arch/arm/boot/dts/overlays/waveshare-can-fd-hat-mode-b-overlay.dts

   1 // redo: ovmerge -c mcp251xfd-overlay.dts,spi0-0,interrupt=25 mcp251xfd-overlay.dts,spi0-1,interrupt=16
   2
   3 // Device tree overlay for https://www.waveshare.com/2-ch-can-fd-hat.htm
   4 // in "Mode B" (requried hardware modification) configuration
   5 // for details see https://www.waveshare.com/wiki/2-CH_CAN_FD_HAT
   6
   7
   8 /dts-v1/;
   9 /plugin/;
  10
  11 #include <dt-bindings/gpio/gpio.h>
  12 #include <dt-bindings/interrupt-controller/irq.h>
  13 #include <dt-bindings/pinctrl/bcm2835.h>
  14
  15 / {
  16         compatible = "brcm,bcm2835";
  17         fragment@0 {
  18                 target = <&spidev0>;
  19                 __overlay__ {
  20                         status = "disabled";
  21                 };
  22         };
  23         fragment@1 {
  24                 target = <&gpio>;
  25                 __overlay__ {
  26                         mcp251xfd_pins: mcp251xfd_spi0_0_pins {
  27                                 brcm,pins = <25>;
  28                                 brcm,function = <BCM2835_FSEL_GPIO_IN>;
  29                         };
  30                 };
  31         };
  32         fragment@2 {
  33                 target-path = "/clocks";
  34                 __overlay__ {
  35                         clk_mcp251xfd_osc: mcp251xfd-spi0-0-osc {
  36                                 #clock-cells = <0>;
  37                                 compatible = "fixed-clock";
  38                                 clock-frequency = <40000000>;
  39                         };
  40                 };
  41         };
  42         fragment@3 {
  43                 target = <&spi0>;
  44                 __overlay__ {
  45                         status = "okay";
  46                         #address-cells = <1>;
  47                         #size-cells = <0>;
  48                         mcp251xfd@0 {
  49                                 compatible = "microchip,mcp251xfd";
  50                                 reg = <0>;
  51                                 pinctrl-names = "default";
  52                                 pinctrl-0 = <&mcp251xfd_pins>;
  53                                 spi-max-frequency = <20000000>;
  54                                 interrupt-parent = <&gpio>;
  55                                 interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
  56                                 clocks = <&clk_mcp251xfd_osc>;
  57                         };
  58                 };
  59         };
  60         fragment@4 {
  61                 target = <&spidev1>;
  62                 __overlay__ {
  63                         status = "disabled";
  64                 };
  65         };
  66         fragment@5 {
  67                 target = <&gpio>;
  68                 __overlay__ {
  69                         mcp251xfd_pins_1: mcp251xfd_spi0_1_pins {
  70                                 brcm,pins = <16>;
  71                                 brcm,function = <BCM2835_FSEL_GPIO_IN>;
  72                         };
  73                 };
  74         };
  75         fragment@6 {
  76                 target-path = "/clocks";
  77                 __overlay__ {
  78                         clk_mcp251xfd_osc_1: mcp251xfd-spi0-1-osc {
  79                                 #clock-cells = <0>;
  80                                 compatible = "fixed-clock";
  81                                 clock-frequency = <40000000>;
  82                         };
  83                 };
  84         };
  85         fragment@7 {
  86                 target = <&spi0>;
  87                 __overlay__ {
  88                         status = "okay";
  89                         #address-cells = <1>;
  90                         #size-cells = <0>;
  91                         mcp251xfd@1 {
  92                                 compatible = "microchip,mcp251xfd";
  93                                 reg = <1>;
  94                                 pinctrl-names = "default";
  95                                 pinctrl-0 = <&mcp251xfd_pins_1>;
  96                                 spi-max-frequency = <20000000>;
  97                                 interrupt-parent = <&gpio>;
  98                                 interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
  99                                 clocks = <&clk_mcp251xfd_osc_1>;
 100                         };
 101                 };
 102         };
 103 };