Question
How to add TSC2046 in STM32MP151AAC?
Dear All,
We have been using LCD module which supports touch screen.
Currently image can be displayed properly.
I just started debugging touch screen.
we use SPI2 to interface to touch screen ic, TSC2046.
This is setting spi2 in dts.
&spi2 {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&spi2_pins_a>;
pinctrl-1 = <&spi2_sleep_pins_a>;
cs-gpios = <&gpioi 0 0>;
status = "okay";
//spidev@0 {
// compatible = "spidev";
// spi-max-frequency = <20000000>;
// reg = <0>;
//};
ads7846@0 {
compatible = "ti,ads7846";
reg = <0x0>;
spi-max-frequency = <1000000>;
interrupt-parent = <&gpioe>;
interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
//gpios = <&gpioe 12 0>;
pendown-gpio = <&gpioe 12 0>; /*GPIOE 12*/
//ti,x-min = /bits/ 16 <0>;
//ti,x-max = /bits/ 16 <2400>;
//ti,y-min = /bits/ 16 <0>;
//ti,y-max = /bits/ 16 <3200>;
//ti,x-plate-ohms = /bits/ 16 <40>;
//ti,pressure-max = /bits/ 16 <255>;
touchscreen-size-x = <240>;
touchscreen-size-y = <320>;
wakeup-source;
status = "okay";
};
};
1. configure ADS7846 as 'M' by menuconfig
2. build kernel
3. update dtb and uimage
4. cp ads7846.ko to /lib/
I'm considering getting event through reading "/dev/input/event"
Could you advise how to make touch screen work?
Best wishes,
KIM