1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Device tree for LEGO MINDSTORMS EV3
4 *
5 * Copyright (C) 2017 David Lechner <david@lechnology.com>
6 */
7
8/dts-v1/;
9#include <dt-bindings/gpio/gpio.h>
10#include <dt-bindings/input/linux-event-codes.h>
11#include <dt-bindings/pwm/pwm.h>
12
13#include "da850.dtsi"
14
15/ {
16	compatible = "lego,ev3", "ti,da850";
17	model = "LEGO MINDSTORMS EV3";
18
19	aliases {
20		serial1 = &serial1;
21	};
22
23	memory@c0000000 {
24		device_type = "memory";
25		reg = <0xc0000000 0x04000000>;
26	};
27
28	/*
29	 * The buttons on the EV3 are mapped to keyboard keys.
30	 */
31	gpio_keys {
32		compatible = "gpio-keys";
33		label = "EV3 Brick Buttons";
34		pinctrl-names = "default";
35		pinctrl-0 = <&button_bias>;
36
37		center {
38			label = "Center";
39			linux,code = <KEY_ENTER>;
40			gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
41		};
42
43		left {
44			label = "Left";
45			linux,code = <KEY_LEFT>;
46			gpios = <&gpio 102 GPIO_ACTIVE_HIGH>;
47		};
48
49		back {
50			label = "Back";
51			linux,code = <KEY_BACKSPACE>;
52			gpios = <&gpio 106 GPIO_ACTIVE_HIGH>;
53		};
54
55		right {
56			label = "Right";
57			linux,code = <KEY_RIGHT>;
58			gpios = <&gpio 124 GPIO_ACTIVE_HIGH>;
59		};
60
61		down {
62			label = "Down";
63			linux,code = <KEY_DOWN>;
64			gpios = <&gpio 126 GPIO_ACTIVE_HIGH>;
65		};
66
67		up {
68			label = "Up";
69			linux,code = <KEY_UP>;
70			gpios = <&gpio 127 GPIO_ACTIVE_HIGH>;
71		};
72	};
73
74	/*
75	 * The EV3 has two built-in bi-color LEDs behind the buttons.
76	 */
77	leds {
78		compatible = "gpio-leds";
79
80		left_green {
81			label = "led0:green:brick-status";
82			/* GP6[13] */
83			gpios = <&gpio 103 GPIO_ACTIVE_HIGH>;
84			linux,default-trigger = "default-on";
85		};
86
87		right_red {
88			label = "led1:red:brick-status";
89			/* GP6[7] */
90			gpios = <&gpio 108 GPIO_ACTIVE_HIGH>;
91			linux,default-trigger = "default-on";
92		};
93
94		left_red {
95			label = "led0:red:brick-status";
96			/* GP6[12] */
97			gpios = <&gpio 109 GPIO_ACTIVE_HIGH>;
98			linux,default-trigger = "default-on";
99		};
100
101		right_green {
102			label = "led1:green:brick-status";
103			/* GP6[14] */
104			gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;
105			linux,default-trigger = "default-on";
106		};
107	};
108
109	/*
110	 * The EV3 is powered down by turning off the main 5V supply.
111	 */
112	gpio-poweroff {
113		compatible = "gpio-poweroff";
114		gpios = <&gpio 107 GPIO_ACTIVE_LOW>;
115	};
116
117	sound {
118		compatible = "pwm-beeper";
119		pinctrl-names = "default";
120		pinctrl-0 = <&ehrpwm0b_pins>;
121		pwms = <&ehrpwm0 1 1000000 0>;
122		amp-supply = <&amp>;
123	};
124
125	cvdd: regulator0 {
126		compatible = "regulator-fixed";
127		regulator-name = "cvdd";
128		regulator-min-microvolt = <1200000>;
129		regulator-max-microvolt = <1200000>;
130		regulator-always-on;
131		regulator-boot-on;
132	};
133
134	/*
135	 * This is a 5V current limiting regulator that is shared by USB,
136	 * the sensor (input) ports, the motor (output) ports and the A/DC.
137	 */
138	vcc5v: regulator1 {
139		compatible = "regulator-fixed";
140		regulator-name = "vcc5v";
141		regulator-min-microvolt = <5000000>;
142		regulator-max-microvolt = <5000000>;
143		gpio = <&gpio 101 0>;
144		over-current-gpios = <&gpio 99 GPIO_ACTIVE_LOW>;
145		enable-active-high;
146		regulator-boot-on;
147	};
148
149	/*
150	 * This is a simple voltage divider on VCC5V to provide a 2.5V
151	 * reference signal to the ADC.
