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BCM270X_DT: Add at86rf233 overlay

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Add an overlay to support the Atmel AT86RF233 WPAN transceiver on spi0.0.

See: https://github.com/raspberrypi/linux/issues/1151
This commit is contained in:
Phil Elwell
2015-10-05 10:47:45 +01:00
committed by popcornmix
parent 10813a80e6
commit 2b80e4024c
3 changed files with 72 additions and 4 deletions
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1
arch/arm/boot/dts/overlays/Makefile
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@@ -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

21
arch/arm/boot/dts/overlays/README
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@@ -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 Chip Select (default 1)
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 750000)
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

54
arch/arm/boot/dts/overlays/at86rf233-overlay.dts Normal file
View File

@@ -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 = <7500000>;
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";
};
};