arch/arm/boot/dts/overlays/sdio-overlay.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4 /* Enable SDIO from MMC interface via various GPIO groups */
   5
   6 /{
   7         compatible = "brcm,bcm2835";
   8
   9         fragment@0 {
  10                 target = <&mmcnr>;
  11                 __overlay__ {
  12                         status = "disabled";
  13                 };
  14         };
  15
  16         fragment@1 {
  17                 target = <&mmc>;
  18                 sdio_ovl: __overlay__ {
  19                         pinctrl-0 = <&sdio_ovl_pins>;
  20                         pinctrl-names = "default";
  21                         non-removable;
  22                         bus-width = <4>;
  23                         status = "okay";
  24                 };
  25         };
  26
  27         fragment@2 {
  28                 target = <&gpio>;
  29                 __overlay__ {
  30                         sdio_ovl_pins: sdio_ovl_pins {
  31                                 brcm,pins = <22 23 24 25 26 27>;
  32                                 brcm,function = <7>; /* ALT3 = SD1 */
  33                                 brcm,pull = <0 2 2 2 2 2>;
  34                         };
  35                 };
  36         };
  37
  38         fragment@3 {
  39                 target = <&sdio_ovl_pins>;
  40                 __dormant__ {
  41                         brcm,pins = <22 23 24 25>;
  42                         brcm,pull = <0 2 2 2>;
  43                 };
  44         };
  45
  46         fragment@4 {
  47                 target = <&sdio_ovl_pins>;
  48                 __dormant__ {
  49                         brcm,pins = <34 35 36 37>;
  50                         brcm,pull = <0 2 2 2>;
  51                 };
  52         };
  53
  54         fragment@5 {
  55                 target = <&sdio_ovl_pins>;
  56                 __dormant__ {
  57                         brcm,pins = <34 35 36 37 38 39>;
  58                         brcm,pull = <0 2 2 2 2 2>;
  59                 };
  60         };
  61
  62         fragment@6 {
  63                 target-path = "/aliases";
  64                 __overlay__ {
  65                         mmc1 = "/soc/mmc@7e300000";
  66                 };
  67         };
  68
  69         __overrides__ {
  70                 poll_once = <&sdio_ovl>,"non-removable?";
  71                 bus_width = <&sdio_ovl>,"bus-width:0";
  72                 sdio_overclock = <&sdio_ovl>,"brcm,overclock-50:0";
  73                 gpios_22_25 = <0>,"=3";
  74                 gpios_34_37 = <0>,"=4";
  75                 gpios_34_39 = <0>,"=5";
  76         };
  77 };