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

   1 /dts-v1/;
   2 /plugin/;
   3
   4 / {
   5         compatible = "brcm,bcm2835";
   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                 __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                 };
  43         };
  44
  45         fragment@2 {
  46                 target = <&aux>;
  47                 __overlay__ {
  48                         status = "okay";
  49                 };
  50         };
  51
  52         fragment@3 {
  53                 target-path = "/";
  54                 __overlay__ {
  55                         sc16is752_clk: sc16is752_spi1_0_clk {
  56                                 compatible = "fixed-clock";
  57                                 #clock-cells = <0>;
  58                                 clock-frequency = <14745600>;
  59                         };
  60                 };
  61         };
  62
  63         __overrides__ {
  64                 int_pin = <&sc16is752>,"interrupts:0";
  65                 xtal = <&sc16is752_clk>,"clock-frequency:0";
  66         };
  67 };