arch/arm/boot/dts/rk3288-veyron-sdmmc.dtsi

   1 /*
   2  * Google Veyron (and derivatives) fragment for sdmmc cards
   3  *
   4  * Copyright 2015 Google, Inc
   5  *
   6  * This file is dual-licensed: you can use it either under the terms
   7  * of the GPL or the X11 license, at your option. Note that this dual
   8  * licensing only applies to this file, and not this project as a
   9  * whole.
  10  *
  11  *  a) This file is free software; you can redistribute it and/or
  12  *     modify it under the terms of the GNU General Public License as
  13  *     published by the Free Software Foundation; either version 2 of the
  14  *     License, or (at your option) any later version.
  15  *
  16  *     This file is distributed in the hope that it will be useful,
  17  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *     GNU General Public License for more details.
  20  *
  21  *  Or, alternatively,
  22  *
  23  *  b) Permission is hereby granted, free of charge, to any person
  24  *     obtaining a copy of this software and associated documentation
  25  *     files (the "Software"), to deal in the Software without
  26  *     restriction, including without limitation the rights to use,
  27  *     copy, modify, merge, publish, distribute, sublicense, and/or
  28  *     sell copies of the Software, and to permit persons to whom the
  29  *     Software is furnished to do so, subject to the following
  30  *     conditions:
  31  *
  32  *     The above copyright notice and this permission notice shall be
  33  *     included in all copies or substantial portions of the Software.
  34  *
  35  *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  36  *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  37  *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  38  *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  39  *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  40  *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  41  *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  42  *     OTHER DEALINGS IN THE SOFTWARE.
  43  */
  44
  45 &io_domains {
  46         sdcard-supply = <&vccio_sd>;
  47 };
  48
  49 &pinctrl {
  50         sdmmc {
  51                 /*
  52                  * We run sdmmc at max speed; bump up drive strength.
  53                  * We also have external pulls, so disable the internal ones.
  54                  */
  55                 sdmmc_bus4: sdmmc-bus4 {
  56                         rockchip,pins = <6 16 RK_FUNC_1 &pcfg_pull_none_drv_8ma>,
  57                                         <6 17 RK_FUNC_1 &pcfg_pull_none_drv_8ma>,
  58                                         <6 18 RK_FUNC_1 &pcfg_pull_none_drv_8ma>,
  59                                         <6 19 RK_FUNC_1 &pcfg_pull_none_drv_8ma>;
  60                 };
  61
  62                 sdmmc_clk: sdmmc-clk {
  63                         rockchip,pins = <6 20 RK_FUNC_1 &pcfg_pull_none_drv_8ma>;
  64                 };
  65
  66                 sdmmc_cmd: sdmmc-cmd {
  67                         rockchip,pins = <6 21 RK_FUNC_1 &pcfg_pull_none_drv_8ma>;
  68                 };
  69
  70                 /*
  71                  * Builtin CD line is hooked to ground to prevent JTAG at boot
  72                  * (and also to get the voltage rail correct).
  73                  * Configure gpio6_C6 as GPIO so dw_mmc builtin CD doesn't
  74                  * think there's a card inserted
  75                  */
  76                 sdmmc_cd_disabled: sdmmc-cd-disabled {
  77                         rockchip,pins = <6 22 RK_FUNC_GPIO &pcfg_pull_none>;
  78                 };
  79
  80                 /* This is where we actually hook up CD */
  81                 sdmmc_cd_gpio: sdmmc-cd-gpio {
  82                         rockchip,pins = <7 5 RK_FUNC_GPIO &pcfg_pull_none>;
  83                 };
  84         };
  85 };
  86
  87 &rk808 {
  88         vcc9-supply = <&vcc_5v>;
  89
  90         regulators {
  91                 vccio_sd: LDO_REG4 {
  92                         regulator-name = "vccio_sd";
  93                         regulator-min-microvolt = <1800000>;
  94                         regulator-max-microvolt = <3300000>;
  95                         regulator-state-mem {
  96                                 regulator-off-in-suspend;
  97                         };
  98                 };
  99
 100                 vcc33_sd: LDO_REG5 {
 101                         regulator-name = "vcc33_sd";
 102                         regulator-min-microvolt = <3300000>;
 103                         regulator-max-microvolt = <3300000>;
 104                         regulator-state-mem {
 105                                 regulator-off-in-suspend;
 106                         };
 107                 };
 108         };
 109 };
 110
 111 &sdmmc {
 112         status = "okay";
 113
 114         bus-width = <4>;
 115         cap-mmc-highspeed;
 116         cap-sd-highspeed;
 117         card-detect-delay = <200>;
 118         cd-gpios = <&gpio7 RK_PA5 GPIO_ACTIVE_LOW>;
 119         rockchip,default-sample-phase = <90>;
 120         sd-uhs-sdr12;
 121         sd-uhs-sdr25;
 122         sd-uhs-sdr50;
 123         sd-uhs-sdr104;
 124         vmmc-supply = <&vcc33_sd>;
 125         vqmmc-supply = <&vccio_sd>;
 126 };