1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Devicetree for the Samsung XCover 2 GT-S7710 also known as Skomer.
4 */
5
6 /dts-v1/;
7 #include "ste-db8500.dtsi"
8 #include "ste-ab8505.dtsi"
9 #include "ste-dbx5x0-pinctrl.dtsi"
10 #include <dt-bindings/gpio/gpio.h>
11 #include <dt-bindings/leds/common.h>
12 #include <dt-bindings/input/input.h>
13 #include <dt-bindings/interrupt-controller/irq.h>
14
15 / {
16 model = "Samsung XCover 2 (GT-S7710)";
17 compatible = "samsung,skomer", "st-ericsson,u8500";
18
19 chosen {
20 stdout-path = &serial2;
21 };
22
23 battery: battery {
24 compatible = "samsung,eb485159lu";
25 };
26
27 thermal-zones {
28 battery-thermal {
29 /* This zone will be polled by the battery temperature code */
30 polling-delay = <0>;
31 polling-delay-passive = <0>;
32 thermal-sensors = <&bat_therm>;
33
34 trips {
35 battery-crit-hi {
36 temperature = <70000>;
37 hysteresis = <2000>;
38 type = "critical";
39 };
40 };
41 };
42 };
43
44 bat_therm: thermistor {
45 compatible = "samsung,1404-001221";
46 io-channels = <&gpadc 0x02>; /* BatTemp */
47 pullup-uv = <1800000>;
48 pullup-ohm = <230000>;
49 pulldown-ohm = <0>;
50 #thermal-sensor-cells = <0>;
51 };
52
53 /* TI TXS0206 level translator for 2.9 V */
54 sd_level_translator: regulator-gpio {
55 compatible = "regulator-fixed";
56
57 /* GPIO87 EN */
58 gpios = <&gpio2 23 GPIO_ACTIVE_HIGH>;
59 enable-active-high;
60
61 regulator-name = "sd-level-translator";
62 regulator-min-microvolt = <2900000>;
63 regulator-max-microvolt = <2900000>;
64 regulator-type = "voltage";
65
66 startup-delay-us = <200>;
67
68 pinctrl-names = "default";
69 pinctrl-0 = <&sd_level_translator_default>;
70 };
71
72 /* External LDO MIC5366-3.3YMT for eMMC */
73 ldo_3v3_reg: regulator-gpio-ldo-3v3 {
74 compatible = "regulator-fixed";
75 regulator-name = "en-3v3-fixed-supply";
76 regulator-min-microvolt = <3300000>;
77 regulator-max-microvolt = <3300000>;
78 gpio = <&gpio6 31 GPIO_ACTIVE_HIGH>;
79 startup-delay-us = <5000>;
80 enable-active-high;
81 pinctrl-names = "default";
82 pinctrl-0 = <&emmc_ldo_en_default_mode>;
83 };
84
85 wlan_en: regulator-gpio-wlan-en {
86 compatible = "regulator-fixed";
87 regulator-name = "wl-reg-on";
88 regulator-min-microvolt = <3000000>;
89 regulator-max-microvolt = <3000000>;
90 startup-delay-us = <200000>;
91 /* GPIO215 WLAN_EN */
92 gpio = <&gpio6 23 GPIO_ACTIVE_HIGH>;
93 enable-active-high;
94 pinctrl-names = "default";
95 pinctrl-0 = <&wlan_en_default_mode>;
96 };
97
98 vibrator {
99 compatible = "gpio-vibrator";
100 enable-gpios = <&gpio6 3 GPIO_ACTIVE_HIGH>;
101 pinctrl-names = "default";
102 pinctrl-0 = <&vibrator_default>;
103 };
104
105 gpio-keys {
106 compatible = "gpio-keys";
107 pinctrl-names = "default";
108 pinctrl-0 = <&gpio_keys_default_mode>;
109
110 button-home {
111 linux,code = <KEY_HOME>;
112 label = "HOME";
113 /* GPIO91 */
114 gpios = <&gpio2 27 GPIO_ACTIVE_LOW>;
115 };
116 button-volup {
117 linux,code = <KEY_VOLUMEUP>;
118 label = "VOL+";
119 /* GPIO67 */
