Interfacing Touchscreen (edt-ft5406) with stm32mp157c in Linux-Kernel

[ahamod3.1416]

Hi everyone,

We have developed a custom board based on stm32mp157 mpu. We have used openstlinux distribution and the branch is "kirkstone". We have interfaced edt_ft5x06 display. Display is working perfectly fine but problem arises when we try to interact with the touch. It is completely unresponsive. With "evtest" in Linux kernel I do not see any touch event. Devicetree entry for my touch-screen is following:

        touchscreen@38 {
                compatible ="edt,edt-ft5406";
                reg = <0x38>;
                interrupts = <2 2>;
                interrupt-parent = <&gpiof>;
                interrupt-controller;
                touchscreen-size-x = <480>;
                touchscreen-size-y = <800>;
                vcc-supply = <&v3v3>;
                iovcc-supply = <&v3v3>;
                status = "okay";
        };

If I look thorough the dmesg, then I get following entry:

[    2.081938] input: EP0700M12 as /devices/platform/soc/40012000.i2c/i2c-0/0-0038/input/input0

Also I have following entry for the interrupt:

 cat /proc/interrupts
           CPU0       CPU1       
 26:      22514      70457     GIC-0  27 Level     arch_timer
 30:          0          0     GIC-0  67 Level     44004000.spi
 31:          0          0     GIC-0  43 Level     dma1chan0
 32:          0          0     GIC-0  44 Level     dma1chan1
 33:          0          0     GIC-0  45 Level     dma1chan2
 34:        382          0     GIC-0  46 Level     dma1chan3
 35:          0          0     GIC-0  47 Level     dma1chan4
 36:          0          0     GIC-0  48 Level     dma1chan5
 37:          0          0     GIC-0  49 Level     dma1chan6
 38:          0          0     GIC-0  79 Level     dma1chan7
 41:          2          0     GIC-0 154 Level     58000000.dma-controller
 42:          0          0     GIC-0 124 Level     58003000.spi
 43:      68928          0     GIC-0  81 Level     mmci-pl18x (cmd)
 44:       1181          0     GIC-0 156 Level     mmci-pl18x (cmd)
 45:      11211          0     GIC-0  93 Level     eth0
 46:          1          0     GIC-0 106 Level     ohci_hcd:usb2
 47:        455          0     GIC-0 120 Level     5a001000.display-controller
 48:          0          0     GIC-0 121 Level     5a001000.display-controller
 53:         37          0  stm32-exti-h-direct  32 Level     40018000.serial
 54:          0          0  stm32-exti-h-direct  70 Level     eth0
 55:         26          0  stm32-exti-h-direct  43 Level     ehci_hcd:usb1
 56:          0          0  stm32-exti-h-direct  19 Level     5c004000.rtc
 57:         58          0  stm32-exti-h-direct  21 Level     40012000.i2c
 58:          0          0     GIC-0  64 Level     40012000.i2c
 59:          0          0  stm32gpio   2 Edge      edt-ft5406
 60:          0          0  stm32-exti-h-direct  25 Level     40015000.i2c
 61:          0          0     GIC-0 140 Level     40015000.i2c
IPI0:          0          0  CPU wakeup interrupts
IPI1:          0          0  Timer broadcast interrupts
IPI2:         36         72  Rescheduling interrupts
IPI3:       4883      77663  Function call interrupts
IPI4:          0          0  CPU stop interrupts
IPI5:          0          0  IRQ work interrupts
IPI6:          0          0  completion interrupts
Err:          0

I tried possible solutions, but could not get it to work. Can anyone tell me what is the reason for this behavior? Thanks a lot.