sys/gnu/dts/arm/exynos5250-arndale.dts

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Samsung's Exynos5250 based Arndale board device tree source
   4  *
   5  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
   6  *              http://www.samsung.com
   7  */
   8
   9 /dts-v1/;
  10 #include <dt-bindings/gpio/gpio.h>
  11 #include <dt-bindings/interrupt-controller/irq.h>
  12 #include <dt-bindings/input/input.h>
  13 #include <dt-bindings/clock/samsung,s2mps11.h>
  14 #include <dt-bindings/sound/samsung-i2s.h>
  15 #include "exynos5250.dtsi"
  16
  17 / {
  18         model = "Insignal Arndale evaluation board based on Exynos5250";
  19         compatible = "insignal,arndale", "samsung,exynos5250", "samsung,exynos5";
  20
  21         memory@40000000 {
  22                 device_type = "memory";
  23                 reg = <0x40000000 0x80000000>;
  24         };
  25
  26         chosen {
  27                 stdout-path = "serial2:115200n8";
  28         };
  29
  30         gpio_keys {
  31                 compatible = "gpio-keys";
  32
  33                 menu {
  34                         label = "SW-TACT2";
  35                         gpios = <&gpx1 4 GPIO_ACTIVE_LOW>;
  36                         linux,code = <KEY_MENU>;
  37                         wakeup-source;
  38                 };
  39
  40                 home {
  41                         label = "SW-TACT3";
  42                         gpios = <&gpx1 5 GPIO_ACTIVE_LOW>;
  43                         linux,code = <KEY_HOME>;
  44                         wakeup-source;
  45                 };
  46
  47                 up {
  48                         label = "SW-TACT4";
  49                         gpios = <&gpx1 6 GPIO_ACTIVE_LOW>;
  50                         linux,code = <KEY_UP>;
  51                         wakeup-source;
  52                 };
  53
  54                 down {
  55                         label = "SW-TACT5";
  56                         gpios = <&gpx1 7 GPIO_ACTIVE_LOW>;
  57                         linux,code = <KEY_DOWN>;
  58                         wakeup-source;
  59                 };
  60
  61                 back {
  62                         label = "SW-TACT6";
  63                         gpios = <&gpx2 0 GPIO_ACTIVE_LOW>;
  64                         linux,code = <KEY_BACK>;
  65                         wakeup-source;
  66                 };
  67
  68                 wakeup {
  69                         label = "SW-TACT7";
  70                         gpios = <&gpx2 1 GPIO_ACTIVE_LOW>;
  71                         linux,code = <KEY_WAKEUP>;
  72                         wakeup-source;
  73                 };
  74         };
  75
  76         panel: panel {
  77                 compatible = "boe,hv070wsa-100";
  78                 power-supply = <&vcc_3v3_reg>;
  79                 enable-gpios = <&gpd1 3 GPIO_ACTIVE_HIGH>;
  80                 port {
  81                         panel_ep: endpoint {
  82                                 remote-endpoint = <&bridge_out_ep>;
  83                         };
  84                 };
  85         };
  86
  87         regulators {
  88                 compatible = "simple-bus";
  89                 #address-cells = <1>;
  90                 #size-cells = <0>;
  91
  92                 main_dc_reg: regulator@0 {
  93                         compatible = "regulator-fixed";
  94                         reg = <0>;
  95                         regulator-name = "MAIN_DC";
  96                         regulator-always-on;
  97                 };
  98
  99                 mmc_reg: regulator@1 {
 100                         compatible = "regulator-fixed";
 101                         reg = <1>;
 102                         regulator-name = "VDD_MMC";
 103                         regulator-min-microvolt = <2800000>;
 104                         regulator-max-microvolt = <2800000>;
 105                         regulator-always-on;
 106                 };
 107
 108                 reg_hdmi_en: regulator@2 {
 109                         compatible = "regulator-fixed";
 110                         reg = <2>;
 111                         regulator-name = "hdmi-en";
 112                         regulator-always-on;
 113                 };
 114
 115                 vcc_1v2_reg: regulator@3 {
 116                         compatible = "regulator-fixed";
 117                         reg = <3>;
 118                         regulator-name = "VCC_1V2";
 119                         regulator-min-microvolt = <1200000>;
