I got an overlay working:
beaglebone:~/boneDeviceTree-master/overlay$ cat hd44780.dts
/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Purpose License Version 2 as
* published by the Free Software Foundation
*
* Original from:
github.com/jadonk/validation-scripts/blob/master/test-capemgr/
*
* Modified by Derek Molloy for the example on www.derekmolloy.ie
* that maps GPIO pins for the example
*/
/dts-v1/;
/plugin/;
/{
compatible = "ti,beaglebone", "ti,beaglebone-black";
part-number = "hd44780";
version = "00A0";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
pinctrl_hd44780: hd44780_pins {
pinctrl-single,pins = <
0x038 0x17
0x03c 0x17
0x028 0x17
0x024 0x17
0x030 0x17
0x034 0x17
>;
};
};
};
fragment@1 {
target = <&ocp>;
__overlay__ {
test_helper: helper {
compatible = "bone-pinmux-helper";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hd44780>;
status = "okay";
};
};
};
};
Hasn't solved my problem with the LCD code, however.
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