152	 */
153	adc_ref: regulator2 {
154		compatible = "regulator-fixed";
155		regulator-name = "adc ref";
156		regulator-min-microvolt = <2500000>;
157		regulator-max-microvolt = <2500000>;
158		regulator-boot-on;
159		vin-supply = <&vcc5v>;
160	};
161
162	/*
163	 * This is the amplifier for the speaker.
164	 */
165	amp: regulator3 {
166		compatible = "regulator-fixed";
167		regulator-name = "amp";
168		gpio = <&gpio 111 GPIO_ACTIVE_HIGH>;
169		enable-active-high;
170	};
171
172	/*
173	 * The EV3 can use 6-AA batteries or a rechargeable Li-ion battery pack.
174	 */
175	battery {
176		compatible = "lego,ev3-battery";
177		io-channels = <&adc 4>, <&adc 3>;
178		io-channel-names = "voltage", "current";
179		rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>;
180	};
181
182	bt_slow_clk: bt-clock {
183		pinctrl-names = "default";
184		pinctrl-0 = <&ecap2_pins>, <&bt_clock_bias>;
185		compatible = "pwm-clock";
186		#clock-cells = <0>;
187		clock-frequency = <32768>;
188		pwms = <&ecap2 0 30518 0>;
189	};
190
191	/* ARM local RAM */
192	memory@ffff0000 {
193		compatible = "syscon", "simple-mfd";
194		reg = <0xffff0000 0x2000>; /* 8k */
195
196		/*
197		 * The I2C bootloader looks for this magic value to either
198		 * boot normally or boot into a firmware update mode.
199		 */
200		reboot-mode {
201			compatible = "syscon-reboot-mode";
202			offset = <0x1ffc>;
203			mode-normal = <0x00000000>;
204			mode-loader = <0x5555aaaa>;
205		};
206	};
207};
208
209&ref_clk {
210	clock-frequency = <24000000>;
211};
212
213&cpu {
214	cpu-supply = <&cvdd>;
215};
216
217/* since we have a fixed regulator, we can't run at these points */
218&opp_100 {
219	status = "disabled";
220};
221
222&opp_200 {
223	status = "disabled";
224};
225
226/*
227 * The SoC is actually the 456MHz version, but because of the fixed regulator
228 * This is the fastest we can go.
229 */
230&opp_375 {
231	status = "okay";
232};
233
234&pmx_core {
235	status = "okay";
236
237	ev3_lcd_pins: lcd-pins {
238		pinctrl-single,bits = <
239			/* SIMO, CLK */
240			0x14 0x00100100 0x00f00f00
241		>;
242	};
243};
244
245&pinconf {
246	status = "okay";
247
248	/* Buttons have external pulldown resistors */
249	button_bias: button-bias-groups {
250		disable {
251			groups = "cp5", "cp24", "cp25", "cp28";
252			bias-disable;
253		};
254	};
255
256	bt_clock_bias: bt-clock-bias-groups {
257		disable {
258			groups = "cp2";
259			bias-disable;
260		};
261	};
262
263	bt_pic_bias: bt-pic-bias-groups {
264		disable {
265			groups = "cp20";
266			bias-disable;
267		};
268	};
269};
270
271/* Input port 1 */
272&serial1 {
273	status = "okay";
274	pinctrl-names = "default";
275	pinctrl-0 = <&serial1_rxtx_pins>;
276};
277
278&serial2 {
279	pinctrl-names = "default";
280	pinctrl-0 = <&serial2_rxtx_pins>, <&serial2_rtscts_pins>, <&bt_pic_bias>;
281	status = "okay";
282
283	bluetooth {
284		compatible = "ti,cc2560";
285		clocks = <&bt_slow_clk>;
286		clock-names = "ext_clock";
287		enable-gpios = <&gpio 73 GPIO_ACTIVE_HIGH>;
288		max-speed = <2000000>;
289		nvmem-cells = <&bdaddr>;
290		nvmem-cell-names = "bd-address";
291	};
292};
293
294&rtc0 {
295	status = "okay";
296};
297
298&i2c0 {
299	status = "okay";
300	clock-frequency = <400000>;
301	pinctrl-names = "default";
302	pinctrl-0 = <&i2c0_pins>;
303
304	/*
305	 * EEPROM contains the first stage bootloader, HW ID and Bluetooth MAC.
