arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi

   1 /*
   2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include "msm8916.dtsi"
  15 #include "pm8916.dtsi"
  16 #include "apq8016-sbc-soc-pins.dtsi"
  17 #include "apq8016-sbc-pmic-pins.dtsi"
  18 #include <dt-bindings/gpio/gpio.h>
  19 #include <dt-bindings/input/input.h>
  20 #include <dt-bindings/sound/apq8016-lpass.h>
  21
  22 /*
  23  * GPIO name legend: proper name = the GPIO line is used as GPIO
  24  *         NC = not connected (pin out but not routed from the chip to
  25  *              anything the board)
  26  *         "[PER]" = pin is muxed for [peripheral] (not GPIO)
  27  *         LSEC = Low Speed External Connector
  28  *         HSEC = High Speed External Connector
  29  *
  30  * Line names are taken from the schematic "DragonBoard410c"
  31  * dated monday, august 31, 2015. Page 5 in particular.
  32  *
  33  * For the lines routed to the external connectors the
  34  * lines are named after the 96Boards CE Specification 1.0,
  35  * Appendix "Expansion Connector Signal Description".
  36  *
  37  * When the 96Board naming of a line and the schematic name of
  38  * the same line are in conflict, the 96Board specification
  39  * takes precedence, which means that the external UART on the
  40  * LSEC is named UART0 while the schematic and SoC names this
  41  * UART3. This is only for the informational lines i.e. "[FOO]",
  42  * the GPIO named lines "GPIO-A" thru "GPIO-L" are the only
  43  * ones actually used for GPIO.
  44  */
  45
  46 / {
  47         aliases {
  48                 serial0 = &blsp1_uart2;
  49                 serial1 = &blsp1_uart1;
  50                 usid0 = &pm8916_0;
  51                 i2c0    = &blsp_i2c2;
  52                 i2c1    = &blsp_i2c6;
  53                 i2c3    = &blsp_i2c4;
  54                 spi0    = &blsp_spi5;
  55                 spi1    = &blsp_spi3;
  56         };
  57
  58         chosen {
  59                 stdout-path = "serial0";
  60         };
  61
  62         reserved-memory {
  63                 ramoops@bff00000{
  64                         compatible = "ramoops";
  65                         reg = <0x0 0xbff00000 0x0 0x100000>;
  66
  67                         record-size = <0x20000>;
  68                         console-size = <0x20000>;
  69                         ftrace-size = <0x20000>;
  70                 };
  71         };
  72
  73         soc {
  74                 pinctrl@1000000 {
  75                         gpio-line-names =
  76                                 "[UART0_TX]", /* GPIO_0, LSEC pin 5 */
  77                                 "[UART0_RX]", /* GPIO_1, LSEC pin 7 */
  78                                 "[UART0_CTS_N]", /* GPIO_2, LSEC pin 3 */
  79                                 "[UART0_RTS_N]", /* GPIO_3, LSEC pin 9 */
  80                                 "[UART1_TX]", /* GPIO_4, LSEC pin 11 */
  81                                 "[UART1_RX]", /* GPIO_5, LSEC pin 13 */
  82                                 "[I2C0_SDA]", /* GPIO_8, LSEC pin 17 */
  83                                 "[I2C0_SCL]", /* GPIO_7, LSEC pin 15 */
  84                                 "[SPI1_DOUT]", /* SPI1_MOSI, HSEC pin 1 */
  85                                 "[SPI1_DIN]", /* SPI1_MISO, HSEC pin 11 */
  86                                 "[SPI1_CS]", /* SPI1_CS_N, HSEC pin 7 */
  87                                 "[SPI1_SCLK]", /* SPI1_CLK, HSEC pin 9 */
  88                                 "GPIO-B", /* LS_EXP_GPIO_B, LSEC pin 24 */
  89                                 "GPIO-C", /* LS_EXP_GPIO_C, LSEC pin 25 */
  90                                 "[I2C3_SDA]", /* HSEC pin 38 */
  91                                 "[I2C3_SCL]", /* HSEC pin 36 */
  92                                 "[SPI0_MOSI]", /* LSEC pin 14 */
  93                                 "[SPI0_MISO]", /* LSEC pin 10 */
  94                                 "[SPI0_CS_N]", /* LSEC pin 12 */
  95                                 "[SPI0_CLK]", /* LSEC pin 8 */
  96                                 "HDMI_HPD_N", /* GPIO 20 */
  97                                 "USR_LED_1_CTRL",
  98                                 "[I2C1_SDA]", /* GPIO_22, LSEC pin 21 */
  99                                 "[I2C1_SCL]", /* GPIO_23, LSEC pin 19 */
 100                                 "GPIO-G", /* LS_EXP_GPIO_G, LSEC pin 29 */
 101                                 "GPIO-H", /* LS_EXP_GPIO_H, LSEC pin 30 */
 102                                 "[CSI0_MCLK]", /* HSEC pin 15 */
 103                                 "[CSI1_MCLK]", /* HSEC pin 17 */
 104                                 "GPIO-K", /* LS_EXP_GPIO_K, LSEC pin 33 */
 105                                 "[I2C2_SDA]", /* HSEC pin 34 */
 106                                 "[I2C2_SCL]", /* HSEC pin 32 */
