Trying to get an ST1633 touch screen working with a PB derived board.
I had to jump to Linux 5.1-rc3 (cross building with bb-kernel) to get the
sitronix driver patched with st1633 support.
I have CONFIG_TOUCHSCREEN_ST1232 enabled in .config.
I have I2C2 working on the board - I can use
i2cdetect -y -r 2
to find i2c devices that I breadboard onto I2C2 for testing
I can not seem to detect the ST1633 when connected to the PB board,
But I can detect it if I bread board it to another Linux box.
I am guessing at the moment that the st1633 reset line may be in the wrong
state.
I am trying to make sure I have the TS.RES set correctly.
I have verified that I have the right pin by setting it to a gpio_led in
the device tree overlay, breadboarding an LED to it and I can toggle the
LED from /sys/
Currently I have the devicetree pinctl as
pinctrl_st1633: pinmux_pinctrl_st1633 {
pinctrl-single,pins = <
/* (B13) mcasp0_fsx GPIO111 GPIO3_15
LCD.TS.INT */
AM33XX_IOPAD(0x0994, PIN_INPUT_PULLDOWN | MUX_MODE7)
/* (A13) mcasp0_aclkx GPIO110 GPIO3_14 LCD.TS.RES */
AM33XX_IOPAD(0x0990, PIN_OUTPUT_PULLUP | MUX_MODE7)
>;
I have the st1633 setup as
fragment@6 {
target = <&i2c2>;
__overlay__ {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&pb_i2c2_pins>;
/* this is the configuration part */
clock-frequency = <100000>;
#address-cells = <1>;
#size-cells = <0>;
sitronix_ts@55 {
status = "okay";
compatible = "sitronix,st1633";
reg = <0x55>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_st1633>;
interrupt-parent = <&gpio3>;
interrupts = <15 0>;
reset-gpios = <&gpio3 14 GPIO_ACTIVE_LOW>;
touchscreen-size-x = <272>;
touchscreen-size-y = <480>;
touchscreen-swapped-x-y;
};
};
};
But when linux boots I am not seeing anything in the logs that suggested in
even tried to load the sitronix driver.
Any ideas ?
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