306	 */
307	eeprom@50 {
308		compatible = "microchip,24c128", "atmel,24c128";
309		pagesize = <64>;
310		read-only;
311		reg = <0x50>;
312		#address-cells = <1>;
313		#size-cells = <1>;
314
315		bdaddr: bdaddr@3f06 {
316			reg = <0x3f06 0x06>;
317		};
318	};
319};
320
321&wdt {
322	status = "okay";
323};
324
325&mmc0 {
326	status = "okay";
327	max-frequency = <50000000>;
328	bus-width = <4>;
329	cd-gpios = <&gpio 94 GPIO_ACTIVE_LOW>;
330	pinctrl-names = "default";
331	pinctrl-0 = <&mmc0_pins>;
332};
333
334&spi0 {
335	status = "okay";
336	pinctrl-names = "default";
337	pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>, <&spi0_cs3_pin>;
338
339	flash@0 {
340		compatible = "n25q128a13", "jedec,spi-nor";
341		reg = <0>;
342		spi-max-frequency = <50000000>;
343		ti,spi-wdelay = <8>;
344
345		/* Partitions are based on the official firmware from LEGO */
346		partitions {
347			compatible = "fixed-partitions";
348			#address-cells = <1>;
349			#size-cells = <1>;
350
351			partition@0 {
352				label = "U-Boot";
353				reg = <0 0x40000>;
354			};
355
356			partition@40000 {
357				label = "U-Boot Env";
358				reg = <0x40000 0x10000>;
359			};
360
361			partition@50000 {
362				label = "Kernel";
363				reg = <0x50000 0x200000>;
364			};
365
366			partition@250000 {
367				label = "Filesystem";
368				reg = <0x250000 0xa50000>;
369			};
370
371			partition@cb0000 {
372				label = "Storage";
373				reg = <0xcb0000 0x2f0000>;
374			};
375		};
376	};
377
378	adc: adc@3 {
379		compatible = "ti,ads7957";
380		reg = <3>;
381		#io-channel-cells = <1>;
382		spi-max-frequency = <1000000>;
383		ti,spi-wdelay = <63>;
384		vref-supply = <&adc_ref>;
385	};
386};
387
388&spi1 {
389	status = "okay";
390	pinctrl-0 = <&ev3_lcd_pins>;
391	pinctrl-names = "default";
392	cs-gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
393
394	display@0 {
395		compatible = "lego,ev3-lcd";
396		reg = <0>;
397		spi-max-frequency = <10000000>;
398		a0-gpios = <&gpio 43 GPIO_ACTIVE_HIGH>;
399		reset-gpios = <&gpio 80 GPIO_ACTIVE_HIGH>;
400	};
401};
402
403&ecap2 {
404	status = "okay";
405};
406
407&ehrpwm0 {
408	status = "okay";
409};
410
411&gpio {
412	status = "okay";
413
414	/* Don't pull down battery voltage adc io channel */
415	batt_volt_en {
416		gpio-hog;
417		gpios = <6 GPIO_ACTIVE_HIGH>;
418		output-high;
419	};
420
421	/* Don't impede Bluetooth clock signal */
422	bt_clock_en {
423		gpio-hog;
424		gpios = <5 GPIO_ACTIVE_HIGH>;
425		input;
426	};
427
428	/*
429	 * There is a PIC microcontroller for interfacing with an Apple MFi
430	 * chip. This interferes with normal Bluetooth operation, so we need
431	 * to make sure it is turned off. Note: The publicly available
432	 * schematics from LEGO don't show that these pins are connected to
433	 * anything, but they are present in the source code from LEGO.
434	 */
435
436	bt_pic_en {
437		gpio-hog;
438		gpios = <51 GPIO_ACTIVE_HIGH>;
439		output-low;
440	};
441
442	bt_pic_rst {
443		gpio-hog;
444		gpios = <78 GPIO_ACTIVE_HIGH>;
445		output-high;
446	};
447
448	bt_pic_cts {
449		gpio-hog;
450		gpios = <87 GPIO_ACTIVE_HIGH>;
451		input;
452	};
453};
454
455&usb_phy {
456	status = "okay";
457};
458
459&usb0 {
460	status = "okay";
461};
462
463&usb1 {
464	status = "okay";
465	vbus-supply = <&vcc5v>;
466};
467