 107                                 "DSI2HDMI_INT_N",
 108                                 "DSI_SW_SEL_APQ",
 109                                 "GPIO-L", /* LS_EXP_GPIO_L, LSEC pin 34 */
 110                                 "GPIO-J", /* LS_EXP_GPIO_J, LSEC pin 32 */
 111                                 "GPIO-I", /* LS_EXP_GPIO_I, LSEC pin 31 */
 112                                 "GPIO-A", /* LS_EXP_GPIO_A, LSEC pin 23 */
 113                                 "FORCED_USB_BOOT",
 114                                 "SD_CARD_DET_N",
 115                                 "[WCSS_BT_SSBI]",
 116                                 "[WCSS_WLAN_DATA_2]", /* GPIO 40 */
 117                                 "[WCSS_WLAN_DATA_1]",
 118                                 "[WCSS_WLAN_DATA_0]",
 119                                 "[WCSS_WLAN_SET]",
 120                                 "[WCSS_WLAN_CLK]",
 121                                 "[WCSS_FM_SSBI]",
 122                                 "[WCSS_FM_SDI]",
 123                                 "[WCSS_BT_DAT_CTL]",
 124                                 "[WCSS_BT_DAT_STB]",
 125                                 "NC",
 126                                 "NC", /* GPIO 50 */
 127                                 "NC",
 128                                 "NC",
 129                                 "NC",
 130                                 "NC",
 131                                 "NC",
 132                                 "NC",
 133                                 "NC",
 134                                 "NC",
 135                                 "NC",
 136                                 "NC", /* GPIO 60 */
 137                                 "NC",
 138                                 "NC",
 139                                 "[CDC_PDM0_CLK]",
 140                                 "[CDC_PDM0_SYNC]",
 141                                 "[CDC_PDM0_TX0]",
 142                                 "[CDC_PDM0_RX0]",
 143                                 "[CDC_PDM0_RX1]",
 144                                 "[CDC_PDM0_RX2]",
 145                                 "GPIO-D", /* LS_EXP_GPIO_D, LSEC pin 26 */
 146                                 "NC", /* GPIO 70 */
 147                                 "NC",
 148                                 "NC",
 149                                 "NC",
 150                                 "NC", /* GPIO 74 */
 151                                 "NC",
 152                                 "NC",
 153                                 "NC",
 154                                 "NC",
 155                                 "NC",
 156                                 "BOOT_CONFIG_0", /* GPIO 80 */
 157                                 "BOOT_CONFIG_1",
 158                                 "BOOT_CONFIG_2",
 159                                 "BOOT_CONFIG_3",
 160                                 "NC",
 161                                 "NC",
 162                                 "BOOT_CONFIG_5",
 163                                 "NC",
 164                                 "NC",
 165                                 "NC",
 166                                 "NC", /* GPIO 90 */
 167                                 "NC",
 168                                 "NC",
 169                                 "NC",
 170                                 "NC",
 171                                 "NC",
 172                                 "NC",
 173                                 "NC",
 174                                 "NC",
 175                                 "NC",
 176                                 "NC", /* GPIO 100 */
 177                                 "NC",
 178                                 "NC",
 179                                 "NC",
 180                                 "SSBI_GPS",
 181                                 "NC",
 182                                 "NC",
 183                                 "KEY_VOLP_N",
 184                                 "NC",
 185                                 "NC",
 186                                 "[LS_EXP_MI2S_WS]", /* GPIO 110 */
 187                                 "NC",
 188                                 "NC",
 189                                 "[LS_EXP_MI2S_SCK]",
 190                                 "[LS_EXP_MI2S_DATA0]",
 191                                 "GPIO-E", /* LS_EXP_GPIO_E, LSEC pin 27 */
 192                                 "NC",
 193                                 "[DSI2HDMI_MI2S_WS]",
 194                                 "[DSI2HDMI_MI2S_SCK]",
 195                                 "[DSI2HDMI_MI2S_DATA0]",
 196                                 "USR_LED_2_CTRL", /* GPIO 120 */
 197                                 "SB_HS_ID";
 198                 };
 199
 200                 dma@7884000 {
