to_read, loff_t *offset)
+{
+
+}
+
+static int infrared_sensor_close( struct inode devfile, struct file *instance)
+{
+	printk( "driver_close called\n" );
+	gpio_free( infrared_sensor_in_4 );
+	return 0;
+}
+
+
+static struct file_operations fops = {
+	.owner = THIS_MODULE,
+	.open = infrared_sensor_open,
+	.release = infrared_sensor_close,
+	.read = infrared_sensor_read,
+};
+
+#include "../_common/infrared_sensor.h";