Commit 192f7748 authored by engstk's avatar engstk Committed by arnavpuranik
Browse files

drivers: misc: implement usb fast charge mode



echo 0 /sys/kernel/fast_charge/force_fast_charge (disable)
echo 1 /sys/kernel/fast_charge/force_fast_charge (enable)

Enables force charging up to 900mA in usb mode
Signed-off-by: okta10's avatarOktapra Amtono <oktapra.amtono@gmail.com>
Signed-off-by: arnavpuranik's avatararnavpuranik <puranikarnav@gmail.com>
parent e6b023b7
......@@ -587,6 +587,12 @@ config ANT_CHECK
and the driver provides an API to check if this interrupt
is available on the current PMIC chip.
config FORCE_FAST_CHARGE
bool "Force faster charge rate for USB"
default n
help
This allows users to override default charge rate for USB
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
......
......@@ -67,3 +67,4 @@ obj-y += qcom/
obj-$(CONFIG_QPNP_MISC) += qpnp-misc.o
obj-$(CONFIG_MEMORY_STATE_TIME) += memory_state_time.o
obj-$(CONFIG_ANT_CHECK) += ant_check.o
obj-$(CONFIG_FORCE_FAST_CHARGE) += fastchg.o
/*
* Author: Chad Froebel <chadfroebel@gmail.com>
*
* Port to cheeseburger: engstk <eng.stk@sapo.pt>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
/*
* Possible values for "force_fast_charge" are :
*
* 0 - Disabled (default)
* 1 - Force faster charge
*/
#include <linux/kobject.h>
#include <linux/sysfs.h>
#include <linux/fastchg.h>
#include <linux/string.h>
#include <linux/module.h>
int force_fast_charge = 1;
static int __init get_fastcharge_opt(char *ffc)
{
if (strcmp(ffc, "0") == 0) {
force_fast_charge = 0;
} else if (strcmp(ffc, "1") == 0) {
force_fast_charge = 1;
} else {
force_fast_charge = 0;
}
return 1;
}
__setup("ffc=", get_fastcharge_opt);
static ssize_t force_fast_charge_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
size_t count = 0;
count += sprintf(buf, "%d\n", force_fast_charge);
return count;
}
static ssize_t force_fast_charge_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)
{
sscanf(buf, "%d ", &force_fast_charge);
if (force_fast_charge < 0 || force_fast_charge > 1)
force_fast_charge = 0;
return count;
}
static struct kobj_attribute force_fast_charge_attribute =
__ATTR(force_fast_charge, 0664, force_fast_charge_show, force_fast_charge_store);
static struct attribute *force_fast_charge_attrs[] = {
&force_fast_charge_attribute.attr,
NULL,
};
static struct attribute_group force_fast_charge_attr_group = {
.attrs = force_fast_charge_attrs,
};
/* Initialize fast charge sysfs folder */
static struct kobject *force_fast_charge_kobj;
int force_fast_charge_init(void)
{
int force_fast_charge_retval;
force_fast_charge_kobj = kobject_create_and_add("fast_charge", kernel_kobj);
if (!force_fast_charge_kobj) {
return -ENOMEM;
}
force_fast_charge_retval = sysfs_create_group(force_fast_charge_kobj, &force_fast_charge_attr_group);
if (force_fast_charge_retval)
kobject_put(force_fast_charge_kobj);
if (force_fast_charge_retval)
kobject_put(force_fast_charge_kobj);
return (force_fast_charge_retval);
}
void force_fast_charge_exit(void)
{
kobject_put(force_fast_charge_kobj);
}
module_init(force_fast_charge_init);
module_exit(force_fast_charge_exit);
......@@ -34,6 +34,10 @@ extern int hwc_check_global;
#define LCT_JEITA_CCC_AUTO_ADJUST 0
#endif
#ifdef CONFIG_FORCE_FAST_CHARGE
#include <linux/fastchg.h>
#endif
#define smblib_err(chg, fmt, ...) \
pr_err("%s: %s: " fmt, chg->name, \
__func__, ##__VA_ARGS__) \
......@@ -888,6 +892,13 @@ static int set_sdp_current(struct smb_charger *chg, int icl_ua)
u8 icl_options;
const struct apsd_result *apsd_result = smblib_get_apsd_result(chg);
#ifdef CONFIG_FORCE_FAST_CHARGE
if (force_fast_charge > 0 && icl_ua == USBIN_500MA)
{
icl_ua = USBIN_900MA;
}
#endif
/* power source is SDP */
switch (icl_ua) {
case USBIN_100MA:
......
/*
* Author: Chad Froebel <chadfroebel@gmail.com>
*
* Port to cheeseburger: engstk <eng.stk@sapo.pt>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _LINUX_FASTCHG_H
#define _LINUX_FASTCHG_H
extern int force_fast_charge;
#endif
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