 201                         status = "okay";
 202                 };
 203
 204                 serial@78af000 {
 205                         label = "LS-UART0";
 206                         status = "okay";
 207                         pinctrl-names = "default", "sleep";
 208                         pinctrl-0 = <&blsp1_uart1_default>;
 209                         pinctrl-1 = <&blsp1_uart1_sleep>;
 210                 };
 211
 212                 serial@78b0000 {
 213                         label = "LS-UART1";
 214                         status = "okay";
 215                         pinctrl-names = "default", "sleep";
 216                         pinctrl-0 = <&blsp1_uart2_default>;
 217                         pinctrl-1 = <&blsp1_uart2_sleep>;
 218                 };
 219
 220                 i2c@78b6000 {
 221                 /* On Low speed expansion */
 222                         label = "LS-I2C0";
 223                         status = "okay";
 224                 };
 225
 226                 i2c@78b8000 {
 227                 /* On High speed expansion */
 228                         label = "HS-I2C2";
 229                         status = "okay";
 230
 231                         adv_bridge: bridge@39 {
 232                                 status = "okay";
 233
 234                                 compatible = "adi,adv7533";
 235                                 reg = <0x39>;
 236
 237                                 interrupt-parent = <&msmgpio>;
 238                                 interrupts = <31 2>;
 239
 240                                 adi,dsi-lanes = <4>;
 241                                 clocks = <&rpmcc RPM_SMD_BB_CLK2>;
 242                                 clock-names = "cec";
 243
 244                                 pd-gpios = <&msmgpio 32 0>;
 245
 246                                 avdd-supply = <&pm8916_l6>;
 247                                 v1p2-supply = <&pm8916_l6>;
 248                                 v3p3-supply = <&pm8916_l17>;
 249
 250                                 pinctrl-names = "default","sleep";
 251                                 pinctrl-0 = <&adv7533_int_active &adv7533_switch_active>;
 252                                 pinctrl-1 = <&adv7533_int_suspend &adv7533_switch_suspend>;
 253                                 #sound-dai-cells = <1>;
 254
 255                                 ports {
 256                                         #address-cells = <1>;
 257                                         #size-cells = <0>;
 258
 259                                         port@0 {
 260                                                 reg = <0>;
 261                                                 adv7533_in: endpoint {
 262                                                         remote-endpoint = <&dsi0_out>;
 263                                                 };
 264                                         };
 265
 266                                         port@1 {
 267                                                 reg = <1>;
 268                                                 adv7533_out: endpoint {
 269                                                         remote-endpoint = <&hdmi_con>;
 270                                                 };
 271                                         };
 272                                 };
 273                         };
 274                 };
 275
 276                 i2c@78ba000 {
 277                 /* On Low speed expansion */
 278                         label = "LS-I2C1";
 279                         status = "okay";
 280                 };
 281
 282                 spi@78b7000 {
 283                 /* On High speed expansion */
 284                         label = "HS-SPI1";
 285                         status = "okay";
 286                 };
 287
 288                 spi@78b9000 {
 289                 /* On Low speed expansion */
 290                         label = "LS-SPI0";
 291                         status = "okay";
 292                 };
 293
 294                 leds {
 295                         pinctrl-names = "default";
 296                         pinctrl-0 = <&msmgpio_leds>,
 297                                     <&pm8916_gpios_leds>,
 298                                     <&pm8916_mpps_leds>;
 299
 300                         compatible = "gpio-leds";
 301
 302                         led@1 {
 303                                 label = "apq8016-sbc:green:user1";
 304                                 gpios = <&msmgpio 21 GPIO_ACTIVE_HIGH>;
 305                                 linux,default-trigger = "heartbeat";
 306                                 default-state = "off";
 307                         };
 308
 309                         led@2 {
 310                                 label = "apq8016-sbc:green:user2";
