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From c952f560bf95867368542c0f2e46abe536ad9afc Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 5 Oct 2015 10:47:45 +0100
Subject: [PATCH] BCM270X_DT: Add at86rf233 overlay
Add an overlay to support the Atmel AT86RF233 WPAN transceiver on spi0.0.
See: https://github.com/raspberrypi/linux/issues/1151
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 21 +++++++--
arch/arm/boot/dts/overlays/at86rf233-overlay.dts | 54 ++++++++++++++++++++++++
3 files changed, 72 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/boot/dts/overlays/at86rf233-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -13,6 +13,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
endif
dtb-$(RPI_DT_OVERLAYS) += ads7846-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += at86rf233-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += dht11-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += enc28j60-overlay.dtb
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -69,13 +69,14 @@ DT parameters:
Parameters always have default values, although in some cases (e.g. "w1-gpio")
it is necessary to provided multiple overlays in order to get the desired
-behaviour. See the list of overlays below for a description of the parameters and their defaults.
+behaviour. See the list of overlays below for a description of the parameters
+and their defaults.
The Overlay and Parameter Reference
===================================
-N.B. When editing this file, please preserve the indentation levels to make it simple to parse
-programmatically. NO HARD TABS.
+N.B. When editing this file, please preserve the indentation levels to make it
+simple to parse programmatically. NO HARD TABS.
Name: <The base DTB>
@@ -149,7 +150,7 @@ Name: ads7846
Info: ADS7846 Touch controller
Load: dtoverlay=ads7846,<param>=<val>
Params: cs SPI bus Chip Select (default 1)
- speed SPI bus speed (default 2Mhz, max 3.25MHz)
+ speed SPI bus speed (default 2MHz, max 3.25MHz)
penirq GPIO used for PENIRQ. REQUIRED
penirq_pull Set GPIO pull (default 0=none, 2=pullup)
swapxy Swap x and y axis
@@ -170,6 +171,18 @@ Params: cs SPI bus
www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt
+Name: at86rf233
+Info: Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver,
+ connected to spi0.0
+Load: dtoverlay=at86rf233,<param>=<val>
+Params: interrupt GPIO used for INT (default 23)
+ reset GPIO used for Reset (default 24)
+ sleep GPIO used for Sleep (default 25)
+ speed SPI bus speed in Hz (default 6000000)
+ trim Fine tuning of the internal capacitance
+ arrays (0=+0pF, 15=+4.5pF, default 15)
+
+
Name: bmp085_i2c-sensor
Info: Configures the BMP085/BMP180 digital barometric pressure and temperature
sensors from Bosch Sensortec
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/at86rf233-overlay.dts
@@ -0,0 +1,54 @@
+/dts-v1/;
+/plugin/;
+
+/* Overlay for Atmel AT86RF233 IEEE 802.15.4 WPAN transceiver on spi0.0 */
+
+/ {
+ compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";
+
+ fragment@0 {
+ target = <&spi0>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ status = "okay";
+
+ spidev@0{
+ status = "disabled";
+ };
+
+ lowpan0: at86rf233@0 {
+ compatible = "atmel,at86rf233";
+ reg = <0>;
+ interrupt-parent = <&gpio>;
+ interrupts = <23 4>; /* active high */
+ reset-gpio = <&gpio 24 1>;
+ sleep-gpio = <&gpio 25 1>;
+ spi-max-frequency = <6000000>;
+ xtal-trim = /bits/ 8 <0xf>;
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ lowpan0_pins: lowpan0_pins {
+ brcm,pins = <23 24 25>;
+ brcm,function = <0 1 1>; /* in out out */
+ };
+ };
+ };
+
+ __overrides__ {
+ interrupt = <&lowpan0>, "interrupts:0",
+ <&lowpan0_pins>, "brcm,pins:0";
+ reset = <&lowpan0>, "reset-gpio:4",
+ <&lowpan0_pins>, "brcm,pins:4";
+ sleep = <&lowpan0>, "sleep-gpio:4",
+ <&lowpan0_pins>, "brcm,pins:8";
+ speed = <&lowpan0>, "spi-max-frequency:0";
+ trim = <&lowpan0>, "xtal-trim.0";
+ };
+};
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