I used a custom board. I ended up with changing the device tree. This can
be found in the kernel source: am335x-bone-common.dtsi
The io's became usable by changing the default muxmode to 7 (GPIO).
&am33xx_pinmux {
pinctrl-names = "default";
pinctrl-0 = <&gpio_pins>;
gpio_pins: gpio_pins {
pinctrl-single,pins = <
0x0E4 (PIN_INPUT_PULLUP | MUX_MODE7) /* LCD_HSYNC
to GPIO2_23 for TP21 */
0x0E8 (PIN_INPUT_PULLUP | MUX_MODE7) /* LCD_PCLK
to GPIO2_24 for TP19 */
>;
};
Then compile the device tree and put it on the image.
Op vrijdag 29 mei 2015 23:27:27 UTC+2 schreef Hunter:
>
> Did you ever get this to work? I'm also finding that P9.17/18 do aren't
> controllable (although I think they are GPIO0_4/5 and thus PIN 4/5).
>
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