120 gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
121 };
122 button-voldown {
123 linux,code = <KEY_VOLUMEDOWN>;
124 label = "VOL-";
125 /* GPIO92 */
126 gpios = <&gpio2 28 GPIO_ACTIVE_LOW>;
127 };
128 button-menu {
129 linux,code = <KEY_MENU>;
130 label = "MENU";
131 /* GPIO204 */
132 gpios = <&gpio6 12 GPIO_ACTIVE_LOW>;
133 };
134 button-back {
135 linux,code = <KEY_BACK>;
136 label = "BACK";
137 /* GPIO205 */
138 gpios = <&gpio6 13 GPIO_ACTIVE_LOW>;
139 };
140 };
141
142 ktd253: backlight {
143 compatible = "kinetic,ktd253";
144 /* GPIO 69 */
145 enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
146 /* Default to 13/32 brightness */
147 default-brightness = <13>;
148 pinctrl-names = "default";
149 pinctrl-0 = <&gpio_backlight_default_mode>;
150 };
151
152 /* Richtek RT8515GQW Flash LED Driver IC */
153 flash {
154 compatible = "richtek,rt8515";
155 /* GPIO 140 */
156 enf-gpios = <&gpio4 12 GPIO_ACTIVE_HIGH>;
157 /* GPIO 141 */
158 ent-gpios = <&gpio4 13 GPIO_ACTIVE_HIGH>;
159 /*
160 * RFS is 16 kOhm and RTS is 100 kOhm giving
161 * the flash max current 343mA and torch max
162 * current 55 mA.
163 */
164 richtek,rfs-ohms = <16000>;
165 richtek,rts-ohms = <100000>;
166 pinctrl-names = "default";
167 pinctrl-0 = <&gpio_flash_default_mode>;
168
169 led {
170 function = LED_FUNCTION_FLASH;
171 color = <LED_COLOR_ID_WHITE>;
172 flash-max-timeout-us = <250000>;
173 flash-max-microamp = <343750>;
174 led-max-microamp = <55000>;
175 };
176 };
177
178 i2c-gpio-0 {
179 compatible = "i2c-gpio";
180 sda-gpios = <&gpio4 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
181 scl-gpios = <&gpio4 15 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
182 pinctrl-names = "default";
183 pinctrl-0 = <&i2c_gpio_0_default>;
184 #address-cells = <1>;
185 #size-cells = <0>;
186 /* TODO: this should be used by the NCP6914 Camera power management unit */
187 };
188
189 i2c-gpio-1 {
190 compatible = "i2c-gpio";
191 sda-gpios = <&gpio4 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
192 scl-gpios = <&gpio4 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
193 pinctrl-names = "default";
194 pinctrl-0 = <&i2c_gpio_1_default>;
195 #address-cells = <1>;
196 #size-cells = <0>;
197 magnetometer@c {
198 compatible = "alps,hscdtd008a";
199 reg = <0x0c>;
200 avdd-supply = <&ab8500_ldo_aux1_reg>;
201 dvdd-supply = <&ab8500_ldo_aux8_reg>;
202 };
203 };
204
205 soc {
206 // External Micro SD slot
207 mmc@80126000 {
208 arm,primecell-periphid = <0x10480180>;
209 max-frequency = <100000000>;
210 bus-width = <4>;
211 cap-sd-highspeed;
212 cap-mmc-highspeed;
213 /* All direction control is used */
214 st,sig-pin-fbclk;
215 full-pwr-cycle;
216 vmmc-supply = <&ab8500_ldo_aux3_reg>;
217 vqmmc-supply = <&sd_level_translator>;
218 pinctrl-names = "default", "sleep";
219 pinctrl-0 = <&mc0_a_1_default>;
220 pinctrl-1 = <&mc0_a_1_sleep>;
221 status = "okay";
222 };
223
224 // WLAN SDIO channel
225 mmc@80118000 {
226 arm,primecell-periphid = <0x10480180>;
227 max-frequency = <50000000>;
