Merge tag 'pci-v5.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
[linux-2.6-microblaze.git] / arch / arm / boot / dts / ste-ux500-samsung-skomer.dts
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         /* TI TXS0206 level translator for 2.9 V */
28         sd_level_translator: regulator-gpio {
29                 compatible = "regulator-fixed";
30
31                 /* GPIO87 EN */
32                 gpios = <&gpio2 23 GPIO_ACTIVE_HIGH>;
33                 enable-active-high;
34
35                 regulator-name = "sd-level-translator";
36                 regulator-min-microvolt = <2900000>;
37                 regulator-max-microvolt = <2900000>;
38                 regulator-type = "voltage";
39
40                 startup-delay-us = <200>;
41
42                 pinctrl-names = "default";
43                 pinctrl-0 = <&sd_level_translator_default>;
44         };
45
46         /* External LDO MIC5366-3.3YMT for eMMC */
47         ldo_3v3_reg: regulator-gpio-ldo-3v3 {
48                 compatible = "regulator-fixed";
49                 regulator-name = "en-3v3-fixed-supply";
50                 regulator-min-microvolt = <3300000>;
51                 regulator-max-microvolt = <3300000>;
52                 gpio = <&gpio6 31 GPIO_ACTIVE_HIGH>;
53                 startup-delay-us = <5000>;
54                 enable-active-high;
55                 pinctrl-names = "default";
56                 pinctrl-0 = <&emmc_ldo_en_default_mode>;
57         };
58
59         wlan_en: regulator-gpio-wlan-en {
60                 compatible = "regulator-fixed";
61                 regulator-name = "wl-reg-on";
62                 regulator-min-microvolt = <3000000>;
63                 regulator-max-microvolt = <3000000>;
64                 startup-delay-us = <200000>;
65                 /* GPIO215 WLAN_EN */
66                 gpio = <&gpio6 23 GPIO_ACTIVE_HIGH>;
67                 enable-active-high;
68                 pinctrl-names = "default";
69                 pinctrl-0 = <&wlan_en_default_mode>;
70         };
71
72         vibrator {
73                 compatible = "gpio-vibrator";
74                 enable-gpios = <&gpio6 3 GPIO_ACTIVE_HIGH>;
75                 pinctrl-names = "default";
76                 pinctrl-0 = <&vibrator_default>;
77         };
78
79         gpio-keys {
80                 compatible = "gpio-keys";
81                 pinctrl-names = "default";
82                 pinctrl-0 = <&gpio_keys_default_mode>;
83
84                 button-home {
85                         linux,code = <KEY_HOME>;
86                         label = "HOME";
87                         /* GPIO91 */
88                         gpios = <&gpio2 27 GPIO_ACTIVE_LOW>;
89                 };
90                 button-volup {
91                         linux,code = <KEY_VOLUMEUP>;
92                         label = "VOL+";
93                         /* GPIO67 */
94                         gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
95                 };
96                 button-voldown {
97                         linux,code = <KEY_VOLUMEDOWN>;
98                         label = "VOL-";
99                         /* GPIO92 */
100                         gpios = <&gpio2 28 GPIO_ACTIVE_LOW>;
101                 };
102                 button-menu {
103                         linux,code = <KEY_MENU>;
104                         label = "MENU";
105                         /* GPIO204 */
106                         gpios = <&gpio6 12 GPIO_ACTIVE_LOW>;
107                 };
108                 button-back {
109                         linux,code = <KEY_BACK>;
110                         label = "BACK";
111                         /* GPIO205 */
112                         gpios = <&gpio6 13 GPIO_ACTIVE_LOW>;
113                 };
114         };
115
116         ktd253: backlight {
117                 compatible = "kinetic,ktd253";
118                 /* GPIO 69 */
119                 enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
120                 /* Default to 13/32 brightness */
121                 default-brightness = <13>;
122                 pinctrl-names = "default";
123                 pinctrl-0 = <&gpio_backlight_default_mode>;
124         };
125
126         /* Richtek RT8515GQW Flash LED Driver IC */
127         flash {
128                 compatible = "richtek,rt8515";
129                 /* GPIO 140 */
130                 enf-gpios = <&gpio4 12 GPIO_ACTIVE_HIGH>;
131                 /* GPIO 141 */
132                 ent-gpios = <&gpio4 13 GPIO_ACTIVE_HIGH>;
133                 /*
134                  * RFS is 16 kOhm and RTS is 100 kOhm giving
135                  * the flash max current 343mA and torch max
136                  * current 55 mA.
