arch/arm/boot/dts/overlays/spi2-3cs-overlay.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4
   5 / {
   6         compatible = "brcm,bcm2835";
   7
   8         fragment@0 {
   9                 target = <&gpio>;
  10                 __overlay__ {
  11                         spi2_pins: spi2_pins {
  12                                 brcm,pins = <40 41 42>;
  13                                 brcm,function = <3>; /* alt4 */
  14                         };
  15
  16                         spi2_cs_pins: spi2_cs_pins {
  17                                 brcm,pins = <43 44 45>;
  18                                 brcm,function = <1>; /* output */
  19                         };
  20                 };
  21         };
  22
  23         fragment@1 {
  24                 target = <&spi2>;
  25                 frag1: __overlay__ {
  26                         /* needed to avoid dtc warning */
  27                         #address-cells = <1>;
  28                         #size-cells = <0>;
  29                         pinctrl-names = "default";
  30                         pinctrl-0 = <&spi2_pins &spi2_cs_pins>;
  31                         cs-gpios = <&gpio 43 1>, <&gpio 44 1>, <&gpio 45 1>;
  32                         status = "okay";
  33
  34                         spidev2_0: spidev@0 {
  35                                 compatible = "spidev";
  36                                 reg = <0>;      /* CE0 */
  37                                 #address-cells = <1>;
  38                                 #size-cells = <0>;
  39                                 spi-max-frequency = <125000000>;
  40                                 status = "okay";
  41                         };
  42
  43                         spidev2_1: spidev@1 {
  44                                 compatible = "spidev";
  45                                 reg = <1>;      /* CE1 */
  46                                 #address-cells = <1>;
  47                                 #size-cells = <0>;
  48                                 spi-max-frequency = <125000000>;
  49                                 status = "okay";
  50                         };
  51
  52                         spidev2_2: spidev@2 {
  53                                 compatible = "spidev";
  54                                 reg = <2>;      /* CE2 */
  55                                 #address-cells = <1>;
  56                                 #size-cells = <0>;
  57                                 spi-max-frequency = <125000000>;
  58                                 status = "okay";
  59                         };
  60                 };
  61         };
  62
  63         fragment@2 {
  64                 target = <&aux>;
  65                 __overlay__ {
  66                         status = "okay";
  67                 };
  68         };
  69
  70         __overrides__ {
  71                 cs0_pin  = <&spi2_cs_pins>,"brcm,pins:0",
  72                            <&frag1>,"cs-gpios:4";
  73                 cs1_pin  = <&spi2_cs_pins>,"brcm,pins:4",
  74                            <&frag1>,"cs-gpios:16";
  75                 cs2_pin  = <&spi2_cs_pins>,"brcm,pins:8",
  76                            <&frag1>,"cs-gpios:28";
  77                 cs0_spidev = <&spidev2_0>,"status";
  78                 cs1_spidev = <&spidev2_1>,"status";
  79                 cs2_spidev = <&spidev2_2>,"status";
  80         };
  81 };