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-rw-r--r--target/linux/bcm27xx/patches-4.19/950-0791-Add-universal-device-tree-overlay-for-SPI-devices.patch273
1 files changed, 273 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0791-Add-universal-device-tree-overlay-for-SPI-devices.patch b/target/linux/bcm27xx/patches-4.19/950-0791-Add-universal-device-tree-overlay-for-SPI-devices.patch
new file mode 100644
index 0000000000..ce027e72f0
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0791-Add-universal-device-tree-overlay-for-SPI-devices.patch
@@ -0,0 +1,273 @@
+From 4d19be9132ca10cf582450a86dcb2c41f227f589 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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