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From 17159731ae064a70031d746284855b7d30f17407 Mon Sep 17 00:00:00 2001
From: Ed Spiridonov <edo.rus@gmail.com>
Date: Tue, 10 Dec 2019 22:45:04 +0300
Subject: [PATCH] Add universal device tree overlay for SPI devices
Just specify the SPI address and device name ("compatible" property).
This overlay lacks any device-specific parameter support!
(some of them could be added later)
Examples:
1. SPI NOR flash on spi0.1, maximum SPI clock frequency 45MHz:
dtoverlay=anyspi:spi0-1,dev="jedec,spi-nor",speed=45000000
2. MCP3204 ADC on spi1.2, maximum SPI clock frequency 500kHz:
dtoverlay=anyspi:spi1-2,dev="microchip,mcp3204"
Signed-off-by: Ed Spiridonov <edo.rus@gmail.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 23 ++
arch/arm/boot/dts/overlays/anyspi-overlay.dts | 205 ++++++++++++++++++
3 files changed, 229 insertions(+)
create mode 100755 arch/arm/boot/dts/overlays/anyspi-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -15,6 +15,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
allo-katana-dac-audio.dtbo \
allo-piano-dac-pcm512x-audio.dtbo \
allo-piano-dac-plus-pcm512x-audio.dtbo \
+ anyspi.dtbo \
apds9960.dtbo \
applepi-dac.dtbo \
at86rf233.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -441,6 +441,29 @@ Params: 24db_digital_gain Allow ga
better voice quality. (default Off)
+Name: anyspi
+Info: Universal device tree overlay for SPI devices
+
+ Just specify the SPI address and device name ("compatible" property).
+ This overlay lacks any device-specific parameter support!
+
+ For devices on spi1 or spi2, the interfaces should be enabled
+ with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
+
+ Examples:
+ 1. SPI NOR flash on spi0.1, maximum SPI clock frequency 45MHz:
+ dtoverlay=anyspi:spi0-1,dev="jedec,spi-nor",speed=45000000
+ 2. MCP3204 ADC on spi1.2, maximum SPI clock frequency 500kHz:
+ dtoverlay=anyspi:spi1-2,dev="microchip,mcp3204"
+Load: dtoverlay=anyspi,<param>=<val>
+Params: spi<n>-<m> Configure device at spi<n>, cs<m>
+ (boolean, required)
+ dev Set device name to search compatible module
+ (string, required)
+ speed Set SPI clock frequency in Hz
+ (integer, optional, default 500000)
+
+
Name: apds9960
Info: Configures the AVAGO APDS9960 digital proximity, ambient light, RGB and
gesture sensor
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/anyspi-overlay.dts
@@ -0,0 +1,205 @@
+/*
+ * Universal device tree overlay for SPI devices
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&spidev0>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@1 {
+ target = <&spidev1>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@2 {
+ target-path = "spi1/spidev@0";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@3 {
+ target-path = "spi1/spidev@1";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@4 {
+ target-path = "spi1/spidev@2";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@5 {
+ target-path = "spi2/spidev@0";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@6 {
+ target-path = "spi2/spidev@1";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@7 {
+ target-path = "spi2/spidev@2";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@8 {
+ target = <&spi0>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_00: anyspi@0 {
+ reg = <0>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@9 {
+ target = <&spi0>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_01: anyspi@1 {
+ reg = <1>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@10 {
+ target = <&spi1>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_10: anyspi@0 {
+ reg = <0>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@11 {
+ target = <&spi1>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_11: anyspi@1 {
+ reg = <1>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@12 {
+ target = <&spi1>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_12: anyspi@2 {
+ reg = <2>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@13 {
+ target = <&spi2>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_20: anyspi@0 {
+ reg = <0>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@14 {
+ target = <&spi2>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_21: anyspi@1 {
+ reg = <1>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ fragment@15 {
+ target = <&spi2>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ anyspi_22: anyspi@2 {
+ reg = <2>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ __overrides__ {
+ spi0-0 = <0>, "+0+8";
+ spi0-1 = <0>, "+1+9";
+ spi1-0 = <0>, "+2+10";
+ spi1-1 = <0>, "+3+11";
+ spi1-2 = <0>, "+4+12";
+ spi2-0 = <0>, "+5+13";
+ spi2-1 = <0>, "+6+14";
+ spi2-2 = <0>, "+7+15";
+ dev = <&anyspi_00>,"compatible",
+ <&anyspi_01>,"compatible",
+ <&anyspi_10>,"compatible",
+ <&anyspi_11>,"compatible",
+ <&anyspi_12>,"compatible",
+ <&anyspi_20>,"compatible",
+ <&anyspi_21>,"compatible",
+ <&anyspi_22>,"compatible";
+ speed = <&anyspi_00>, "spi-max-frequency:0",
+ <&anyspi_01>, "spi-max-frequency:0",
+ <&anyspi_10>, "spi-max-frequency:0",
+ <&anyspi_11>, "spi-max-frequency:0",
+ <&anyspi_12>, "spi-max-frequency:0",
+ <&anyspi_20>, "spi-max-frequency:0",
+ <&anyspi_21>, "spi-max-frequency:0",
+ <&anyspi_22>, "spi-max-frequency:0";
+ };
+};
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