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1 | #include "am335x-boneblack.dts" | |
2 | - | #include "am335x-uio-pruss.dtsi" // https://github.com/mvduin/overlay-utils/blob/master/uio-pruss.dtsi |
2 | + | #include <dt-bindings/pinctrl/am33xx.h> |
3 | #include <dt-bindings/board/am335x-bbw-bbb-base.h> | |
4 | ||
5 | &{/chosen} { | |
6 | base_dtb = "am335x-boneblack-custom-example.dts"; // <-- name of this file goes here | |
7 | }; | |
8 | ||
9 | // if you want to use UIO-PRUSS: | |
10 | #include "am335x-uio-pruss.dtsi" // download from https://pastebin.com/yuFnTWWL | |
11 | ||
12 | ||
13 | // if you want to disable HDMI: | |
14 | &lcdc { status = "disabled"; }; | |
15 | &tda19988 { status = "disabled"; }; | |
16 | ||
17 | // if you want to disable HDMI or just disable HDMI audio: | |
18 | / { /delete-node/ sound; }; | |
19 | &mcasp0 { status = "disabled"; }; | |
20 | ||
21 | ||
22 | // example to enable UART4: | |
23 | &uart4 { | |
24 | status = "okay"; | |
25 | ||
26 | pinctrl-names = "default"; | |
27 | pinctrl-0 = <&uart4_pins>; | |
28 | }; | |
29 | &am33xx_pinmux { | |
30 | // Note that a label ("uart4_pins") cannot contain punctuation other than underscores and must be globally unique. | |
31 | // On the other hand, for a node name ("uart4") it is conventional to use dashes as separators, not underscores, and | |
32 | // it only needs to be unique within the parent node, which in this case is the pinmux controller, so putting "pins" | |
33 | // or "pinmux" in the node name would be very redundant. | |
34 | // | |
35 | // My suggested naming scheme for pinmux nodes is: | |
36 | // some_thing_pins: some-thing { ... }; | |
37 | // | |
38 | uart4_pins: uart4 { | |
39 | pinctrl-single,pins = < | |
40 | BONE_P9_13 ( PIN_OUTPUT_PULLUP | MUX_MODE6 ) // txd | |
41 | BONE_P9_11 ( PIN_INPUT_PULLUP | MUX_MODE6 ) // rxd | |
42 | // uncomment if you're using these: | |
43 | // BONE_P8_33 ( PIN_OUTPUT_PULLUP | MUX_MODE6 ) // rts | |
44 | // BONE_P8_35 ( PIN_INPUT_PULLUP | MUX_MODE6 ) // cts | |
45 | >; | |
46 | }; | |
47 | }; |