MTK camera info文件节点添加

MTK camera info文件节点添加

1.proc file创建function：

struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
struct proc_dir_entry *parent,
const struct file_operations *proc_fops, void *data)；

2.废话少说，直接上fucking code：

#include <linux/string.h>
#include <asm/uaccess.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/miscdevice.h>

static int front_camera_otp_flag;
static int rear_camera_otp_flag;

static char front_camera_module_name[15];
static char rear_camera_module_name[15];

static char front_camera_ic_name[15];
static char rear_camera_ic_name[15];

void lct_camera_set_proc_otpinfo_flag(int index, int flag)
{
if (index == 0) {
rear_camera_otp_flag = flag;
} else if (index == 1) {
front_camera_otp_flag = flag;
}
}

void lct_camera_set_proc_camera_name(int index, char *module_name, char *ic_name)
{
if (index == 0) {
strcpy(rear_camera_module_name, module_name);
strcpy(rear_camera_ic_name, ic_name);
} else if (index == 1) {
strcpy(front_camera_module_name, module_name);
strcpy(front_camera_ic_name, ic_name);
}
}

static ssize_t camera_proc_camera_info_read(struct file *file, char __user *buff, size_t size, loff_t *ppos)
{
int cnt = 0;
char *page = NULL;
page = kzalloc(128, GFP_KERNEL);

cnt = sprintf(page, "[FRONT_CAM_Module]:%s,[FRONT_CAM_IC]:%s,[REAR_CAM_Module]:%s,[REAR_CAM_IC]:%s\n", (strlen(front_camera_module_name) ? front_camera_module_name : "NULL"), (strlen(front_camera_ic_name) ? front_camera_ic_name : "NULL"), (strlen(rear_camera_module_name) ? rear_camera_module_name : "NULL"), (strlen(rear_camera_ic_name) ? rear_camera_ic_name : "NULL"));

cnt = simple_read_from_buffer(buff, size, ppos, page, cnt);

kfree(page);

return cnt;
}

static ssize_t camera_proc_camera_otp_info_read(struct file *file, char __user *buff, size_t size, loff_t *ppos)
{
int cnt = 0;
char *page = NULL;
page = kzalloc(128, GFP_KERNEL);

cnt = sprintf(page, "sub :%d,main :%d\n", front_camera_otp_flag, rear_camera_otp_flag);

cnt = simple_read_from_buffer(buff, size, ppos, page, cnt);

kfree(page);

return cnt;
}

static const struct file_operations camera_proc_camera_info_fops = {
.read = camera_proc_camera_info_read,
};

static const struct file_operations camera_proc_camera_otp_info_fops = {
.read = camera_proc_camera_otp_info_read,
};

static int camera_create_proc_entry(void)
{
struct proc_dir_entry *proc_entry_camera;

struct proc_dir_entry *proc_entry_camera_otp;

//creat camera info proc
proc_entry_camera = proc_create_data("camera_info", 0444, NULL, &camera_proc_camera_info_fops, NULL);
if (IS_ERR_OR_NULL(proc_entry_camera)) {
pr_err("%s:%d: add /proc/camera_info error!\n", __func__, __LINE__);
}

//creat camera otp info proc
proc_entry_camera_otp = proc_create_data("otpinfo", 0444, NULL, &camera_proc_camera_otp_info_fops, NULL);
if (IS_ERR_OR_NULL(proc_entry_camera_otp)) {
pr_err("%s:%d: add /proc/camera_otp_info error!\n", __func__, __LINE__);
}

return 0;
}

static int __init lct_camera_info_init(void)
{
camera_create_proc_entry();

return 0;
}

static void __exit lct_camera_info_exit(void)
{
}

module_init(lct_camera_info_init);
module_exit(lct_camera_info_exit);

MODULE_DESCRIPTION("Lct camera info driver");
MODULE_AUTHOR("Koson Liao <liaokesen@longcheer.com>");
MODULE_LICENSE("GPL");