static void Po188_resume(struct early_suspend *h)
{
int ret = 0;
if( po188_driver.status_on )
{
ret = regulator_enable(gPo188Regulator);
if (ret < 0) {
PO188_ERRMSG("enable po188 vcc drive error");
return;
}
ret = k3_adc_open_channel(PO188_ADC_CHANNEL);
if (ret < 0)
{
PO188_ERRMSG("k3_adc_open_channel error\n");
regulator_disable(gPo188Regulator);
return;
}
mod_timer(&po188_driver.timer, jiffies + msecs_to_jiffies(po188_driver.delay_time));
}
}
/* getting the major version by channel number */
static int hw_major_version_get(int channel_no)
{
unsigned char reserve = 0;
int value = 0;
int ret = 0;
/* open adc channel */
ret = k3_adc_open_channel(channel_no);
if (ret < 0)
{
printk(KERN_ERR "%s:open adc channel failed(ret=%d channel_no=%d)\n", __func__, ret, channel_no);
return ret;
}
/* get the volatge value by adc channel */
value = k3_adc_get_value(channel_no, &reserve);
/* close the adc channel */
ret = k3_adc_close_channal(channel_no);
if (ret < 0)
{
printk(KERN_ERR "%s:close adc channel failed(ret=%d channel_no=%d)\n", __func__, ret, channel_no);
return ret;
}
return value;
}
static long po188_ioctl(struct file* file, unsigned int cmd, unsigned long param)
{
int ret = 0;
int flags = 0;
void __user *argp = (void __user *)param;
int iDelayTime = 0;
switch (cmd)
{
case LIGHTSENSOR_IOCTL_ENABLE:
if (copy_from_user(&flags, argp, sizeof(flags)))
{
ret = -EFAULT;
}
else
{
if ( 0==flags )
{
PO188_DMSG("active disable pol88\n");
spin_lock(&po188_driver.s_lock);
po188_driver.status_on = false;
spin_unlock(&po188_driver.s_lock);
cancel_work_sync(&po188_cb_work);
flush_workqueue(po188_driver.po188_wq);
del_timer(&po188_driver.timer);
ret = k3_adc_close_channal(PO188_ADC_CHANNEL);
if (ret < 0)
{
PO188_ERRMSG("k3_adc_close_channal error\n");
}
ret = regulator_disable(gPo188Regulator);
if (ret < 0) {
PO188_ERRMSG("disable po188 vcc drive error");
}
}
else if (1 == flags)
{
PO188_DMSG("active enable pol88\n");
ret = regulator_enable(gPo188Regulator);
if (ret < 0) {
PO188_ERRMSG("enable po188 vcc drive error");
return ret;//regulator_enable error, return.
}
ret = k3_adc_open_channel(PO188_ADC_CHANNEL);
if (ret < 0)
{
PO188_ERRMSG("k3_adc_open_channel error\n");
regulator_disable(gPo188Regulator);
return ret;
}
mod_timer(&po188_driver.timer, jiffies + msecs_to_jiffies(po188_driver.delay_time));
spin_lock(&po188_driver.s_lock);
po188_driver.status_on = true;
spin_unlock(&po188_driver.s_lock);
}
}
break;
case LIGHTSENSOR_IOCTL_GET_ENABLED:
spin_lock(&po188_driver.s_lock);
flags = po188_driver.status_on;
spin_unlock(&po188_driver.s_lock);
if (copy_to_user(argp, &flags, sizeof(flags)))
{
ret = -EFAULT;
}
break;
case LIGHTSENSOR_IOCTL_GET_DELAY:
spin_lock(&po188_driver.s_lock);
iDelayTime = po188_driver.delay_time;
spin_unlock(&po188_driver.s_lock);
if (copy_to_user(argp, &iDelayTime, sizeof(iDelayTime)))
{
ret = -EFAULT;
}
break;
case LIGHTSENSOR_IOCTL_SET_DELAY:
if (copy_from_user(&iDelayTime, argp, sizeof(iDelayTime)))
{
ret = -EFAULT;
}
else
{
spin_lock(&po188_driver.s_lock);
po188_driver.delay_time = iDelayTime;
spin_unlock(&po188_driver.s_lock);
}
break;
default:
PO188_ERRMSG("CMD INVALID.\n");
ret = -EINVAL;
break;
}
return ret;
}