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