节点
/*
*
* Use of source code is subject to the terms of the LeadCore license agreement under
* which you licensed source code. If you did not accept the terms of the license agreement,
* you are not authorized to use source code. For the terms of the license, please see the
* license agreement between you and LeadCore.
*
* Copyright (c) 2010-2019 LeadCoreTech Corp.
*
* PURPOSE: This files contains the comip sysfs driver.
*
* CHANGE HISTORY:
*
* Version Date Author Description
* 1.0.0 2012-03-06 zouqiao created
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <mach/gpio.h>
#include <plat/mfp.h>
#include <plat/bootinfo.h>
#include <plat/comip-pmic.h>
//#include <plat/lc1160_codec.h>
#define comip_attr(_name, _mode)
static struct kobj_attribute _name##_attr = {
.attr = {
.name = __stringify(_name),
.mode = _mode,
},
.show = _name##_show,
.store = _name##_store,
}
// int flage=0;
/*
Setting value : Voltage(mv)
0 : 0
1 : 1800
2 : 3000
3 : 5000
*/
static ssize_t torch_enable_show(struct kobject *kobj, struct kobj_attribute *attr, char * buf)
{
int ret;
int value;
int voltage = -1;
//ret = pmic_voltage_get(PMIC_POWER_USIM, 0, &voltage);
if (ret)
return ret;
/*switch(voltage) {
case 0:
value = 0;
break;
case 1800:
value = 1;
break;
case 3000:
value = 2;
break;
case 5000:
default:
return -EINVAL;
}*/
return sprintf(buf, "%d", value);
}
static ssize_t torch_enable_store(struct kobject *kobj, struct kobj_attribute *attr, const char * buf, size_t n)
{
char *endp;
//int ret;
int value;
static int torch_switch= mfp_to_gpio(175);
static int torch_switch_Flash_EN= mfp_to_gpio(211);
static int torch_switch_Flash= mfp_to_gpio(210);
gpio_request(torch_switch, "torch_switch switch");
gpio_request(torch_switch_Flash_EN, "torch_switch Enable");
gpio_request(torch_switch_Flash, "torch_switch Flash");
gpio_direction_output(torch_switch_Flash_EN, 0);
gpio_direction_output(torch_switch_Flash, 0);
value = simple_strtoul(buf, &endp, 0);
printk("[young12]:comip-sysfs-torch.c torch_enable_store!!!n");
printk("[young12]:value %d !!!!n",value);
if (buf == endp)
return -EINVAL;
switch(value) {
case 1:
printk("[young12]:hub_torch_tf_switch high!!!!n");
gpio_direction_output(torch_switch_Flash_EN, 1);
gpio_direction_output(torch_switch, 1);
break;
case 2:
printk("[young12]:hub_torch_tf_switch low!!!!n");
gpio_direction_output(torch_switch, 0);
gpio_direction_output(torch_switch_Flash_EN, 0);
break;
default:
return -EINVAL;
}
gpio_free(torch_switch);
gpio_free(torch_switch_Flash);
return n;
}
/*extern int get_flage_kernel_value()
{
printk("[young]: flage %d!!!!n",flage);
return flage;
}*/
comip_attr(torch_enable, 0644);
static struct kobject *comip_kobj = NULL;
static struct attribute * comip_attrs[] = {
&torch_enable_attr.attr,
NULL,
};
static struct attribute_group comip_attr_group = {
.attrs = comip_attrs,
};
static int __init comip_sysfs_init(void)
{
int ret = -ENOMEM;
int event = PMIC_RTC_ALARM_POWEROFF ? PMIC_EVENT_RTC2 : PMIC_EVENT_RTC1;
comip_kobj = kobject_create_and_add("comip_torch", NULL); //节点位置？
if (comip_kobj == NULL) {
printk(KERN_ERR "comip_sysfs_init: kobject_create_and_add failed.n");
goto kobject_create_failed;
}
ret = sysfs_create_group(comip_kobj, &comip_attr_group);
if (ret) {
printk(KERN_ERR "comip_sysfs_init: sysfs_create_group failed.n");
goto sysfs_create_failed;
}
return ret;
sysfs_create_failed:
kobject_del(comip_kobj);
kobject_create_failed:
pmic_callback_mask(event);
pmic_callback_unregister(event);
failed:
return ret;
}
static void __exit comip_sysfs_exit(void)
{
int event = PMIC_RTC_ALARM_POWEROFF ? PMIC_EVENT_RTC2 : PMIC_EVENT_RTC1;
pmic_callback_mask(event);
pmic_callback_unregister(event);
if (comip_kobj) {
sysfs_remove_group(comip_kobj, &comip_attr_group);
kobject_del(comip_kobj);
comip_kobj = NULL;
}
}
module_init(comip_sysfs_init);
module_exit(comip_sysfs_exit);
MODULE_AUTHOR("Jimmy <jimm.yang@ifiretech.com>");
MODULE_DESCRIPTION("COMIP sysfs");
MODULE_LICENSE("GPL");