 120                         regulator-max-microvolt = <1200000>;
 121                         regulator-always-on;
 122                 };
 123
 124                 vcc_1v8_reg: regulator@4 {
 125                         compatible = "regulator-fixed";
 126                         reg = <4>;
 127                         regulator-name = "VCC_1V8";
 128                         regulator-min-microvolt = <1800000>;
 129                         regulator-max-microvolt = <1800000>;
 130                         regulator-always-on;
 131                 };
 132
 133                 vcc_3v3_reg: regulator@5 {
 134                         compatible = "regulator-fixed";
 135                         reg = <5>;
 136                         regulator-name = "VCC_3V3";
 137                         regulator-min-microvolt = <3300000>;
 138                         regulator-max-microvolt = <3300000>;
 139                         regulator-always-on;
 140                 };
 141         };
 142
 143         sound {
 144                 compatible = "samsung,arndale-wm1811";
 145                 samsung,audio-cpu = <&i2s0>;
 146                 samsung,audio-codec = <&wm1811>;
 147         };
 148
 149         fixed-rate-clocks {
 150                 xxti {
 151                         compatible = "samsung,clock-xxti";
 152                         clock-frequency = <24000000>;
 153                 };
 154         };
 155
 156         // SMSC USB3503 connected in hardware only mode as a PHY
 157         usb_hub: usb-hub {
 158                 compatible = "smsc,usb3503a";
 159
 160                 reset-gpios = <&gpx3 5 GPIO_ACTIVE_LOW>;
 161                 connect-gpios = <&gpd1 7 GPIO_ACTIVE_HIGH>;
 162         };
 163 };
 164
 165 &clock {
 166         assigned-clocks = <&clock CLK_FOUT_EPLL>;
 167         assigned-clock-rates = <49152000>;
 168 };
 169
 170 &clock_audss {
 171         assigned-clocks = <&clock_audss EXYNOS_MOUT_AUDSS>;
 172         assigned-clock-parents = <&clock CLK_FOUT_EPLL>;
 173 };
 174
 175 &cpu0 {
 176         cpu0-supply = <&buck2_reg>;
 177 };
 178
 179 &dsi_0 {
 180         vddcore-supply = <&ldo8_reg>;
 181         vddio-supply = <&ldo10_reg>;
 182         samsung,pll-clock-frequency = <24000000>;
 183         samsung,burst-clock-frequency = <320000000>;
 184         samsung,esc-clock-frequency = <10000000>;
 185         status = "okay";
 186
 187         bridge@0 {
 188                 reg = <0>;
 189                 compatible = "toshiba,tc358764";
 190                 vddc-supply = <&vcc_1v2_reg>;
 191                 vddio-supply = <&vcc_1v8_reg>;
 192                 vddlvds-supply = <&vcc_3v3_reg>;
 193                 reset-gpios = <&gpd1 6 GPIO_ACTIVE_LOW>;
 194                 #address-cells = <1>;
 195                 #size-cells = <0>;
 196                 port@1 {
 197                         reg = <1>;
 198                         bridge_out_ep: endpoint {
 199                                 remote-endpoint = <&panel_ep>;
 200                         };
 201                 };
 202         };
 203 };
 204
 205 &fimd {
 206         status = "okay";
 207 };
 208
 209 &hdmi {
 210         pinctrl-names = "default";
 211         pinctrl-0 = <&hdmi_hpd>;
 212         status = "okay";
 213         ddc = <&i2c_ddc>;
 214         hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 215         vdd_osc-supply = <&ldo10_reg>;
 216         vdd_pll-supply = <&ldo8_reg>;
 217         vdd-supply = <&ldo8_reg>;
 218 };
 219
 220 &i2c_0 {
 221         status = "okay";
 222         samsung,i2c-sda-delay = <100>;
 223         samsung,i2c-max-bus-freq = <20000>;
 224         samsung,i2c-slave-addr = <0x66>;
 225
 226         s5m8767_pmic@66 {
 227                 compatible = "samsung,s5m8767-pmic";
 228                 reg = <0x66>;
 229                 interrupt-parent = <&gpx3>;
 230                 interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 231                 pinctrl-names = "default";
 232                 pinctrl-0 = <&s5m8767_irq>;
 233
 234                 vinb1-supply = <&main_dc_reg>;
 235                 vinb2-supply = <&main_dc_reg>;
 236                 vinb3-supply = <&main_dc_reg>;
 237                 vinb4-supply = <&main_dc_reg>;
 238                 vinb5-supply = <&main_dc_reg>;
 239                 vinb6-supply = <&main_dc_reg>;
 240                 vinb7-supply = <&main_dc_reg>;
 241                 vinb8-supply = <&main_dc_reg>;
 242                 vinb9-supply = <&main_dc_reg>;
 243
 244                 vinl1-supply = <&buck7_reg>;