 311                                 gpios = <&msmgpio 120 GPIO_ACTIVE_HIGH>;
 312                                 linux,default-trigger = "mmc0";
 313                                 default-state = "off";
 314                         };
 315
 316                         led@3 {
 317                                 label = "apq8016-sbc:green:user3";
 318                                 gpios = <&pm8916_gpios 1 GPIO_ACTIVE_HIGH>;
 319                                 linux,default-trigger = "mmc1";
 320                                 default-state = "off";
 321                         };
 322
 323                         led@4 {
 324                                 label = "apq8016-sbc:green:user4";
 325                                 gpios = <&pm8916_gpios 2 GPIO_ACTIVE_HIGH>;
 326                                 linux,default-trigger = "none";
 327                                 default-state = "off";
 328                         };
 329
 330                         led@5 {
 331                                 label = "apq8016-sbc:yellow:wlan";
 332                                 gpios = <&pm8916_mpps 2 GPIO_ACTIVE_HIGH>;
 333                                 linux,default-trigger = "phy0tx";
 334                                 default-state = "off";
 335                         };
 336
 337                         led@6 {
 338                                 label = "apq8016-sbc:blue:bt";
 339                                 gpios = <&pm8916_mpps 3 GPIO_ACTIVE_HIGH>;
 340                                 linux,default-trigger = "bt";
 341                                 default-state = "off";
 342                         };
 343                 };
 344
 345                 sdhci@7824000 {
 346                         vmmc-supply = <&pm8916_l8>;
 347                         vqmmc-supply = <&pm8916_l5>;
 348
 349                         pinctrl-names = "default", "sleep";
 350                         pinctrl-0 = <&sdc1_clk_on &sdc1_cmd_on &sdc1_data_on>;
 351                         pinctrl-1 = <&sdc1_clk_off &sdc1_cmd_off &sdc1_data_off>;
 352                         status = "okay";
 353                 };
 354
 355                 sdhci@7864000 {
 356                         vmmc-supply = <&pm8916_l11>;
 357                         vqmmc-supply = <&pm8916_l12>;
 358
 359                         pinctrl-names = "default", "sleep";
 360                         pinctrl-0 = <&sdc2_clk_on &sdc2_cmd_on &sdc2_data_on &sdc2_cd_on>;
 361                         pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off &sdc2_cd_off>;
 362
 363                         cd-gpios = <&msmgpio 38 0x1>;
 364                         status = "okay";
 365                 };
 366
 367                 usb@78d9000 {
 368                         extcon = <&usb_id>;
 369                         status = "okay";
 370                         adp-disable;
 371                         hnp-disable;
 372                         srp-disable;
 373                         dr_mode = "host";
 374                         pinctrl-names = "default";
 375                         pinctrl-0 = <&usb_sw_sel_pm>;
 376                         ulpi {
 377                                 phy {
 378                                         v1p8-supply = <&pm8916_l7>;
 379                                         v3p3-supply = <&pm8916_l13>;
 380                                         extcon = <&usb_id>;
 381                                 };
 382                         };
 383                 };
 384
 385                 lpass@7708000 {
 386                         status = "okay";
 387                 };
 388
 389                 mdss@1a00000 {
 390                         status = "okay";
 391
 392                         mdp@1a01000 {
 393                                 status = "okay";
 394                         };
 395
 396                         dsi@1a98000 {
 397                                 status = "okay";
 398
 399                                 vdda-supply = <&pm8916_l2>;
 400                                 vddio-supply = <&pm8916_l6>;
 401
 402                                 ports {
 403                                         port@1 {
 404                                                 endpoint {
 405                                                         remote-endpoint = <&adv7533_in>;
 406                                                         data-lanes = <0 1 2 3>;
 407                                                 };
 408                                         };
 409                                 };
 410                         };
 411
 412                         dsi-phy@1a98300 {
 413                                 status = "okay";
 414
 415                                 vddio-supply = <&pm8916_l6>;