228 bus-width = <4>;
229 non-removable;
230 cap-sd-highspeed;
231 vmmc-supply = <&wlan_en>;
232 pinctrl-names = "default", "sleep";
233 pinctrl-0 = <&mc1_a_2_default>;
234 pinctrl-1 = <&mc1_a_2_sleep>;
235 status = "okay";
236 #address-cells = <1>;
237 #size-cells = <0>;
238
239 wifi@1 {
240 compatible = "brcm,bcm4334-fmac", "brcm,bcm4329-fmac";
241 reg = <1>;
242 /* GPIO216 WL_HOST_WAKE */
243 interrupt-parent = <&gpio6>;
244 interrupts = <24 IRQ_TYPE_EDGE_FALLING>;
245 interrupt-names = "host-wake";
246 pinctrl-names = "default";
247 pinctrl-0 = <&wlan_default_mode>;
248 };
249 };
250
251 /*
252 * eMMC seems to be mostly Samsung KLM4G1YE4C "4YMD1R"
253 */
254 mmc@80005000 {
255 arm,primecell-periphid = <0x10480180>;
256 max-frequency = <100000000>;
257 bus-width = <8>;
258 non-removable;
259 cap-mmc-highspeed;
260 mmc-ddr-1_8v;
261 no-sdio;
262 no-sd;
263 /* From datasheet page 26 figure 9: 300 ms set-up time for 4GB */
264 post-power-on-delay-ms = <300>;
265 vmmc-supply = <&ldo_3v3_reg>;
266 pinctrl-names = "default", "sleep";
267 pinctrl-0 = <&mc2_a_1_default>;
268 pinctrl-1 = <&mc2_a_1_sleep>;
269
270 status = "okay";
271 };
272
273 /* GBF (Bluetooth) UART */
274 serial@80120000 {
275 pinctrl-names = "default", "sleep";
276 pinctrl-0 = <&u0_a_1_default>;
277 pinctrl-1 = <&u0_a_1_sleep>;
278 status = "okay";
279
280 /* FIXME: not quite working yet, probably needs regulators */
281 bluetooth {
282 /* BCM4334B0 actually */
283 compatible = "brcm,bcm4330-bt";
284 shutdown-gpios = <&gpio6 30 GPIO_ACTIVE_HIGH>;
285 device-wakeup-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
286 host-wakeup-gpios = <&gpio3 1 GPIO_ACTIVE_HIGH>;
287 pinctrl-names = "default";
288 pinctrl-0 = <&bluetooth_default_mode>;
289 };
290 };
291
292 /* GPS UART */
293 serial@80121000 {
294 status = "okay";
295 pinctrl-names = "default", "sleep";
296 pinctrl-0 = <&u1rxtx_a_1_default &u1ctsrts_a_1_default>;
297 pinctrl-1 = <&u1rxtx_a_1_sleep &u1ctsrts_a_1_sleep>;
298
299 gnss {
300 /* The CSRG05TA03-ICJE-R is a SirfStarV 5t chip */
301 compatible = "csr,csrg05ta03-icje-r";
302 /* GPS_RSTN on GPIO209 */
303 reset-gpios = <&gpio6 17 GPIO_ACTIVE_LOW>;
304 /* GPS_ON_OFF on GPIO86 */
305 sirf,onoff-gpios = <&gpio2 22 GPIO_ACTIVE_HIGH>;
306 /* GPS_1V8 (VSMPS2) */
307 vcc-supply = <&db8500_vsmps2_reg>;
308 pinctrl-names = "default";
309 pinctrl-0 = <&g05ta03_skomer_default>;
310 /* According to /etc/sirfgps.conf */
311 current-speed = <460800>;
312 };
313 };
314
315 /* Debugging console UART connected to AB8505 USB */
316 serial@80007000 {
317 status = "okay";
318 pinctrl-names = "default", "sleep";
319 pinctrl-0 = <&u2rxtx_c_1_default>;
320 pinctrl-1 = <&u2rxtx_c_1_sleep>;
321 };
322
323 prcmu@80157000 {
324 ab8505 {
325 phy {
326 pinctrl-names = "default", "sleep";
327 pinctrl-0 = <&usb_a_1_default>;
328 pinctrl-1 = <&usb_a_1_sleep>;
329 };
330
331 ab8500_fg {
332 line-impedance-micro-ohms = <16000>;
333 };
334
335 regulator {
336 ab8500_ldo_aux1 {
337 /* Used for VDD for sensors */
