I have the following overlay that I am trying to get working on 4.1.x
I have tested with the UART4 & UART2 overlays provided and they work fine but I want to combine it into a single overlay and also add in GPIO3_19 which delivers a PPS signal.
I compile the overlay fine with no errors and copy it across to /lib/firmware/PFRADAR.dtbo
However when I then go to run I get the following…
root@beaglebone:~# echo ‘BBB-PF’ > /sys/devices/platform/bone_capemgr/slots
-su: echo: write error: No such file or directory
Overlay as follows…
/dts-v1/;
/plugin/;
/ {
compatible = “ti,beaglebone-black”;
/* identification */
part-number = “BBB-PF”;
version = “00A0”;
/* state the resources this cape uses /
exclusive-use =
/ the pin header uses /
“P9.11”, / uart4_rxd /
“P9.13”, / uart4_txd /
“P9.22”, / uart2_rxd /
“P9.21”, / uart2_txd /
“P9.27”, / GPIO3_19 /
/ the hardware ip uses /
“uart2”, / 0-based counting /
“uart4”, / 0-based counting /
“gpio3_19”; / 0-based counting */
fragment@0 {
target = <&am33xx_pinmux>;
overlay {
receiver_uart2_pins: pinmux_receiver_uart2_pins {
pinctrl-single,pins = <
0x150 0x26 /* P9.22 uart2_rxd MODE6 INPUT (RX) /
0x154 0x06 / P9.21 uart2_txd MODE6 OUTPUT (TX) */
;
};
gps_uart4_pins: pinmux_gps_uart4_pins {
pinctrl-single,pins = <
0x70 0x26 /* P9.11 uart4_rxd MODE6 INPUT (RX) /
0x74 0x06 / P9.13 uart4_txd MODE6 OUTPUT (TX) */
;
};
gps_pps_pins: pinmux_gps_pps_pins {
pinctrl-single,pins = <
0x1A4 0xf /* P9.27 gpio3_19 */
;
};
};
};
fragment@1 {
target = <&uart3>; /* 1-based counting */
overlay {
status = “okay”;
pinctrl-names = “default”;
pinctrl-0 = <&gps_uart2_pins>;
};
};
fragment@2 {
target = <&uart5>; /* 1-based counting */
overlay {
status = “okay”;
pinctrl-names = “default”;
pinctrl-0 = <&gps_uart4_pins>;
};
};
fragment@3 {
target = <&ocp>;
overlay {
pps {
compatible = “pps-gpio”;
status = “okay”;
pinctrl-names = “default”;
pinctrl-0 = <&gps_pps_pins>;
gpios = <&gpio4 19 0 >; /* 1-based counting */
assert-rising-edge;
};
};
};
};