 416                         };
 417                 };
 418
 419                 lpass_codec: codec{
 420                         status = "okay";
 421                 };
 422
 423                 /*
 424                 Internal Codec
 425                         playback - Primary MI2S
 426                         capture - Ter MI2S
 427
 428                 External Primary:
 429                         playback - secondary MI2S
 430                         capture - Quat MI2S
 431
 432                 External Secondary:
 433                         playback - Quat MI2S
 434                         capture - Quat MI2S
 435
 436                 */
 437
 438                 sound: sound {
 439                         compatible = "qcom,apq8016-sbc-sndcard";
 440                         reg = <0x07702000 0x4>, <0x07702004 0x4>;
 441                         reg-names = "mic-iomux", "spkr-iomux";
 442
 443                         status = "okay";
 444                         pinctrl-0 = <&cdc_pdm_lines_act &ext_sec_tlmm_lines_act &ext_mclk_tlmm_lines_act>;
 445                         pinctrl-1 = <&cdc_pdm_lines_sus &ext_sec_tlmm_lines_sus &ext_mclk_tlmm_lines_sus>;
 446                         pinctrl-names = "default", "sleep";
 447                         qcom,model = "DB410c";
 448                         qcom,audio-routing =
 449                                 "AMIC2", "MIC BIAS Internal2",
 450                                 "AMIC3", "MIC BIAS External1";
 451                         external-dai-link@0 {
 452                                 link-name = "ADV7533";
 453                                 cpu { /* QUAT */
 454                                         sound-dai = <&lpass MI2S_QUATERNARY>;
 455                                 };
 456                                 codec {
 457                                         sound-dai = <&adv_bridge 0>;
 458                                 };
 459                         };
 460
 461                         internal-codec-playback-dai-link@0 {            /* I2S - Internal codec */
 462                                 link-name = "WCD";
 463                                 cpu { /* PRIMARY */
 464                                         sound-dai = <&lpass MI2S_PRIMARY>;
 465                                 };
 466                                 codec {
 467                                         sound-dai = <&lpass_codec 0>, <&wcd_codec 0>;
 468                                 };
 469                         };
 470
 471                         internal-codec-capture-dai-link@0 {             /* I2S - Internal codec */
 472                                 link-name = "WCD-Capture";
 473                                 cpu { /* PRIMARY */
 474                                         sound-dai = <&lpass MI2S_TERTIARY>;
 475                                 };
 476                                 codec {
 477                                         sound-dai = <&lpass_codec 1>, <&wcd_codec 1>;
 478                                 };
 479                         };
 480                 };
 481
 482                 spmi@200f000 {
 483                         pm8916@0 {
 484                                 gpios@c000 {
 485                                         gpio-line-names =
 486                                                 "USR_LED_3_CTRL",
 487                                                 "USR_LED_4_CTRL",
 488                                                 "USB_HUB_RESET_N_PM",
 489                                                 "USB_SW_SEL_PM";
 490                                 };
 491                                 mpps@a000 {
 492                                         gpio-line-names =
 493                                                 "VDD_PX_BIAS",
 494                                                 "WLAN_LED_CTRL",
 495                                                 "BT_LED_CTRL",
 496                                                 "GPIO-F"; /* LS_EXP_GPIO_F, LSEC pin 28 */
 497                                 };
 498                         };
 499                 };
 500
 501                 wcnss@a21b000 {
 502                         status = "okay";
 503                 };
 504         };
 505
 506         usb2513 {
 507                 compatible = "smsc,usb3503";
 508                 reset-gpios = <&pm8916_gpios 3 GPIO_ACTIVE_LOW>;
 509                 initial-mode = <1>;
 510         };
 511
 512         usb_id: usb-id {
 513                 compatible = "linux,extcon-usb-gpio";
 514                 vbus-gpio = <&msmgpio 121 GPIO_ACTIVE_HIGH>;
 515                 pinctrl-names = "default";
 516                 pinctrl-0 = <&usb_id_default>;
 517         };
 518
 519         hdmi-out {
 520                 compatible = "hdmi-connector";
