arch/arm/boot/dts/overlays/mcp251xfd-overlay.dts

   1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
   2
   3 /dts-v1/;
   4 /plugin/;
   5
   6 #include <dt-bindings/gpio/gpio.h>
   7 #include <dt-bindings/interrupt-controller/irq.h>
   8 #include <dt-bindings/pinctrl/bcm2835.h>
   9
  10 / {
  11         compatible = "brcm,bcm2835";
  12
  13         fragment@0 {
  14                 target = <&spidev0>;
  15                 __dormant__ {
  16                         status = "disabled";
  17                 };
  18         };
  19
  20         fragment@1 {
  21                 target = <&spidev1>;
  22                 __dormant__ {
  23                         status = "disabled";
  24                 };
  25         };
  26
  27         fragment@2 {
  28                 target-path = "spi1/spidev@0";
  29                 __dormant__ {
  30                         status = "disabled";
  31                 };
  32         };
  33
  34         fragment@3 {
  35                 target-path = "spi1/spidev@1";
  36                 __dormant__ {
  37                         status = "disabled";
  38                 };
  39         };
  40
  41         fragment@4 {
  42                 target-path = "spi1/spidev@2";
  43                 __dormant__ {
  44                         status = "disabled";
  45                 };
  46         };
  47
  48         fragment@5 {
  49                 target-path = "spi2/spidev@0";
  50                 __dormant__ {
  51                         status = "disabled";
  52                 };
  53         };
  54
  55         fragment@6 {
  56                 target-path = "spi2/spidev@1";
  57                 __dormant__ {
  58                         status = "disabled";
  59                 };
  60         };
  61
  62         fragment@7 {
  63                 target-path = "spi2/spidev@2";
  64                 __dormant__ {
  65                         status = "disabled";
  66                 };
  67         };
  68
  69         fragment@8 {
  70                 target = <&gpio>;
  71                 __overlay__ {
  72                         mcp251xfd_pins: mcp251xfd_pins {
  73                                 brcm,pins = <25>;
  74                                 brcm,function = <BCM2835_FSEL_GPIO_IN>;
  75                         };
  76                 };
  77         };
  78
  79         fragment@9 {
  80                 target-path = "/clocks";
  81                 __overlay__ {
  82                         clk_mcp251xfd_osc: mcp251xfd-osc {
  83                                 #clock-cells = <0>;
  84                                 compatible = "fixed-clock";
  85                                 clock-frequency = <40000000>;
  86                         };
  87                 };
  88         };
  89
  90         mcp251xfd_frag: fragment@10 {
  91                 target = <&spi0>;
  92                 __overlay__ {
  93                         status = "okay";
  94                         #address-cells = <1>;
  95                         #size-cells = <0>;
  96
  97                         mcp251xfd: mcp251xfd@0 {
  98                                 compatible = "microchip,mcp251xfd";
  99                                 reg = <0>;
 100                                 pinctrl-names = "default";
 101                                 pinctrl-0 = <&mcp251xfd_pins>;
 102                                 spi-max-frequency = <20000000>;
 103                                 interrupt-parent = <&gpio>;
 104                                 interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
 105                                 clocks = <&clk_mcp251xfd_osc>;
 106                         };
 107                 };
 108         };
 109
 110         fragment@11 {
 111                 target = <&mcp251xfd>;
 112                 mcp251xfd_rx_int_gpios: __dormant__ {
 113                         microchip,rx-int-gpios = <&gpio 255 GPIO_ACTIVE_LOW>;
 114                 };
 115         };
 116
 117         fragment@12 {
 118                 target = <&gpio>;
 119                 __dormant__ {
 120                         mcp251xfd_xceiver_pins: mcp251xfd_xceiver_pins {
 121                                 brcm,pins = <255>;
 122                                 brcm,function = <BCM2835_FSEL_GPIO_OUT>;
 123                         };
 124                 };
 125         };
 126
 127         fragment@13 {
 128                 target-path = "/";
 129                 __dormant__ {
 130                         reg_mcp251xfd_xceiver: reg_mcp251xfd_xceiver {
 131                                 compatible = "regulator-fixed";
 132                                 regulator-name = "mcp251xfd_xceiver";
 133                                 regulator-min-microvolt = <3300000>;
 134                                 regulator-max-microvolt = <3300000>;
 135                                 gpio = <&gpio 4 GPIO_ACTIVE_HIGH>;
 136                                 pinctrl-names = "default";
 137                                 pinctrl-0 = <&mcp251xfd_xceiver_pins>;
 138                         };
 139                 };
 140         };
 141
 142         fragment@14 {
 143                 target = <&mcp251xfd>;
 144                 __dormant__ {
 145                         xceiver-supply = <&reg_mcp251xfd_xceiver>;
 146                 };
 147         };
 148
 149         __overrides__ {
 150                 spi0-0 = <0>, "+0",
 151                         <&mcp251xfd_frag>, "target:0=", <&spi0>,