137                  */
138                 richtek,rfs-ohms = <16000>;
139                 richtek,rts-ohms = <100000>;
140                 pinctrl-names = "default";
141                 pinctrl-0 = <&gpio_flash_default_mode>;
142
143                 led {
144                         function = LED_FUNCTION_FLASH;
145                         color = <LED_COLOR_ID_WHITE>;
146                         flash-max-timeout-us = <250000>;
147                         flash-max-microamp = <343750>;
148                         led-max-microamp = <55000>;
149                 };
150         };
151
152         i2c-gpio-0 {
153                 compatible = "i2c-gpio";
154                 sda-gpios = <&gpio4 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
155                 scl-gpios = <&gpio4 15 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
156                 pinctrl-names = "default";
157                 pinctrl-0 = <&i2c_gpio_0_default>;
158                 #address-cells = <1>;
159                 #size-cells = <0>;
160                 /* TODO: this should be used by the NCP6914 Camera power management unit */
161         };
162
163         i2c-gpio-1 {
164                 compatible = "i2c-gpio";
165                 sda-gpios = <&gpio4 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
166                 scl-gpios = <&gpio4 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
167                 pinctrl-names = "default";
168                 pinctrl-0 = <&i2c_gpio_1_default>;
169                 #address-cells = <1>;
170                 #size-cells = <0>;
171                 magnetometer@c {
172                         compatible = "alps,hscdtd008a";
173                         reg = <0x0c>;
174                         avdd-supply = <&ab8500_ldo_aux1_reg>;
175                         dvdd-supply = <&ab8500_ldo_aux8_reg>;
176                 };
177         };
178
179         soc {
180                 // External Micro SD slot
181                 mmc@80126000 {
182                         arm,primecell-periphid = <0x10480180>;
183                         max-frequency = <100000000>;
184                         bus-width = <4>;
185                         cap-sd-highspeed;
186                         cap-mmc-highspeed;
187                         /* All direction control is used */
188                         st,sig-dir-cmd;
189                         st,sig-dir-dat0;
190                         st,sig-dir-dat2;
191                         st,sig-dir-dat31;
192                         st,sig-pin-fbclk;
193                         full-pwr-cycle;
194                         vmmc-supply = <&ab8500_ldo_aux3_reg>;
195                         vqmmc-supply = <&sd_level_translator>;
196                         pinctrl-names = "default", "sleep";
197                         pinctrl-0 = <&mc0_a_1_default>;
198                         pinctrl-1 = <&mc0_a_1_sleep>;
199                         status = "okay";
200                 };
201
202                 // WLAN SDIO channel
203                 mmc@80118000 {
204                         arm,primecell-periphid = <0x10480180>;
205                         max-frequency = <50000000>;
206                         bus-width = <4>;
207                         non-removable;
208                         cap-sd-highspeed;
209                         vmmc-supply = <&wlan_en>;
210                         pinctrl-names = "default", "sleep";
211                         pinctrl-0 = <&mc1_a_2_default>;
212                         pinctrl-1 = <&mc1_a_2_sleep>;
213                         status = "okay";
214                         #address-cells = <1>;
215                         #size-cells = <0>;
216
217                         wifi@1 {
218                                 compatible = "brcm,bcm4334-fmac", "brcm,bcm4329-fmac";
219                                 reg = <1>;
220                                 /* GPIO216 WL_HOST_WAKE */
221                                 interrupt-parent = <&gpio6>;
222                                 interrupts = <24 IRQ_TYPE_EDGE_FALLING>;
223                                 interrupt-names = "host-wake";
224                                 pinctrl-names = "default";
225                                 pinctrl-0 = <&wlan_default_mode>;
226                         };
227                 };
228
229                 /*
230                  * eMMC seems to be mostly Samsung KLM4G1YE4C "4YMD1R"
231                  */
232                 mmc@80005000 {
233                         arm,primecell-periphid = <0x10480180>;
234                         max-frequency = <100000000>;
235                         bus-width = <8>;
236                         non-removable;
237                         cap-mmc-highspeed;
238                         mmc-ddr-1_8v;
239                         no-sdio;
240                         no-sd;
241                         /* From datasheet page 26 figure 9: 300 ms set-up time for 4GB */