338 regulator-name = "AUX1";
339 regulator-min-microvolt = <3000000>;
340 regulator-max-microvolt = <3300000>;
341 };
342
343 ab8500_ldo_aux2 {
344 /* Supplies the Cypress TMA140 touchscreen only with 3.0V */
345 regulator-name = "AUX2";
346 regulator-min-microvolt = <3000000>;
347 regulator-max-microvolt = <3000000>;
348 };
349
350 ab8500_ldo_aux3 {
351 /* Used for voltage for external MMC/SD card */
352 regulator-name = "AUX3";
353 regulator-min-microvolt = <1100000>;
354 regulator-max-microvolt = <3300000>;
355 };
356
357 ab8500_ldo_aux4 {
358 regulator-name = "AUX4";
359 /* Hammer to 3.0V for the display */
360 regulator-min-microvolt = <3000000>;
361 regulator-max-microvolt = <3000000>;
362 };
363
364 ab8500_ldo_aux5 {
365 regulator-name = "AUX5";
366 /* Intended for 1V8 for touchscreen but actually left unused */
367 regulator-min-microvolt = <1050000>;
368 regulator-max-microvolt = <2790000>;
369 };
370
371 ab8500_ldo_aux6 {
372 regulator-name = "AUX6";
373 /* Hammer to 1.8V for the display */
374 regulator-min-microvolt = <1800000>;
375 regulator-max-microvolt = <1800000>;
376 };
377
378 ab8500_ldo_aux8 {
379 /* Mostly VIO for sensors */
380 regulator-name = "AUX8";
381 };
382 };
383 };
384 };
385
386 /* I2C0 */
387 i2c@80004000 {
388 status = "okay";
389
390 pinctrl-names = "default", "sleep";
391 pinctrl-0 = <&i2c0_a_1_default>;
392 pinctrl-1 = <&i2c0_a_1_sleep>;
393
394 proximity@44 {
395 compatible = "sharp,gp2ap002s00f";
396 clock-frequency = <400000>;
397 reg = <0x44>;
398
399 interrupt-parent = <&gpio4>;
400 interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
401 vdd-supply = <&ab8500_ldo_aux1_reg>;
402 vio-supply = <&ab8500_ldo_aux8_reg>;
403 pinctrl-names = "default";
404 pinctrl-0 = <&gp2ap002_skomer_default>;
405 sharp,proximity-far-hysteresis = /bits/ 8 <0x2f>;
406 sharp,proximity-close-hysteresis = /bits/ 8 <0x0f>;
407 };
408 };
409
410
411 /* I2C2 */
412 i2c@80128000 {
413 status = "okay";
414
415 pinctrl-names = "default", "sleep";
416 pinctrl-0 = <&i2c2_b_2_default>;
417 pinctrl-1 = <&i2c2_b_2_sleep>;
418
419 accel@18 {
420 compatible = "bosch,bma254";
421 clock-frequency = <400000>;
422 reg = <0x18>;
423
424 /* GPIO224 used as "smart alert" interrupt */
425 interrupt-parent = <&gpio7>;
426 interrupts = <0 IRQ_TYPE_EDGE_RISING>;
427
428 mount-matrix = "0", "-1", "0",
429 "1", "0", "0",
430 "0", "0", "1";
431 vdd-supply = <&ab8500_ldo_aux1_reg>;
432 vddio-supply = <&ab8500_ldo_aux8_reg>;
433 pinctrl-names = "default";
434 pinctrl-0 = <&bma254_skomer_default>;
435 };
436 };
437
438 /* I2C3 */
439 i2c@80110000 {
440 status = "okay";
441
442 pinctrl-names = "default", "sleep";
443 pinctrl-0 = <&i2c3_c_2_default>;
444 pinctrl-1 = <&i2c3_c_2_sleep>;
445
446 /* Cypress CY8CTMA140 touchscreen */
447 touchscreen@20 {
448 compatible = "cypress,cy8ctma140";
449 clock-frequency = <400000>;
450 reg = <0x20>;
451
452 touchscreen-size-x = <480>;
453 touchscreen-size-y = <800>;
454 touchscreen-max-pressure = <255>;
455
456 /* GPIO218 for IRQ */