 245                 vinl2-supply = <&buck7_reg>;
 246                 vinl3-supply = <&buck7_reg>;
 247                 vinl4-supply = <&main_dc_reg>;
 248                 vinl5-supply = <&main_dc_reg>;
 249                 vinl6-supply = <&main_dc_reg>;
 250                 vinl7-supply = <&main_dc_reg>;
 251                 vinl8-supply = <&buck8_reg>;
 252                 vinl9-supply = <&buck8_reg>;
 253
 254                 s5m8767,pmic-buck2-dvs-voltage = <1300000>;
 255                 s5m8767,pmic-buck3-dvs-voltage = <1100000>;
 256                 s5m8767,pmic-buck4-dvs-voltage = <1200000>;
 257                 s5m8767,pmic-buck-dvs-gpios = <&gpd1 0 GPIO_ACTIVE_HIGH>,
 258                                               <&gpd1 1 GPIO_ACTIVE_HIGH>,
 259                                               <&gpd1 2 GPIO_ACTIVE_HIGH>;
 260                 s5m8767,pmic-buck-ds-gpios = <&gpx2 3 GPIO_ACTIVE_HIGH>,
 261                                              <&gpx2 4 GPIO_ACTIVE_HIGH>,
 262                                              <&gpx2 5 GPIO_ACTIVE_HIGH>;
 263
 264                 s5m8767_osc: clocks {
 265                         compatible = "samsung,s5m8767-clk";
 266                         #clock-cells = <1>;
 267                         clock-output-names = "s5m8767_ap", "unused1", "unused2";
 268                 };
 269
 270                 regulators {
 271                         ldo1_reg: LDO1 {
 272                                 regulator-name = "VDD_ALIVE_1.0V";
 273                                 regulator-min-microvolt = <1100000>;
 274                                 regulator-max-microvolt = <1100000>;
 275                                 regulator-always-on;
 276                                 regulator-boot-on;
 277                                 op_mode = <1>;
 278                         };
 279
 280                         ldo2_reg: LDO2 {
 281                                 regulator-name = "VDD_28IO_DP_1.35V";
 282                                 regulator-min-microvolt = <1200000>;
 283                                 regulator-max-microvolt = <1200000>;
 284                                 regulator-always-on;
 285                                 regulator-boot-on;
 286                                 op_mode = <1>;
 287                         };
 288
 289                         ldo3_reg: LDO3 {
 290                                 regulator-name = "VDD_COMMON1_1.8V";
 291                                 regulator-min-microvolt = <1800000>;
 292                                 regulator-max-microvolt = <1800000>;
 293                                 regulator-always-on;
 294                                 regulator-boot-on;
 295                                 op_mode = <1>;
 296                         };
 297
 298                         ldo4_reg: LDO4 {
 299                                 regulator-name = "VDD_IOPERI_1.8V";
 300                                 regulator-min-microvolt = <1800000>;
 301                                 regulator-max-microvolt = <1800000>;
 302                                 regulator-always-on;
 303                                 op_mode = <1>;
 304                         };
 305
 306                         ldo5_reg: LDO5 {
 307                                 regulator-name = "VDD_EXT_1.8V";
 308                                 regulator-min-microvolt = <1800000>;
 309                                 regulator-max-microvolt = <1800000>;
 310                                 regulator-always-on;
 311                                 regulator-boot-on;
 312                                 op_mode = <1>;
 313                         };
 314
 315                         ldo6_reg: LDO6 {
 316                                 regulator-name = "VDD_MPLL_1.1V";
 317                                 regulator-min-microvolt = <1100000>;
 318                                 regulator-max-microvolt = <1100000>;
 319                                 regulator-always-on;
 320                                 regulator-boot-on;
 321                                 op_mode = <1>;
 322                         };
 323
 324                         ldo7_reg: LDO7 {
 325                                 regulator-name = "VDD_XPLL_1.1V";
 326                                 regulator-min-microvolt = <1100000>;
 327                                 regulator-max-microvolt = <1100000>;
 328                                 regulator-always-on;
 329                                 regulator-boot-on;
 330                                 op_mode = <1>;
