static int cm3663_resume(struct device *dev)
{
/* Turn power back on if we were before suspend. */
struct i2c_client *client = to_i2c_client(dev);
struct cm3663_data *cm3663 = i2c_get_clientdata(client);
/* [S2PLUS] Temporary Patch */
#if defined(CONFIG_MACH_S2PLUS)
struct regulator *regulator;
int ret = 0;
regulator = regulator_get(NULL, "vcc_pls_2.8v");
if (IS_ERR(regulator)) {
printk(KERN_ERR
"vcc_pls_2.8v regulator get err\n");
return -1;
}
if (!regulator_is_enabled(regulator)) {
printk(KERN_ERR "%s: vcc_pls_2.8v is off. so ON\n",
__func__);
ret = regulator_enable(regulator);
}
regulator_put(regulator);
mdelay(100);
#endif
if (cm3663->power_state & LIGHT_ENABLED)
cm3663_light_enable(cm3663);
return 0;
}
static ssize_t light_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct cm3663_data *cm3663 = dev_get_drvdata(dev);
bool new_value;
if (sysfs_streq(buf, "1"))
new_value = true;
else if (sysfs_streq(buf, "0"))
new_value = false;
else {
pr_err("%s: invalid value %d\n", __func__, *buf);
return -EINVAL;
}
mutex_lock(&cm3663->power_lock);
if (new_value && !(cm3663->power_state & LIGHT_ENABLED)) {
cm3663->power_state |= LIGHT_ENABLED;
cm3663_light_enable(cm3663);
} else if (!new_value && (cm3663->power_state & LIGHT_ENABLED)) {
cm3663_light_disable(cm3663);
cm3663->power_state &= ~LIGHT_ENABLED;
}
mutex_unlock(&cm3663->power_lock);
return size;
}
static int cm3663_resume(struct device *dev)
{
/* Turn power back on if we were before suspend. */
struct i2c_client *client = to_i2c_client(dev);
struct cm3663_data *cm3663 = i2c_get_clientdata(client);
if (cm3663->power_state & LIGHT_ENABLED)
cm3663_light_enable(cm3663);
return 0;
}
static ssize_t lightsensor_file_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cm3663_data *cm3663 = dev_get_drvdata(dev);
int adc = 0;
if (!(cm3663->power_state & LIGHT_ENABLED))
cm3663_light_enable(cm3663);
adc = lightsensor_get_alsvalue(cm3663);
if (!(cm3663->power_state & LIGHT_ENABLED))
cm3663_light_disable(cm3663);
return sprintf(buf, "%d\n", adc);
}
static ssize_t poll_delay_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct cm3663_data *cm3663 = dev_get_drvdata(dev);
int64_t new_delay;
int err;
err = strict_strtoll(buf, 10, &new_delay);
if (err < 0)
return err;
mutex_lock(&cm3663->power_lock);
if (new_delay != ktime_to_ns(cm3663->light_poll_delay)) {
cm3663->light_poll_delay = ns_to_ktime(new_delay);
if (cm3663->power_state & LIGHT_ENABLED) {
cm3663_light_disable(cm3663);
cm3663_light_enable(cm3663);
}
}
mutex_unlock(&cm3663->power_lock);
return size;
}
static int lightsensor_get_alsvalue(struct cm3663_data *cm3663)
{
int value = 0;
u8 als_high, als_low;
#ifdef CONFIG_TARGET_LOCALE_KOR
/* Verify power state of light sensor */
if (!(cm3663->power_state & LIGHT_ENABLED)) {
pr_err("%s: Light Sensor was disabled by logic, "
"cm3663->power_state = 0x%x\n",
__func__, cm3663->power_state);
cm3663_light_enable(cm3663);
cm3663->power_state |= LIGHT_ENABLED;
}
#endif
/* get ALS */
cm3663_i2c_read(cm3663, REGS_ALS_LSB, &als_low);
cm3663_i2c_read(cm3663, REGS_ALS_MSB, &als_high);
value = ((als_high << 8) | als_low) * 5;
return value;
}