457 interrupt-parent = <&gpio6>;
458 interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
459
460 /* VDD is "digital supply" nominally 1.71-3.6V */
461 vdd-supply = <&ab8500_ldo_aux2_reg>;
462 /* VCPIN is "analog supply", 2.7-3.6 V */
463 vcpin-supply = <&ab8500_ldo_aux2_reg>;
464
465 pinctrl-names = "default";
466 pinctrl-0 = <&tma140_skomer_default>;
467 };
468 };
469
470 mcde@a0350000 {
471 status = "okay";
472 pinctrl-names = "default";
473 pinctrl-0 = <&dsi_default_mode>;
474
475 dsi@a0351000 {
476 panel {
477 /* NT35510-based Hydis HVA40WV1 */
478 compatible = "hydis,hva40wv1", "novatek,nt35510";
479 reg = <0>;
480 /* v_lcd_3v0 2.3-4.8V */
481 vdd-supply = <&ab8500_ldo_aux4_reg>;
482 /* v_lcd_1v8 1.65-3.3V */
483 vddi-supply = <&ab8500_ldo_aux6_reg>;
484 /* GPIO 139 */
485 reset-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>;
486 pinctrl-names = "default";
487 pinctrl-0 = <&display_default_mode>;
488 backlight = <&ktd253>;
489 };
490 };
491 };
492 };
493 };
494
495 &pinctrl {
496 sdi0 {
497 mc0_a_1_default {
498 default_cfg1 {
499 /* GPIO18, 19 & 20 unused so pull down */
500 ste,config = <&gpio_in_pd>;
501 };
502 };
503 };
504
505 /* This is a reset line for the eMMC */
506 sdi2 {
507 mc2_a_1_default {
508 default_cfg2 {
509 pins = "GPIO130_C8"; /* FBCLK */
510 ste,config = <&gpio_in_pd>;
511 };
512 };
513 };
514
515 mcde {
516 dsi_default_mode: dsi_default {
517 default_mux1 {
518 /* Mux in VSI0 used for DSI TE */
519 function = "lcd";
520 groups = "lcdvsi0_a_1"; /* VSI0 for LCD */
521 };
522 default_cfg1 {
523 pins = "GPIO68_E1"; /* VSI0 */
524 ste,config = <&in_nopull>;
525 };
526 };
527 };
528
529 /* Two GPIO lines used by the display */
530 display {
531 display_default_mode: display_default {
532 skomer_cfg1 {
533 /*
534 * OLED DETECT or check_pba, this appears to be high
535 * on "PBA" which I guess is "prototype board A".
536 */
537 pins = "GPIO93_B7";
538 ste,config = <&gpio_in_nopull>;
539 };
540 skomer_cfg2 {
541 pins = "GPIO139_C9";
542 /*
543 * MIPI_DSI0_RESET_N resets the display, leave high
544 * (de-asserted) so we only assert reset explicitly
545 * from the display driver.
546 */
547 ste,config = <&gpio_out_hi>;
548 };
549 };
550 };
551 backlight {
552 gpio_backlight_default_mode: backlight_default {
553 skomer_cfg1 {
554 pins = "GPIO69_E2"; /* LCD_BL_CTRL */
555 ste,config = <&gpio_out_lo>;
556 };
557 };
558 };
559 flash {
560 gpio_flash_default_mode: flash_default {
561 skomer_cfg1 {
562 pins = "GPIO140_B11", "GPIO141_C12";
563 ste,config = <&gpio_out_lo>;
564 };
565 };
566 };
567 /* GPIO that enables the 2.9V SD card level translator */
568 sd-level-translator {
569 sd_level_translator_default: sd_level_translator_default {
570 /* level shifter on GPIO87 */
571 skomer_cfg1 {
572 pins = "GPIO87_B3";
573 ste,config = <&gpio_out_hi>;
574 };
575 };
576 };
577 /* GPIO that enables the LDO regulator for the eMMC */
578 emmc-ldo {
579 emmc_ldo_en_default_mode: emmc_ldo_default {
580 /* LDO enable on GPIO223 */
581 skomer_cfg1 {
582 pins = "GPIO223_AH9";