 331                         };
 332
 333                         ldo8_reg: LDO8 {
 334                                 regulator-name = "VDD_COMMON2_1.0V";
 335                                 regulator-min-microvolt = <1000000>;
 336                                 regulator-max-microvolt = <1000000>;
 337                                 regulator-always-on;
 338                                 regulator-boot-on;
 339                                 op_mode = <1>;
 340                         };
 341
 342                         ldo9_reg: LDO9 {
 343                                 regulator-name = "VDD_33ON_3.0V";
 344                                 regulator-min-microvolt = <3000000>;
 345                                 regulator-max-microvolt = <3000000>;
 346                                 op_mode = <1>;
 347                         };
 348
 349                         ldo10_reg: LDO10 {
 350                                 regulator-name = "VDD_COMMON3_1.8V";
 351                                 regulator-min-microvolt = <1800000>;
 352                                 regulator-max-microvolt = <1800000>;
 353                                 regulator-always-on;
 354                                 regulator-boot-on;
 355                                 op_mode = <1>;
 356                         };
 357
 358                         ldo11_reg: LDO11 {
 359                                 regulator-name = "VDD_ABB2_1.8V";
 360                                 regulator-min-microvolt = <1800000>;
 361                                 regulator-max-microvolt = <1800000>;
 362                                 regulator-always-on;
 363                                 regulator-boot-on;
 364                                 op_mode = <1>;
 365                         };
 366
 367                         ldo12_reg: LDO12 {
 368                                 regulator-name = "VDD_USB_3.0V";
 369                                 regulator-min-microvolt = <3000000>;
 370                                 regulator-max-microvolt = <3000000>;
 371                                 regulator-always-on;
 372                                 regulator-boot-on;
 373                                 op_mode = <1>;
 374                         };
 375
 376                         ldo13_reg: LDO13 {
 377                                 regulator-name = "VDDQ_C2C_W_1.8V";
 378                                 regulator-min-microvolt = <1800000>;
 379                                 regulator-max-microvolt = <1800000>;
 380                                 regulator-always-on;
 381                                 regulator-boot-on;
 382                                 op_mode = <1>;
 383                         };
 384
 385                         ldo14_reg: LDO14 {
 386                                 regulator-name = "VDD18_ABB0_3_1.8V";
 387                                 regulator-min-microvolt = <1800000>;
 388                                 regulator-max-microvolt = <1800000>;
 389                                 regulator-always-on;
 390                                 regulator-boot-on;
 391                                 op_mode = <1>;
 392                         };
 393
 394                         ldo15_reg: LDO15 {
 395                                 regulator-name = "VDD10_COMMON4_1.0V";
 396                                 regulator-min-microvolt = <1000000>;
 397                                 regulator-max-microvolt = <1000000>;
 398                                 regulator-always-on;
 399                                 regulator-boot-on;
 400                                 op_mode = <1>;
 401                         };
 402
 403                         ldo16_reg: LDO16 {
 404                                 regulator-name = "VDD18_HSIC_1.8V";
 405                                 regulator-min-microvolt = <1800000>;
 406                                 regulator-max-microvolt = <1800000>;
 407                                 regulator-always-on;
 408                                 regulator-boot-on;
 409                                 op_mode = <1>;
 410                         };
 411
 412                         ldo17_reg: LDO17 {
 413                                 regulator-name = "VDDQ_MMC2_3_2.8V";
 414                                 regulator-min-microvolt = <2800000>;
 415                                 regulator-max-microvolt = <2800000>;
 416                                 regulator-always-on;
 417                                 regulator-boot-on;
 418                                 op_mode = <1>;