 521                 type = "a";
 522
 523                 port {
 524                         hdmi_con: endpoint {
 525                                 remote-endpoint = <&adv7533_out>;
 526                         };
 527                 };
 528         };
 529
 530         gpio_keys {
 531                 compatible = "gpio-keys";
 532                 #address-cells = <1>;
 533                 #size-cells = <0>;
 534                 autorepeat;
 535
 536                 pinctrl-names = "default";
 537                 pinctrl-0 = <&msm_key_volp_n_default>;
 538
 539                 button@0 {
 540                         label = "Volume Up";
 541                         linux,code = <KEY_VOLUMEUP>;
 542                         gpios = <&msmgpio 107 GPIO_ACTIVE_LOW>;
 543                 };
 544         };
 545 };
 546
 547 &wcd_codec {
 548         status = "okay";
 549         clocks = <&gcc GCC_CODEC_DIGCODEC_CLK>;
 550         clock-names = "mclk";
 551         qcom,mbhc-vthreshold-low = <75 150 237 450 500>;
 552         qcom,mbhc-vthreshold-high = <75 150 237 450 500>;
 553 };
 554
 555 &smd_rpm_regulators {
 556         vdd_l1_l2_l3-supply = <&pm8916_s3>;
 557         vdd_l5-supply = <&pm8916_s3>;
 558         vdd_l4_l5_l6-supply = <&pm8916_s4>;
 559         vdd_l7-supply = <&pm8916_s4>;
 560
 561         s1 {
 562                 regulator-min-microvolt = <375000>;
 563                 regulator-max-microvolt = <1562000>;
 564         };
 565
 566         s3 {
 567                 regulator-min-microvolt = <375000>;
 568                 regulator-max-microvolt = <1562000>;
 569         };
 570
 571         s4 {
 572                 regulator-min-microvolt = <1800000>;
 573                 regulator-max-microvolt = <1800000>;
 574
 575                 regulator-always-on;
 576                 regulator-boot-on;
 577         };
 578
 579         l1 {
 580                 regulator-min-microvolt = <375000>;
 581                 regulator-max-microvolt = <1525000>;
 582         };
 583
 584         l2 {
 585                 regulator-min-microvolt = <1200000>;
 586                 regulator-max-microvolt = <1200000>;
 587         };
 588
 589         l3 {
 590                 regulator-min-microvolt = <375000>;
 591                 regulator-max-microvolt = <1525000>;
 592         };
 593
 594         l4 {
 595                 regulator-min-microvolt = <1750000>;
 596                 regulator-max-microvolt = <3337000>;
 597         };
 598
 599         l5 {
 600                 regulator-min-microvolt = <1750000>;
 601                 regulator-max-microvolt = <3337000>;
 602         };
 603
 604         l6 {
 605                 regulator-min-microvolt = <1800000>;
 606                 regulator-max-microvolt = <1800000>;
 607         };
 608
 609         l7 {
 610                 regulator-min-microvolt = <1750000>;
 611                 regulator-max-microvolt = <3337000>;
 612         };
 613
 614         l8 {
 615                 regulator-min-microvolt = <1750000>;
 616                 regulator-max-microvolt = <3337000>;
 617         };
 618
 619         l9 {
 620                 regulator-min-microvolt = <1750000>;
 621                 regulator-max-microvolt = <3337000>;
 622         };
 623
 624         l10 {
 625                 regulator-min-microvolt = <1750000>;
 626                 regulator-max-microvolt = <3337000>;
 627         };
 628
 629         l11 {
 630                 regulator-min-microvolt = <1750000>;
 631                 regulator-max-microvolt = <3337000>;
 632         };
 633
 634         l12 {
 635                 regulator-min-microvolt = <1750000>;
 636                 regulator-max-microvolt = <3337000>;
 637         };
 638
 639         l13 {
 640                 regulator-min-microvolt = <1750000>;
 641                 regulator-max-microvolt = <3337000>;
 642         };
 643
 644         l14 {
 645                 regulator-min-microvolt = <1750000>;
 646                 regulator-max-microvolt = <3337000>;
 647         };
 648
 649         /**
 650          * 1.8v required on LS expansion
 651          * for mezzanine boards
 652          */
 653         l15 {
 654                 regulator-min-microvolt = <1750000>;
 655                 regulator-max-microvolt = <3337000>;
 656                 regulator-always-on;
 657         };
 658
 659         l16 {
 660                 regulator-min-microvolt = <1750000>;
 661                 regulator-max-microvolt = <3337000>;
 662         };
 663
 664         l17 {
 665                 regulator-min-microvolt = <3300000>;
 666                 regulator-max-microvolt = <3300000>;
 667         };
 668
 669         l18 {
 670                 regulator-min-microvolt = <1750000>;
 671                 regulator-max-microvolt = <3337000>;
 672         };
 673 };