583 ste,config = <&gpio_out_hi>;
584 };
585 };
586 };
587 /* GPIO keys */
588 gpio-keys {
589 gpio_keys_default_mode: gpio_keys_default {
590 skomer_cfg1 {
591 pins = "GPIO67_G2", /* VOL UP */
592 "GPIO91_B6", /* HOME */
593 "GPIO92_D6", /* VOL DOWN */
594 "GPIO204_AF23", /* MENU */
595 "GPIO205_AG23"; /* BACK */
596 ste,config = <&gpio_in_pu>;
597 };
598 };
599 };
600 /* Interrupt line for BMA254 */
601 bma254 {
602 bma254_skomer_default: bma254_skomer {
603 skomer_cfg1 {
604 pins = "GPIO224_AG9";
605 ste,config = <&gpio_in_pd>;
606 };
607 };
608 };
609 /* Interrupt line for light/proximity sensor GP2AP002 */
610 gp2ap002 {
611 gp2ap002_skomer_default: gp2ap002_skomer {
612 skomer_cfg1 {
613 pins = "GPIO146_D13";
614 ste,config = <&gpio_in_nopull>;
615 };
616 };
617 };
618 /* GPIO-based I2C bus for NCP6914 */
619 i2c-gpio-0 {
620 i2c_gpio_0_default: i2c_gpio_0 {
621 skomer_cfg1 {
622 pins = "GPIO143_D12", "GPIO144_B13";
623 ste,config = <&gpio_in_nopull>;
624 };
625 };
626 };
627 /* GPIO-based I2C bus for ALPS HSCD compass */
628 i2c-gpio-1 {
629 i2c_gpio_1_default: i2c_gpio_1 {
630 skomer_cfg1 {
631 pins = "GPIO151_B17", "GPIO152_D16";
632 ste,config = <&gpio_in_nopull>;
633 };
634 };
635 };
636 wlan {
637 wlan_default_mode: wlan_default {
638 skomer_cfg1 {
639 pins = "GPIO216_AG12";
640 ste,config = <&gpio_in_pd>;
641 };
642 };
643 wlan_en_default_mode: wlan_en_default {
644 skomer_cfg2 {
645 pins = "GPIO215_AH13";
646 ste,config = <&gpio_out_lo>;
647 };
648 };
649 };
650 bluetooth {
651 bluetooth_default_mode: bluetooth_default {
652 skomer_cfg1 {
653 pins = "GPIO199_AH23", "GPIO222_AJ9";
654 ste,config = <&gpio_out_lo>;
655 };
656 skomer_cfg2 {
657 pins = "GPIO97_D9";
658 ste,config = <&gpio_in_nopull>;
659 };
660 };
661 };
662 vibrator {
663 vibrator_default: vibrator_default {
664 skomer_cfg1 {
665 pins = "GPIO195_AG28"; /* MOT_EN */
666 ste,config = <&gpio_out_lo>;
667 };
668 };
669 };
670 /* Interrupt line for the Cypress TMA140 touchscreen */
671 touchscreen {
672 tma140_skomer_default: tma140_skomer {
673 skomer_cfg1 {
674 pins = "GPIO218_AH11";
675 ste,config = <&gpio_in_nopull>;
676 };
677 };
678 };
679 g05ta03 {
680 g05ta03_skomer_default: g05ta03 {
681 /* Reset line, start out de-asserted */
682 skomer_cfg1 {
683 pins = "GPIO209_AG15";
684 ste,config = <&gpio_out_hi>;
685 };
686 /* GPS_ON_OFF, start out deasserted (off) */
687 skomer_cfg2 {
688 pins = "GPIO86_C6";
689 ste,config = <&gpio_out_lo>;
690 };
691 };
692 };
693 };
694
695 &ab8505_gpio {
696 /* Hog a few default settings */
697 pinctrl-names = "default";
698 pinctrl-0 = <&gpio_default>;
699
700 gpio {
701 gpio_default: gpio_default {
702 skomer_mux {
703 /* Change unused pins to GPIO mode */
704 function = "gpio";
705 groups = "gpio3_a_1", /* default: SysClkReq4 */
706 "gpio14_a_1"; /* default: PWMOut1 */
707 };
708 skomer_cfg1 {
709 pins = "GPIO11_B17", "GPIO13_D17", "GPIO50_L4";
710 bias-disable;
711 };
712 };
713 };
714 };
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