 419                         };
 420
 421                         ldo18_reg: LDO18 {
 422                                 regulator-name = "VDD_33ON_2.8V";
 423                                 regulator-min-microvolt = <2800000>;
 424                                 regulator-max-microvolt = <2800000>;
 425                                 op_mode = <1>;
 426                         };
 427
 428                         ldo22_reg: LDO22 {
 429                                 regulator-name = "EXT_33_OFF";
 430                                 regulator-min-microvolt = <3300000>;
 431                                 regulator-max-microvolt = <3300000>;
 432                                 op_mode = <1>;
 433                         };
 434
 435                         ldo23_reg: LDO23 {
 436                                 regulator-name = "EXT_28_OFF";
 437                                 regulator-min-microvolt = <2800000>;
 438                                 regulator-max-microvolt = <2800000>;
 439                                 op_mode = <1>;
 440                         };
 441
 442                         ldo25_reg: LDO25 {
 443                                 regulator-name = "PVDD_LDO25";
 444                                 regulator-min-microvolt = <1200000>;
 445                                 regulator-max-microvolt = <1200000>;
 446                                 op_mode = <1>;
 447                         };
 448
 449                         ldo26_reg: LDO26 {
 450                                 regulator-name = "EXT_18_OFF";
 451                                 regulator-min-microvolt = <1800000>;
 452                                 regulator-max-microvolt = <1800000>;
 453                                 op_mode = <1>;
 454                         };
 455
 456                         buck1_reg: BUCK1 {
 457                                 regulator-name = "vdd_mif";
 458                                 regulator-min-microvolt = <950000>;
 459                                 regulator-max-microvolt = <1200000>;
 460                                 regulator-always-on;
 461                                 regulator-boot-on;
 462                                 op_mode = <1>;
 463                         };
 464
 465                         buck2_reg: BUCK2 {
 466                                 regulator-name = "vdd_arm";
 467                                 regulator-min-microvolt = <912500>;
 468                                 regulator-max-microvolt = <1300000>;
 469                                 regulator-always-on;
 470                                 regulator-boot-on;
 471                                 op_mode = <1>;
 472                         };
 473
 474                         buck3_reg: BUCK3 {
 475                                 regulator-name = "vdd_int";
 476                                 regulator-min-microvolt = <900000>;
 477                                 regulator-max-microvolt = <1200000>;
 478                                 regulator-always-on;
 479                                 regulator-boot-on;
 480                                 op_mode = <1>;
 481                         };
 482
 483                         buck4_reg: BUCK4 {
 484                                 regulator-name = "vdd_g3d";
 485                                 regulator-min-microvolt = <850000>;
 486                                 regulator-max-microvolt = <1300000>;
 487                                 regulator-always-on;
 488                                 regulator-boot-on;
 489                                 op_mode = <1>;
 490                         };
 491
 492                         buck5_reg: BUCK5 {
 493                                 regulator-name = "VDD_MEM_1.35V";
 494                                 regulator-min-microvolt = <750000>;
 495                                 regulator-max-microvolt = <1355000>;
 496                                 regulator-always-on;
 497                                 regulator-boot-on;
 498                                 op_mode = <1>;
 499                         };
 500
 501                         buck7_reg: BUCK7 {
 502                                 regulator-name = "PVDD_BUCK7";
 503                                 regulator-always-on;
 504                                 op_mode = <1>;
 505                         };
 506
 507                         buck8_reg: BUCK8 {
 508                                 regulator-name = "PVDD_BUCK8";
 509                                 regulator-always-on;
