arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4 / {
   5         compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
   6
   7         fragment@0 {
   8                 target = <&gpio>;
   9                 __overlay__ {
  10                         spi1_pins: spi1_pins {
  11                                 brcm,pins = <19 20 21>;
  12                                 brcm,function = <3>; /* alt4 */
  13                         };
  14
  15                         spi1_cs_pins: spi1_cs_pins {
  16                                 brcm,pins = <18>;
  17                                 brcm,function = <1>; /* output */
  18                         };
  19                 };
  20         };
  21
  22         fragment@1 {
  23                 target = <&spi1>;
  24                 frag1: __overlay__ {
  25                         #address-cells = <1>;
  26                         #size-cells = <0>;
  27                         pinctrl-names = "default";
  28                         pinctrl-0 = <&spi1_pins &spi1_cs_pins>;
  29                         cs-gpios = <&gpio 18 1>;
  30                         status = "okay";
  31
  32                         sc16is752: sc16is752@0 {
  33                                 compatible = "nxp,sc16is752";
  34                                 reg = <0>; /* CE0 */
  35                                 clocks = <&sc16is752_clk>;
  36                                 interrupt-parent = <&gpio>;
  37                                 interrupts = <24 2>; /* IRQ_TYPE_EDGE_FALLING */
  38                                 #gpio-controller;
  39                                 #gpio-cells = <2>;
  40                                 spi-max-frequency = <4000000>;
  41
  42                                 sc16is752_clk: sc16is752_clk {
  43                                         compatible = "fixed-clock";
  44                                         #clock-cells = <0>;
  45                                         clock-frequency = <14745600>;
  46                                 };
  47                         };
  48                 };
  49         };
  50
  51         fragment@2 {
  52                 target = <&aux>;
  53                 __overlay__ {
  54                         status = "okay";
  55                 };
  56         };
  57
  58     __overrides__ {
  59       int_pin = <&sc16is752>,"interrupts:0";
  60     };
  61 };