242                         post-power-on-delay-ms = <300>;
243                         vmmc-supply = <&ldo_3v3_reg>;
244                         pinctrl-names = "default", "sleep";
245                         pinctrl-0 = <&mc2_a_1_default>;
246                         pinctrl-1 = <&mc2_a_1_sleep>;
247
248                         status = "okay";
249                 };
250
251                 /* GBF (Bluetooth) UART */
252                 uart@80120000 {
253                         pinctrl-names = "default", "sleep";
254                         pinctrl-0 = <&u0_a_1_default>;
255                         pinctrl-1 = <&u0_a_1_sleep>;
256                         status = "okay";
257
258                         /* FIXME: not quite working yet, probably needs regulators */
259                         bluetooth {
260                                 /* BCM4334B0 actually */
261                                 compatible = "brcm,bcm4330-bt";
262                                 shutdown-gpios = <&gpio6 30 GPIO_ACTIVE_HIGH>;
263                                 device-wakeup-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
264                                 host-wakeup-gpios = <&gpio3 1 GPIO_ACTIVE_HIGH>;
265                                 pinctrl-names = "default";
266                                 pinctrl-0 = <&bluetooth_default_mode>;
267                         };
268                 };
269
270                 /* GPF UART */
271                 uart@80121000 {
272                         status = "okay";
273                         pinctrl-names = "default", "sleep";
274                         pinctrl-0 = <&u1rxtx_a_1_default &u1ctsrts_a_1_default>;
275                         pinctrl-1 = <&u1rxtx_a_1_sleep &u1ctsrts_a_1_sleep>;
276                 };
277
278                 /* Debugging console UART connected to AB8505 USB */
279                 uart@80007000 {
280                         status = "okay";
281                         pinctrl-names = "default", "sleep";
282                         pinctrl-0 = <&u2rxtx_c_1_default>;
283                         pinctrl-1 = <&u2rxtx_c_1_sleep>;
284                 };
285
286                 prcmu@80157000 {
287                         ab8505 {
288                                 ab8500_usb {
289                                         pinctrl-names = "default", "sleep";
290                                         pinctrl-0 = <&usb_a_1_default>;
291                                         pinctrl-1 = <&usb_a_1_sleep>;
292                                 };
293
294                                 ab8505-regulators {
295                                         ab8500_ldo_aux1 {
296                                                 /* Used for VDD for sensors */
297                                                 regulator-name = "AUX1";
298                                                 regulator-min-microvolt = <3000000>;
299                                                 regulator-max-microvolt = <3300000>;
300                                         };
301
302                                         ab8500_ldo_aux2 {
303                                                 /* Supplies the Cypress TMA140 touchscreen only with 3.0V */
304                                                 regulator-name = "AUX2";
305                                                 regulator-min-microvolt = <3000000>;
306                                                 regulator-max-microvolt = <3000000>;
307                                         };
308
309                                         ab8500_ldo_aux3 {
310                                                 /* Used for voltage for external MMC/SD card */
311                                                 regulator-name = "AUX3";
312                                                 regulator-min-microvolt = <1100000>;
313                                                 regulator-max-microvolt = <3300000>;
314                                         };
315
316                                         ab8500_ldo_aux4 {
317                                                 regulator-name = "AUX4";
318                                                 /* Hammer to 3.0V for the display */
319                                                 regulator-min-microvolt = <3000000>;
320                                                 regulator-max-microvolt = <3000000>;
321                                         };
322
323                                         ab8500_ldo_aux5 {
324                                                 regulator-name = "AUX5";
325                                                 /* Intended for 1V8 for touchscreen but actually left unused */
326                                                 regulator-min-microvolt = <1050000>;
327                                                 regulator-max-microvolt = <2790000>;
328                                         };
329
330                                         ab8500_ldo_aux6 {
