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Battery life extender patch from tni.andro

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Signed-off-by: flar2 <asegaert@gmail.com>
This commit is contained in:
flar2 2013-10-10 22:26:15 -04:00 committed by followmsi
parent 65a6363b57
commit 40861c769c
1 changed files with 49 additions and 6 deletions
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55
drivers/power/smb345-charger.c
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@ -119,6 +119,9 @@ extern int bq27541_battery_callback(unsigned usb_cable_state);
extern int bq27541_wireless_callback(unsigned wireless_state);
extern void touch_callback(unsigned cable_status);
static ssize_t smb345_reg_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t smb345_float_voltage_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t smb345_float_voltage_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
/* Global variables */
static struct smb345_charger *charger;
@ -132,12 +135,16 @@ extern int ac_on;
extern int usb_on;
static bool wpc_en;
static bool disable_DCIN;
static int float_volt_setting = 4300;
/* Sysfs interface */
static DEVICE_ATTR(reg_status, S_IWUSR | S_IRUGO, smb345_reg_show, NULL);
static DEVICE_ATTR(float_voltage, 0644, smb345_float_voltage_show,
smb345_float_voltage_store);
static struct attribute *smb345_attributes[] = {
&dev_attr_reg_status.attr,
&dev_attr_float_voltage.attr,
NULL
};
@ -942,6 +949,30 @@ static ssize_t smb345_reg_show(struct device *dev, struct device_attribute *attr
return strlen(buf);
}
static ssize_t smb345_float_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%u\n", float_volt_setting);
}
/* Set charger float voltage; desired value in mV. */
static ssize_t smb345_float_voltage_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int val = 0;
if(kstrtoint(buf, 0, &val) != 0)
goto error;
val = (val / 20) * 20; /* the charger can only do 20mV increments */
if(val < 3800 || val > 4300)
goto error;
float_volt_setting = val;
return count;
error:
return -EINVAL;
}
static int smb345_otg_setting(struct i2c_client *client)
{
int ret;
@ -1101,6 +1132,18 @@ int smb345_config_thermal_charging(int temp, int volt, int rule)
struct i2c_client *client = charger->client;
int ret = 0, retval, setting = 0;
int BAT_Mid_Temp = BAT_Mid_Temp_Wired;
/*Charger float voltage for normal temperature conditions. Default 4.3V.*/
int flt_volt_43 = FLOAT_VOLT_43V;
/*Charger float voltage for high temperature conditions. Default 4.1V.*/
int flt_volt_low = FLOAT_VOLT_LOW;
flt_volt_43 = (float_volt_setting - 3500) / 20;
if(flt_volt_43 < 0 || flt_volt_43 > FLOAT_VOLT_43V) {
SMB_NOTICE("BUG: Invalid float voltage setting calculated: %d\n", flt_volt_43);
flt_volt_43 = FLOAT_VOLT_43V;
}
if(flt_volt_low > flt_volt_43) flt_volt_low = flt_volt_43;
if (rule == THERMAL_RULE1)
BAT_Mid_Temp = BAT_Mid_Temp_Wired;
@ -1130,10 +1173,10 @@ int smb345_config_thermal_charging(int temp, int volt, int rule)
if (temp <= BAT_Mid_Temp
|| (temp > BAT_Mid_Temp && volt > FLOAT_VOLT_LOW_DECIMAL)
|| temp > BAT_Hot_Limit) {
if (setting != FLOAT_VOLT_43V) {
if (setting != flt_volt_43) {
setting = retval & (~FLOAT_VOLT_MASK);
setting |= FLOAT_VOLT_43V;
SMB_NOTICE("Set Float Volt, retval=%x setting=%x\n", retval, setting);
setting |= flt_volt_43;
SMB_NOTICE("Set Float Volt, retval=%x setting=%x V=%dmV\n", retval, setting, float_volt_setting);
ret = smb345_write(client, smb345_FLOAT_VLTG, setting);
if (ret < 0) {
dev_err(&client->dev, "%s(): Failed in writing 0x%02x to register"
@ -1141,11 +1184,11 @@ int smb345_config_thermal_charging(int temp, int volt, int rule)
goto error;
}
} else
SMB_NOTICE("Bypass set Float Volt=%x\n", retval);
SMB_NOTICE("Bypass set Float Volt setting=%x V=%dmV\n", retval, float_volt_setting);
} else {
if (setting != FLOAT_VOLT_LOW) {
if (setting != flt_volt_low) {
setting = retval & (~FLOAT_VOLT_MASK);
setting |= FLOAT_VOLT_LOW;
setting |= flt_volt_low;
SMB_NOTICE("Set Float Volt, retval=%x setting=%x\n", retval, setting);
ret = smb345_write(client, smb345_FLOAT_VLTG, setting);
if (ret < 0) {