I am enabling the serial ports using /lib/firmware/BB-UART#-ooAo.dts and
UART1 is having issues. When I look at the .dts file, it looks wrong (both
tx & rx are set as inputs).
(check out the pin definitions in fragment@0)
/*
* Copyright (C) 2013 CircuitCo
*
* Virtual cape for UART1 on connector pins P9.24 P9.26
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
/* identification */
part-number = "BB-UART1";
version = "00A0";
/* state the resources this cape uses */
exclusive-use =
/* the pin header uses */
"P9.24", /* uart1_txd */
"P9.26", /* uart1_rxd */
/* the hardware ip uses */
"uart1";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
bb_uart1_pins: pinmux_bb_uart1_pins {
pinctrl-single,pins = <
0x184 0x20 /* P9.24
uart1_txd.uart1_txd OUTPUT */
0x180 0x20 /* P9.26
uart1_rxd.uart1_rxd INPUT */
>;
};
};
};
fragment@1 {
target = <&uart2>; /* really uart1 */
__overlay__ {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_uart1_pins>;
};
};
};
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