331                                                 regulator-name = "AUX6";
332                                                 /* Hammer to 1.8V for the display */
333                                                 regulator-min-microvolt = <1800000>;
334                                                 regulator-max-microvolt = <1800000>;
335                                         };
336
337                                         ab8500_ldo_aux8 {
338                                                 /* Mostly VIO for sensors */
339                                                 regulator-name = "AUX8";
340                                         };
341                                 };
342                         };
343                 };
344
345                 /* I2C0 */
346                 i2c@80004000 {
347                         status = "okay";
348
349                         pinctrl-names = "default", "sleep";
350                         pinctrl-0 = <&i2c0_a_1_default>;
351                         pinctrl-1 = <&i2c0_a_1_sleep>;
352
353                         proximity@44 {
354                                 compatible = "sharp,gp2ap002s00f";
355                                 clock-frequency = <400000>;
356                                 reg = <0x44>;
357
358                                 interrupt-parent = <&gpio4>;
359                                 interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
360                                 vdd-supply = <&ab8500_ldo_aux1_reg>;
361                                 vio-supply = <&ab8500_ldo_aux8_reg>;
362                                 pinctrl-names = "default";
363                                 pinctrl-0 = <&gp2ap002_skomer_default>;
364                                 sharp,proximity-far-hysteresis = /bits/ 8 <0x2f>;
365                                 sharp,proximity-close-hysteresis = /bits/ 8 <0x0f>;
366                         };
367                 };
368
369
370                 /* I2C2 */
371                 i2c@80128000 {
372                         status = "okay";
373
374                         pinctrl-names = "default", "sleep";
375                         pinctrl-0 = <&i2c2_b_2_default>;
376                         pinctrl-1 = <&i2c2_b_2_sleep>;
377
378                         accel@18 {
379                                 compatible = "bosch,bma254";
380                                 clock-frequency = <400000>;
381                                 reg = <0x18>;
382
383                                 /* GPIO224 used as "smart alert" interrupt */
384                                 interrupt-parent = <&gpio7>;
385                                 interrupts = <0 IRQ_TYPE_EDGE_RISING>;
386
387                                 mount-matrix = "0", "-1", "0",
388                                               "1", "0", "0",
389                                                "0", "0", "1";
390                                 vdd-supply = <&ab8500_ldo_aux1_reg>;
391                                 vddio-supply = <&ab8500_ldo_aux8_reg>;
392                                 pinctrl-names = "default";
393                                 pinctrl-0 = <&bma254_skomer_default>;
394                         };
395                 };
396
397                 /* I2C3 */
398                 i2c@80110000 {
399                         status = "okay";
400
401                         pinctrl-names = "default", "sleep";
402                         pinctrl-0 = <&i2c3_c_2_default>;
403                         pinctrl-1 = <&i2c3_c_2_sleep>;
404
405                         /* Cypress CY8CTMA140 touchscreen */
406                         touchscreen@20 {
407                                 compatible = "cypress,cy8ctma140";
408                                 clock-frequency = <400000>;
409                                 reg = <0x20>;
410
411                                 touchscreen-size-x = <480>;
412                                 touchscreen-size-y = <800>;
413                                 touchscreen-max-pressure = <255>;
414
415                                 /* GPIO218 for IRQ */
416                                 interrupt-parent = <&gpio6>;
417                                 interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
418
419                                 /* VDD is "digital supply" nominally 1.71-3.6V */
420                                 vdd-supply = <&ab8500_ldo_aux2_reg>;
421                                 /* VCPIN is "analog supply", 2.7-3.6 V */
422                                 vcpin-supply = <&ab8500_ldo_aux2_reg>;
423
424                                 pinctrl-names = "default";
425                                 pinctrl-0 = <&tma140_skomer_default>;
426                         };
427                 };
428
429                 mcde@a0350000 {
430                         status = "okay";
431                         pinctrl-names = "default";
432                         pinctrl-0 = <&dsi_default_mode>;