 510                                 op_mode = <1>;
 511                         };
 512
 513                         buck9_reg: BUCK9 {
 514                                 regulator-name = "VDD_33_OFF_EXT1";
 515                                 regulator-min-microvolt = <750000>;
 516                                 regulator-max-microvolt = <3000000>;
 517                                 op_mode = <1>;
 518                         };
 519                 };
 520         };
 521 };
 522
 523 &i2c_3 {
 524         status = "okay";
 525
 526         wm1811: codec@1a {
 527                 compatible = "wlf,wm1811";
 528                 reg = <0x1a>;
 529                 clocks = <&i2s0 CLK_I2S_CDCLK>;
 530                 clock-names = "MCLK1";
 531
 532                 AVDD2-supply = <&main_dc_reg>;
 533                 CPVDD-supply = <&main_dc_reg>;
 534                 DBVDD1-supply = <&main_dc_reg>;
 535                 DBVDD2-supply = <&main_dc_reg>;
 536                 DBVDD3-supply = <&main_dc_reg>;
 537                 LDO1VDD-supply = <&main_dc_reg>;
 538                 SPKVDD1-supply = <&main_dc_reg>;
 539                 SPKVDD2-supply = <&main_dc_reg>;
 540
 541                 wlf,ldo1ena = <&gpb0 0 GPIO_ACTIVE_HIGH>;
 542                 wlf,ldo2ena = <&gpb0 1 GPIO_ACTIVE_HIGH>;
 543         };
 544 };
 545
 546 &i2c_8 {
 547         status = "okay";
 548         /* used by HDMI PHY */
 549         samsung,i2c-sda-delay = <100>;
 550         samsung,i2c-max-bus-freq = <66000>;
 551 };
 552
 553 &i2c_9 {
 554         status = "okay";
 555         samsung,i2c-sda-delay = <100>;
 556         samsung,i2c-max-bus-freq = <40000>;
 557         samsung,i2c-slave-addr = <0x38>;
 558
 559         sata_phy_i2c:sata-phy@38 {
 560                 compatible = "samsung,exynos-sataphy-i2c";
 561                 reg = <0x38>;
 562         };
 563 };
 564
 565 &i2s0 {
 566         assigned-clocks = <&i2s0 CLK_I2S_RCLK_SRC>;
 567         assigned-clock-parents = <&clock_audss EXYNOS_I2S_BUS>;
 568         status = "okay";
 569 };
 570
 571 &i2s0_bus {
 572         samsung,pin-drv = <EXYNOS4_PIN_DRV_LV2>;
 573 };
 574
 575 &mali {
 576         mali-supply = <&buck4_reg>;
 577         status = "okay";
 578 };
 579
 580 &mixer {
 581         status = "okay";
 582 };
 583
 584 &mmc_0 {
 585         status = "okay";
 586         broken-cd;
 587         card-detect-delay = <200>;
 588         samsung,dw-mshc-ciu-div = <3>;
 589         samsung,dw-mshc-sdr-timing = <2 3>;
 590         samsung,dw-mshc-ddr-timing = <1 2>;
 591         vmmc-supply = <&mmc_reg>;
 592         pinctrl-names = "default";
 593         pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4 &sd0_bus8>;
 594         bus-width = <8>;
 595         cap-mmc-highspeed;
 596 };
 597
 598 &mmc_2 {
 599         status = "okay";
 600         card-detect-delay = <200>;
 601         samsung,dw-mshc-ciu-div = <3>;
 602         samsung,dw-mshc-sdr-timing = <2 3>;
 603         samsung,dw-mshc-ddr-timing = <1 2>;
 604         vmmc-supply = <&mmc_reg>;
 605         pinctrl-names = "default";
 606         pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_cd &sd2_bus4>;
 607         bus-width = <4>;
 608         disable-wp;
 609         cap-sd-highspeed;
 610 };
 611
 612 &pinctrl_0 {
 613         s5m8767_irq: s5m8767-irq {
 614                 samsung,pins = "gpx3-2";
 615                 samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
 616         };
 617 };
 618
 619 &rtc {
 620         clocks = <&clock CLK_RTC>, <&s5m8767_osc S2MPS11_CLK_AP>;
 621         clock-names = "rtc", "rtc_src";
 622         status = "okay";
 623 };
 624
 625 &sata {
 626         status = "okay";
 627 };
 628
 629 &sata_phy {
 630         status = "okay";
 631         samsung,exynos-sataphy-i2c-phandle = <&sata_phy_i2c>;
 632 };
 633
 634 &soc {
 635         /*
 636          * For unknown reasons HDMI-DDC does not work with Exynos I2C
 637          * controllers. Lets use software I2C over GPIO pins as a workaround.
 638          */
 639         i2c_ddc: i2c-gpio {
 640                 pinctrl-names = "default";
 641                 pinctrl-0 = <&i2c2_gpio_bus>;
 642                 status = "okay";
 643                 compatible = "i2c-gpio";
 644                 gpios = <&gpa0 6 0 /* sda */
 645                          &gpa0 7 0 /* scl */
 646                         >;
 647                 i2c-gpio,delay-us = <2>;
 648                 #address-cells = <1>;
 649                 #size-cells = <0>;
 650         };
 651 };