 152                         <&mcp251xfd>, "reg:0=0",
 153                         <&mcp251xfd_pins>, "name=mcp251xfd_spi0_0_pins",
 154                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi0-0-osc",
 155                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi0_0_xceiver_pins",
 156                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi0-0-xceiver",
 157                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi0-0-xceiver";
 158                 spi0-1 = <0>, "+1",
 159                         <&mcp251xfd_frag>, "target:0=", <&spi0>,
 160                         <&mcp251xfd>, "reg:0=1",
 161                         <&mcp251xfd_pins>, "name=mcp251xfd_spi0_1_pins",
 162                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi0-1-osc",
 163                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi0_1_xceiver_pins",
 164                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi0-1-xceiver",
 165                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi0-1-xceiver";
 166                 spi1-0 = <0>, "+2",
 167                         <&mcp251xfd_frag>, "target:0=", <&spi1>,
 168                         <&mcp251xfd>, "reg:0=0",
 169                         <&mcp251xfd_pins>, "name=mcp251xfd_spi1_0_pins",
 170                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi1-0-osc",
 171                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi1_0_xceiver_pins",
 172                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi1-0-xceiver",
 173                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi1-0-xceiver";
 174                 spi1-1 = <0>, "+3",
 175                         <&mcp251xfd_frag>, "target:0=", <&spi1>,
 176                         <&mcp251xfd>, "reg:0=1",
 177                         <&mcp251xfd_pins>, "name=mcp251xfd_spi1_1_pins",
 178                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi1-1-osc",
 179                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi1_1_xceiver_pins",
 180                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi1-1-xceiver",
 181                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi1-1-xceiver";
 182                 spi1-2 = <0>, "+4",
 183                         <&mcp251xfd_frag>, "target:0=", <&spi1>,
 184                         <&mcp251xfd>, "reg:0=2",
 185                         <&mcp251xfd_pins>, "name=mcp251xfd_spi1_2_pins",
 186                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi1-2-osc",
 187                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi1_2_xceiver_pins",
 188                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi1-2-xceiver",
 189                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi1-2-xceiver";
 190                 spi2-0 = <0>, "+5",
 191                         <&mcp251xfd_frag>, "target:0=", <&spi2>,
 192                         <&mcp251xfd>, "reg:0=0",
 193                         <&mcp251xfd_pins>, "name=mcp251xfd_spi2_0_pins",
 194                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi2-0-osc",
 195                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi2_0_xceiver_pins",
 196                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi2-0-xceiver",
 197                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi2-0-xceiver";
 198                 spi2-1 = <0>, "+6",
 199                         <&mcp251xfd_frag>, "target:0=", <&spi2>,
 200                         <&mcp251xfd>, "reg:0=1",
 201                         <&mcp251xfd_pins>, "name=mcp251xfd_spi2_1_pins",
 202                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi2-1-osc",
 203                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi2_1_xceiver_pins",
 204                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi2-1-xceiver",
 205                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi2-1-xceiver";
 206                 spi2-2 = <0>, "+7",
 207                         <&mcp251xfd_frag>, "target:0=", <&spi2>,
 208                         <&mcp251xfd>, "reg:0=2",
 209                         <&mcp251xfd_pins>, "name=mcp251xfd_spi2_2_pins",
 210                         <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi2-2-osc",
 211                         <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi2_2_xceiver_pins",
 212                         <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi2-2-xceiver",
 213                         <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi2-2-xceiver";
 214                 oscillator = <&clk_mcp251xfd_osc>, "clock-frequency:0";
 215                 speed = <&mcp251xfd>, "spi-max-frequency:0";
 216                 interrupt = <&mcp251xfd_pins>, "brcm,pins:0",
 217                         <&mcp251xfd>, "interrupts:0";
 218                 rx_interrupt = <0>, "+11",
 219                         <&mcp251xfd_pins>, "brcm,pins:4",
 220                         <&mcp251xfd_rx_int_gpios>, "microchip,rx-int-gpios:4";
 221                 xceiver_enable = <0>, "+12+13+14",
 222                         <&mcp251xfd_xceiver_pins>, "brcm,pins:0",
 223                         <&reg_mcp251xfd_xceiver>, "gpio:4";
 224                 xceiver_active_high = <&reg_mcp251xfd_xceiver>, "enable-active-high?";
 225         };
 226 };