/********************************************************************
Function Name :- pwm_pin_high_or_low
Arguments :- None
Return Value :- None/Always Success.
Functionality :- to Simulate ESD using Module Parameter.
dependencies :- Should be called when lcd panel is on.
Others :- pwm_pin --> 1 ( PWM_PIN low & esd isr active )
pwm_pin --> 2 ( Dsi reset )
*********************************************************************/
int pwm_pin_high_or_low(const char *val, struct kernel_param *kp)
{
unsigned long pwm_pin;
int rc = 0;
if (val == NULL)
{
printk("%s Null Buf \n",__func__);
return -1;
}
printk("%s enter \n",__func__);
pwm_pin = simple_strtoul(val,NULL,10);
if ( 1 == pwm_pin)
{
rc = drive_pwm_pin_to_low(); //ESD Occur
if ( rc )
{
printk("Error while making pwm pin Low \n");
}
}
else if ( 2 == pwm_pin )
{
esd_dsi_reset();
printk("Dsi Reset Done \n");
}
else
{
rc = drive_pwm_pin_to_high(); //Normal
if ( rc )
{
printk("Error while making pwm pin High \n");
}
}
return 0;
}
/********************************************************************
Function Name :- esd_detect_wq_handler
Arguments :- Work queue
Return Value :- None
Functionality :- to disable ESD Irq & issue a dma reset.
dependencies :- Panel should be already intialized.
Others :- This will be called after 200ms of interrupt occurrence.
*********************************************************************/
static void esd_detect_wq_handler(struct work_struct *w)
{
if( 1 == atomic_read(&lcd_esd->esd_irq_state))
{
disable_irq(lcd_esd->esd_irq);
printk("ESD irq Disabled \n");
atomic_set(&lcd_esd->esd_irq_state,0);
}
printk("%s Enter \n",__func__);
esd_dsi_reset();
}
/********************************************************************
Function Name :- esd_detect_wq_handler
Arguments :- Work queue
Return Value :- None
Functionality :- to disable ESD Irq & issue a dma reset.
dependencies :- Panel should be already intialized.
Others :- This will be called after 200ms of interrupt occurrence.
*********************************************************************/
static void esd_detect_wq_handler(struct work_struct *w)
{
if(gpio_get_value_cansleep(lcd_esd->esd_detect_gpio) == GPIO_U0_LCD_ESD_DETECT_PIN_IS_LOW)
{
if( 1 == atomic_read(&lcd_esd->esd_irq_state))
{
disable_irq(lcd_esd->esd_irq);
printk("ESD irq Disabled \n");
atomic_set(&lcd_esd->esd_irq_state,0);
}
printk("%s Enter \n",__func__);
esd_dsi_reset();
}
else /*GPIO_U0_LCD_ESD_DETECT_PIN_IS_HIGH ??*/
{
printk("%s LCD_PWM pin is high - do nothing \n",__func__);
}
}
