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power: ds2746: Add procfs interface for fast charge

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This commit is contained in:
marc1706
2012-08-05 22:55:20 +02:00
committed by tytung
parent bc9444ab04
commit 83bc93927f
1 changed files with 66 additions and 4 deletions
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70
drivers/power/ds2746_battery.c
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@@ -46,6 +46,8 @@ Original Auther:
/*#include "../w1/slaves/w1_ds2784.h"*/
#include <linux/time.h>
#include <linux/rtc.h>
#include <linux/proc_fs.h>
#include <asm/uaccess.h>
struct ds2746_device_info {
@@ -64,6 +66,45 @@ struct ds2746_device_info {
};
static struct wake_lock vbus_wake_lock;
/*
* proc_fs interface for fast charge
* by marc1706
*/
#define PROC_FAST_CHARGE_NAME "fast_charge"
static struct proc_dir_entry *fast_charge;
static int allow_fast_charge = 0;
static int proc_read_fast_charge(char *page, char **start, off_t off, int count,
int *eof, void *data)
{
int ret;
ret = sprintf(page, "%i\n", allow_fast_charge);
return ret;
}
static int proc_write_fast_charge(struct file *file, const char *buffer,
unsigned long count, void *data)
{
char temp_buff[count + 1];
int ret;
int len = count;
if (copy_from_user(temp_buff, buffer, len))
return -EFAULT;
sscanf(temp_buff, "%i", &ret);
if (!ret || ret == 1)
allow_fast_charge = ret;
else
printk(KERN_ALERT "%s: Incorrect value:%i\n", __func__, ret);
return ret;
}
/*========================================================================================
HTC power algorithm helper member and functions
@@ -279,10 +320,18 @@ static BOOL is_charging_avaiable(void)
static BOOL is_high_current_charging_avaialable(void)
{
if (!poweralg.protect_flags.is_charging_high_current_avaialble) return FALSE;
//if (!poweralg.is_china_ac_in) return FALSE; /* allow high current charging on china chargers */
if (poweralg.charge_state == CHARGE_STATE_UNKNOWN) return FALSE;
return TRUE;
bool ret;
if (!poweralg.protect_flags.is_charging_high_current_avaialble)
ret = FALSE;
else if (!poweralg.is_china_ac_in && !allow_fast_charge)
ret = FALSE;
else if (poweralg.charge_state == CHARGE_STATE_UNKNOWN)
ret = FALSE;
else
ret = TRUE;
return ret;
}
static void update_next_charge_state(void)
@@ -1245,6 +1294,19 @@ static int __init ds2746_battery_init(void)
return ret;
}
fast_charge = create_proc_entry(PROC_FAST_CHARGE_NAME, 0644, NULL);
if (fast_charge == NULL) {
remove_proc_entry(PROC_FAST_CHARGE_NAME, NULL);
printk(KERN_ALERT "%s: Unable to create /proc/%s\n", __func__,
PROC_FAST_CHARGE_NAME);
}
fast_charge->read_proc = proc_read_fast_charge;
fast_charge->write_proc = proc_write_fast_charge;
fast_charge->uid = 0;
fast_charge->gid = 0;
printk(KERN_INFO "/proc/%s created\n", PROC_FAST_CHARGE_NAME);
/*mutex_init(&htc_batt_info.lock);*/
return platform_driver_register(&ds2746_battery_driver);
}