Hi there. I'm having lots of trouble when I want to use a capacitive touchscreen with my beaglebone black. I use this device tree overlay:
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
part-number = "BB-BONE-TOUCH";
version = "00A0";
exclusive-use =
/* the pin header uses */
"P9.17", /* i2c1_scl */
"P9.18", /* i2c1_sda */
"P9.21", /*wake up from host am33 to slave ft5x"
"P8.18", /*interrupt, def state mcasp0_ahclkx , change to input pin gpio3_21*/
/* the hardware ip uses */
"i2c1";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__
{
bb_i2c1_pins: pinmux_bb_i2c1_pins
{
pinctrl-single,pins = <
0x15c 0x72 /* i2c1_scl */
0x158 0x72 /* i2c1_sda*/
>;
} ;
edt_ft5x06_pins: pinmux_edt_ft5x06_pins
{
pinctrl-single,pins = <
0x08C 0x37 /* pin interrupt P8.18 (GPIO2_1) mode7 as gpio, enable input, enable input pullup*/
0x044 0x17 /* wake up pin control to slave from host: pullup,mode7 p9.23,gpio1_17 */
>;
};
};
};
fragment@1 {
target = <&i2c1>; /* i2c1 is numbered correctly */
__overlay__
{
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_i2c1_pins>;
clock-frequency = <400000>;
#address-cells = <1>;
#size-cells = <0>;
edt-ft5x06@38
{
status = "okay";
compatible = "edt,edt-ft5x06","edt,edt-ft5206";
pinctrl-names="default";
pinctrl-0=<&edt_ft5x06_pins>;
reg = <0x38>;
interrupt-parent = <&gpio2>;
interrupts = <1 1>;
wake-gpios = <&gpio1 17 0>; //3rd para:0 - active hig, 1-active low
reset-gpios = <&gpio1 17 1>;
touchscreen-size-x = <800>;
touchscreen-size-y = <480>;
};
};
};
};
When I load it into the capemanager I get the following error:
"edt_ft5x06 1-0038: no platform data?"
When I cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pingroups it shows me the i2c pins but not the two gpio pins I want to use as interrupt and wake pin.
When I use i2cdetect -l, the i2c1 bus is listed and when i use i2cdetect -r 1 there is no device shown in the table. But when I touch the screen while I use i2cdetect -r 1 the something crashes and it gives me this error:
omap_i2c 4802a000.i2c: controller timed out
Does anyone have an idea what is going wrong?
Im using a debian image and 3.8.13 kernel version.
Thanks