433
434                         dsi@a0351000 {
435                                 panel {
436                                         /* NT35510-based Hydis HVA40WV1 */
437                                         compatible = "hydis,hva40wv1", "novatek,nt35510";
438                                         reg = <0>;
439                                         /* v_lcd_3v0 2.3-4.8V */
440                                         vdd-supply = <&ab8500_ldo_aux4_reg>;
441                                         /* v_lcd_1v8 1.65-3.3V */
442                                         vddi-supply = <&ab8500_ldo_aux6_reg>;
443                                         /* GPIO 139 */
444                                         reset-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>;
445                                         pinctrl-names = "default";
446                                         pinctrl-0 = <&display_default_mode>;
447                                         backlight = <&ktd253>;
448                                 };
449                         };
450                 };
451         };
452 };
453
454 &pinctrl {
455         sdi0 {
456                 mc0_a_1_default {
457                         default_cfg1 {
458                                 /* GPIO18, 19 & 20 unused so pull down */
459                                 ste,config = <&gpio_in_pd>;
460                         };
461                 };
462         };
463
464         /* This is a reset line for the eMMC */
465         sdi2 {
466                 mc2_a_1_default {
467                         default_cfg2 {
468                                 pins = "GPIO130_C8"; /* FBCLK */
469                                 ste,config = <&gpio_in_pd>;
470                         };
471                 };
472         };
473
474         mcde {
475                 dsi_default_mode: dsi_default {
476                         default_mux1 {
477                                 /* Mux in VSI0 used for DSI TE */
478                                 function = "lcd";
479                                 groups = "lcdvsi0_a_1"; /* VSI0 for LCD */
480                         };
481                         default_cfg1 {
482                                 pins = "GPIO68_E1"; /* VSI0 */
483                                 ste,config = <&in_nopull>;
484                         };
485                 };
486         };
487
488         /* Two GPIO lines used by the display */
489         display {
490                 display_default_mode: display_default {
491                         skomer_cfg1 {
492                                 /*
493                                  * OLED DETECT or check_pba, this appears to be high
494                                  * on "PBA" which I guess is "prototype board A".
495                                  */
496                                 pins = "GPIO93_B7";
497                                 ste,config = <&gpio_in_nopull>;
498                         };
499                         skomer_cfg2 {
500                                 pins = "GPIO139_C9";
501                                 /*
502                                  * MIPI_DSI0_RESET_N resets the display, leave high
503                                  * (de-asserted) so we only assert reset explicitly
504                                  * from the display driver.
505                                  */
506                                 ste,config = <&gpio_out_hi>;
507                         };
508                 };
509         };
510         backlight {
511                 gpio_backlight_default_mode: backlight_default {
512                         skomer_cfg1 {
513                                 pins = "GPIO69_E2"; /* LCD_BL_CTRL */
514                                 ste,config = <&gpio_out_lo>;
515                         };
516                 };
517         };
518         flash {
519                 gpio_flash_default_mode: flash_default {
520                         skomer_cfg1 {
521                                 pins = "GPIO140_B11", "GPIO141_C12";
522                                 ste,config = <&gpio_out_lo>;
523                         };
524                 };
525         };
526         /* GPIO that enables the 2.9V SD card level translator */
527         sd-level-translator {
528                 sd_level_translator_default: sd_level_translator_default {
529                         /* level shifter on GPIO87 */
530                         skomer_cfg1 {
531                                 pins = "GPIO87_B3";
532                                 ste,config = <&gpio_out_hi>;
533                         };
534                 };
535         };
536         /* GPIO that enables the LDO regulator for the eMMC */
537         emmc-ldo {
538                 emmc_ldo_en_default_mode: emmc_ldo_default {
539                         /* LDO enable on GPIO223 */
540                         skomer_cfg1 {
541                                 pins = "GPIO223_AH9";
