arch/arm/boot/dts/overlays/spi3-2cs-overlay.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4
   5 / {
   6         compatible = "brcm,bcm2711";
   7
   8         fragment@0 {
   9                 target = <&spi3_cs_pins>;
  10                 frag0: __overlay__ {
  11                         brcm,pins = <0 24>;
  12                         brcm,function = <1>; /* output */
  13                 };
  14         };
  15
  16         fragment@1 {
  17                 target = <&spi3>;
  18                 frag1: __overlay__ {
  19                         /* needed to avoid dtc warning */
  20                         #address-cells = <1>;
  21                         #size-cells = <0>;
  22
  23                         pinctrl-names = "default";
  24                         pinctrl-0 = <&spi3_pins &spi3_cs_pins>;
  25                         cs-gpios = <&gpio 0 1>, <&gpio 24 1>;
  26                         status = "okay";
  27
  28                         spidev3_0: spidev@0 {
  29                                 compatible = "spidev";
  30                                 reg = <0>;      /* CE0 */
  31                                 #address-cells = <1>;
  32                                 #size-cells = <0>;
  33                                 spi-max-frequency = <125000000>;
  34                                 status = "okay";
  35                         };
  36
  37                         spidev3_1: spidev@1 {
  38                                 compatible = "spidev";
  39                                 reg = <1>;      /* CE1 */
  40                                 #address-cells = <1>;
  41                                 #size-cells = <0>;
  42                                 spi-max-frequency = <125000000>;
  43                                 status = "okay";
  44                         };
  45                 };
  46         };
  47
  48         __overrides__ {
  49                 cs0_pin  = <&frag0>,"brcm,pins:0",
  50                            <&frag1>,"cs-gpios:4";
  51                 cs1_pin  = <&frag0>,"brcm,pins:4",
  52                            <&frag1>,"cs-gpios:16";
  53                 cs0_spidev = <&spidev3_0>,"status";
  54                 cs1_spidev = <&spidev3_1>,"status";
  55         };
  56 };