target/linux/brcm2708/patches-4.4/0110-BCM270X_DT-Add-at86rf233-overlay.patch

   1 From 7a9f95c67cbfc0975e1109b904ad03e061fb6877 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 5 Oct 2015 10:47:45 +0100
   4 Subject: [PATCH 110/381] BCM270X_DT: Add at86rf233 overlay
   5
   6 Add an overlay to support the Atmel AT86RF233 WPAN transceiver on spi0.0.
   7
   8 See: https://github.com/raspberrypi/linux/issues/1151
   9 ---
  10  arch/arm/boot/dts/overlays/Makefile              |  1 +
  11  arch/arm/boot/dts/overlays/README                | 21 +++++++--
  12  arch/arm/boot/dts/overlays/at86rf233-overlay.dts | 54 ++++++++++++++++++++++++
  13  3 files changed, 72 insertions(+), 4 deletions(-)
  14  create mode 100644 arch/arm/boot/dts/overlays/at86rf233-overlay.dts
  15
  16 --- a/arch/arm/boot/dts/overlays/Makefile
  17 +++ b/arch/arm/boot/dts/overlays/Makefile
  18 @@ -13,6 +13,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
  19  endif
  20
  21  dtb-$(RPI_DT_OVERLAYS) += ads7846-overlay.dtb
  22 +dtb-$(RPI_DT_OVERLAYS) += at86rf233-overlay.dtb
  23  dtb-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor-overlay.dtb
  24  dtb-$(RPI_DT_OVERLAYS) += dht11-overlay.dtb
  25  dtb-$(RPI_DT_OVERLAYS) += enc28j60-overlay.dtb
  26 --- a/arch/arm/boot/dts/overlays/README
  27 +++ b/arch/arm/boot/dts/overlays/README
  28 @@ -69,13 +69,14 @@ DT parameters:
  29
  30  Parameters always have default values, although in some cases (e.g. "w1-gpio")
  31  it is necessary to provided multiple overlays in order to get the desired
  32 -behaviour. See the list of overlays below for a description of the parameters and their defaults.
  33 +behaviour. See the list of overlays below for a description of the parameters
  34 +and their defaults.
  35
  36  The Overlay and Parameter Reference
  37  ===================================
  38
  39 -N.B. When editing this file, please preserve the indentation levels to make it simple to parse
  40 -programmatically. NO HARD TABS.
  41 +N.B. When editing this file, please preserve the indentation levels to make it
  42 +simple to parse programmatically. NO HARD TABS.
  43
  44
  45  Name:   <The base DTB>
  46 @@ -149,7 +150,7 @@ Name:   ads7846
  47  Info:   ADS7846 Touch controller
  48  Load:   dtoverlay=ads7846,<param>=<val>
  49  Params: cs                       SPI bus Chip Select (default 1)
  50 -        speed                    SPI bus speed (default 2Mhz, max 3.25MHz)
  51 +        speed                    SPI bus speed (default 2MHz, max 3.25MHz)
  52          penirq                   GPIO used for PENIRQ. REQUIRED
  53          penirq_pull              Set GPIO pull (default 0=none, 2=pullup)
  54          swapxy                   Swap x and y axis
  55 @@ -170,6 +171,18 @@ Params: cs                       SPI bus
  56          www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt
  57
  58
  59 +Name:   at86rf233
  60 +Info:   Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver,
  61 +        connected to spi0.0
  62 +Load:   dtoverlay=at86rf233,<param>=<val>
  63 +Params: interrupt                GPIO used for INT (default 23)
  64 +        reset                    GPIO used for Reset (default 24)
  65 +        sleep                    GPIO used for Sleep (default 25)
  66 +        speed                    SPI bus speed in Hz (default 6000000)
  67 +        trim                     Fine tuning of the internal capacitance
  68 +                                 arrays (0=+0pF, 15=+4.5pF, default 15)
  69 +
  70 +
  71  Name:   bmp085_i2c-sensor
  72  Info:   Configures the BMP085/BMP180 digital barometric pressure and temperature
  73          sensors from Bosch Sensortec
  74 --- /dev/null
  75 +++ b/arch/arm/boot/dts/overlays/at86rf233-overlay.dts
  76 @@ -0,0 +1,54 @@
  77 +/dts-v1/;
  78 +/plugin/;
  79 +
  80 +/* Overlay for Atmel AT86RF233 IEEE 802.15.4 WPAN transceiver on spi0.0 */
  81 +
  82 +/ {
  83 +       compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";
  84 +
  85 +       fragment@0 {
  86 +               target = <&spi0>;
  87 +               __overlay__ {
  88 +                       #address-cells = <1>;
  89 +                       #size-cells = <0>;
  90 +
  91 +                       status = "okay";
  92 +
  93 +                       spidev@0{
  94 +                               status = "disabled";
  95 +                       };
  96 +
  97 +                       lowpan0: at86rf233@0 {
  98 +                               compatible = "atmel,at86rf233";
  99 +                               reg = <0>;
 100 +                               interrupt-parent = <&gpio>;
 101 +                               interrupts = <23 4>; /* active high */
 102 +                               reset-gpio = <&gpio 24 1>;
 103 +                               sleep-gpio = <&gpio 25 1>;
 104 +                               spi-max-frequency = <6000000>;
 105 +                               xtal-trim = /bits/ 8 <0xf>;
 106 +                       };
 107 +               };
 108 +       };
 109 +
 110 +       fragment@1 {
 111 +               target = <&gpio>;
 112 +               __overlay__ {
 113 +                       lowpan0_pins: lowpan0_pins {
 114 +                               brcm,pins = <23 24 25>;
 115 +                               brcm,function = <0 1 1>; /* in out out */
 116 +                       };
 117 +               };
 118 +       };
 119 +
 120 +       __overrides__ {
 121 +               interrupt = <&lowpan0>, "interrupts:0",
 122 +                       <&lowpan0_pins>, "brcm,pins:0";
 123 +               reset     = <&lowpan0>, "reset-gpio:4",
 124 +                       <&lowpan0_pins>, "brcm,pins:4";
 125 +               sleep     = <&lowpan0>, "sleep-gpio:4",
 126 +                       <&lowpan0_pins>, "brcm,pins:8";
 127 +               speed     = <&lowpan0>, "spi-max-frequency:0";
 128 +               trim      = <&lowpan0>, "xtal-trim.0";
 129 +       };
 130 +};