542                                 ste,config = <&gpio_out_hi>;
543                         };
544                 };
545         };
546         /* GPIO keys */
547         gpio-keys {
548                 gpio_keys_default_mode: gpio_keys_default {
549                         skomer_cfg1 {
550                                 pins = "GPIO67_G2", /* VOL UP */
551                                        "GPIO91_B6", /* HOME */
552                                        "GPIO92_D6", /* VOL DOWN */
553                                        "GPIO204_AF23", /* MENU */
554                                        "GPIO205_AG23"; /* BACK */
555                                         ste,config = <&gpio_in_pu>;
556                         };
557                 };
558         };
559         /* Interrupt line for BMA254 */
560         bma254 {
561                 bma254_skomer_default: bma254_skomer {
562                         skomer_cfg1 {
563                                 pins = "GPIO224_AG9";
564                                 ste,config = <&gpio_in_pd>;
565                         };
566                 };
567         };
568         /* Interrupt line for light/proximity sensor GP2AP002 */
569         gp2ap002 {
570                 gp2ap002_skomer_default: gp2ap002_skomer {
571                         skomer_cfg1 {
572                                 pins = "GPIO146_D13";
573                                 ste,config = <&gpio_in_nopull>;
574                         };
575                 };
576         };
577         /* GPIO-based I2C bus for NCP6914 */
578         i2c-gpio-0 {
579                 i2c_gpio_0_default: i2c_gpio_0 {
580                         skomer_cfg1 {
581                                 pins = "GPIO143_D12", "GPIO144_B13";
582                                 ste,config = <&gpio_in_nopull>;
583                         };
584                 };
585         };
586         /* GPIO-based I2C bus for ALPS HSCD compass */
587         i2c-gpio-1 {
588                 i2c_gpio_1_default: i2c_gpio_1 {
589                         skomer_cfg1 {
590                                 pins = "GPIO151_B17", "GPIO152_D16";
591                                 ste,config = <&gpio_in_nopull>;
592                         };
593                 };
594         };
595         wlan {
596                 wlan_default_mode: wlan_default {
597                         skomer_cfg1 {
598                                 pins = "GPIO216_AG12";
599                                 ste,config = <&gpio_in_pd>;
600                         };
601                 };
602                 wlan_en_default_mode: wlan_en_default {
603                         skomer_cfg2 {
604                                 pins = "GPIO215_AH13";
605                                 ste,config = <&gpio_out_lo>;
606                         };
607                 };
608         };
609         bluetooth {
610                 bluetooth_default_mode: bluetooth_default {
611                         skomer_cfg1 {
612                                 pins = "GPIO199_AH23", "GPIO222_AJ9";
613                                 ste,config = <&gpio_out_lo>;
614                         };
615                         skomer_cfg2 {
616                                 pins = "GPIO97_D9";
617                                 ste,config = <&gpio_in_nopull>;
618                         };
619                 };
620         };
621         vibrator {
622                 vibrator_default: vibrator_default {
623                         skomer_cfg1 {
624                                 pins = "GPIO195_AG28";  /* MOT_EN */
625                                 ste,config = <&gpio_out_lo>;
626                         };
627                 };
628         };
629         /* Interrupt line for the Cypress TMA140 touchscreen */
630         touchscreen {
631                 tma140_skomer_default: tma140_skomer {
632                         skomer_cfg1 {
633                                 pins = "GPIO218_AH11";
634                                 ste,config = <&gpio_in_nopull>;
635                         };
636                 };
637         };
638 };
639
640 &ab8505_gpio {
641         /* Hog a few default settings */
642         pinctrl-names = "default";
643         pinctrl-0 = <&gpio_default>;
644
645         gpio {
646                 gpio_default: gpio_default {
647                         skomer_mux {
648                                 /* Change unused pins to GPIO mode */
649                                 function = "gpio";
650                                 groups = "gpio3_a_1",   /* default: SysClkReq4 */
651                                          "gpio14_a_1";  /* default: PWMOut1 */
652                         };
653                         skomer_cfg1 {
654                                 pins = "GPIO11_B17", "GPIO13_D17", "GPIO50_L4";
655                                 bias-disable;
656                         };
657                 };
658         };
659 };