169 lines
3.6 KiB
Plaintext
169 lines
3.6 KiB
Plaintext
/*
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* This is the Device Tree overlay for the IBB Home Automation Cape
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* for BeagleBone, BeagleBone Black and Beaglebone Green.
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*
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* Copyright (c) 2015 - Ingenieurbuero Budde (http://ing-budde.de)
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/dts-v1/;
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/plugin/;
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#include <dt-bindings/board/am335x-bbw-bbb-base.h>
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/pinctrl/am33xx.h>
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/ {
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compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green";
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/* identification */
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part-number = "cape-bone-ibb";
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version = "00A0";
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/* state the resources this cape uses */
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exclusive-use =
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/* the pin header uses */
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"P9.24", /* uart1_txd */
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"P9.26", /* uart1_rxd */
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"P9.21", /* uart2_txd */
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"P9.22", /* uart2_rxd */
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"P9.13", /* uart4_txd */
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"P9.11", /* uart4_rxd */
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"P9.15", /* rtc-int */
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/* the hardware ip uses */
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"uart1",
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"uart2",
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"uart4",
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"gpio1_16";
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fragment@0 {
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target = <&am33xx_pinmux>;
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__overlay__ {
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bb_uart1_pins: pinmux_bb_uart1_pins {
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pinctrl-single,pins = <
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BONE_P9_24 (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* uart1_txd.uart1_txd */
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BONE_P9_26 (PIN_INPUT_PULLUP | MUX_MODE0) /* uart1_rxd.uart1_rxd */
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>;
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};
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bb_uart2_pins: pinmux_bb_uart2_pins {
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pinctrl-single,pins = <
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BONE_P9_21 (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* spi0_d0.uart2_txd */
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BONE_P9_22 (PIN_INPUT_PULLUP | MUX_MODE1) /* spi0_sclk.uart2_rxd */
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>;
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};
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bb_uart4_pins: pinmux_bb_uart4_pins {
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pinctrl-single,pins = <
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BONE_P9_11 (PIN_INPUT_PULLUP | MUX_MODE6) /* gpmc_wait0.uart4_rxd_mux2 */
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BONE_P9_13 (PIN_OUTPUT_PULLDOWN | MUX_MODE6) /* gpmc_wpn.uart4_txd_mux2 */
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>;
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};
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bb_gpio1_16_pins: pinmux_bb_gpio1_16_pins {
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pinctrl-single,pins = <
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BONE_P9_15 (PIN_INPUT | MUX_MODE7) /* gpmc_a0.gpio1_16 */
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>;
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};
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};
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};
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fragment@1 {
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target = <&uart1>;
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__overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&bb_uart1_pins>;
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};
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};
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fragment@2 {
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target = <&uart2>;
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__overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&bb_uart2_pins>;
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};
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};
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fragment@3 {
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target = <&uart4>;
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__overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&bb_uart4_pins>;
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};
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};
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fragment@4 {
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target = <&i2c2>;
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__overlay__ {
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/* overwrite clock freq */
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clock-frequency = <400000>;
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/* shut up DTC warnings */
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#address-cells = <1>;
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#size-cells = <0>;
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/* RTC */
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rtc@68 {
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compatible = "maxim,ds3231";
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reg = <0x68>;
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};
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/* PCA9546 I2C multiplexer */
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i2cmux@70 {
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compatible = "nxp,pca9546";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x70>;
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im0: bus@0 {
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compatible = "nxp,pca954x-bus";
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reg = <0>;
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};
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im1: bus@1 {
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compatible = "nxp,pca954x-bus";
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reg = <1>;
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};
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im2: bus@2 {
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compatible = "nxp,pca954x-bus";
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reg = <2>;
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};
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im3: bus@3 {
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compatible = "nxp,pca954x-bus";
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reg = <3>;
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};
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};
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};
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};
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fragment@5 {
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target-path="/";
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__overlay__ {
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gpio_keys {
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compatible = "gpio-keys";
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pinctrl-names = "default";
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pinctrl-0 = <&bb_gpio1_16_pins>;
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/* avoid stupid warning */
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#address-cells = <1>;
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#size-cells = <0>;
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rtc_mfp@1 {
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label = "rtc_mfp";
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gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
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linux,code = <143>; /* System Wake Up */
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gpio-key,wakeup;
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};
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};
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aliases {
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i2c3 = &im0;
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i2c4 = &im1;
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i2c5 = &im2;
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i2c6 = &im3;
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};
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};
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};
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};
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