--- /dev/null
+From fbaf66882e8c247111a190d51c4f397092c8e65a Mon Sep 17 00:00:00 2001
+From: Scott Ellis <scott@jumpnowtek.com>
+Date: Fri, 27 Jan 2017 06:42:42 -0500
+Subject: [PATCH] Add overlay for mcp3008 adc (#1818)
+
+Some example usage:
+
+SPI0.0
+dtparam=spi=on
+dtoverlay=mcp3008:spi0-0-present
+
+SPI0.1
+dtparam=spi=on
+dtoverlay=mcp3008:spi0-1-present
+
+SPI0.0 and SPI0.1
+dtparam=spi=on
+dtoverlay=mcp3008:spi0-0-present,spi0-1-present
+
+SPI1.0
+dtparam=spi=on
+dtoverlay=spi1-1cs
+dtoverlay=mcp3008:spi1-0-present
+
+SPI1.2
+dtparam=spi=on
+dtoverlay=spi1-1cs:cs0_pin=16
+dtoverlay=mcp3008:spi1-0-present
+
+SPI1.0 and SPI1.1
+dtoverlay=spi1-2cs
+dtoverlay=mcp3008:spi1-0-present,spi1-1-present
+
+Changing the speed
+
+SPI0.0
+dtparam=spi=on
+dtoverlay=mcp3008:spi0-0-present,spi0-0-speed=2000000
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 9 ++
+ arch/arm/boot/dts/overlays/mcp3008-overlay.dts | 205 +++++++++++++++++++++++++
+ 3 files changed, 215 insertions(+)
+ create mode 100755 arch/arm/boot/dts/overlays/mcp3008-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -57,6 +57,7 @@ dtbo-$(RPI_DT_OVERLAYS) += mcp23017.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += mcp23s17.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can0.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can1.dtbo
++dtbo-$(RPI_DT_OVERLAYS) += mcp3008.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += mmc.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += mz61581.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += pi3-act-led.dtbo
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -736,6 +736,15 @@ Params: oscillator Clock fr
+ interrupt GPIO for interrupt signal
+
+
++Name: mcp3008
++Info: Configures MCP3008 A/D converters
++ 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.
++Load: dtoverlay=mcp3008,<param>[=<val>]
++Params: spi<n>-<m>-present boolean, configure device at spi<n>, cs<m>
++ spi<n>-<m>-speed integer, set the spi bus speed for this device
++
++
+ Name: mmc
+ Info: Selects the bcm2835-mmc SD/MMC driver, optionally with overclock
+ Load: dtoverlay=mmc,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/mcp3008-overlay.dts
+@@ -0,0 +1,205 @@
++/*
++ * Device tree overlay for Microchip mcp3008 10-Bit A/D Converters
++ */
++
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
++
++ 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>;
++
++ mcp3008_00: mcp3008@0 {
++ compatible = "mcp3008";
++ reg = <0>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@9 {
++ target = <&spi0>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_01: mcp3008@1 {
++ compatible = "mcp3008";
++ reg = <1>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@10 {
++ target = <&spi1>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_10: mcp3008@0 {
++ compatible = "mcp3008";
++ reg = <0>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@11 {
++ target = <&spi1>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_11: mcp3008@1 {
++ compatible = "mcp3008";
++ reg = <1>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@12 {
++ target = <&spi1>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_12: mcp3008@2 {
++ compatible = "mcp3008";
++ reg = <2>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@13 {
++ target = <&spi2>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_20: mcp3008@0 {
++ compatible = "mcp3008";
++ reg = <0>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@14 {
++ target = <&spi2>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_21: mcp3008@1 {
++ compatible = "mcp3008";
++ reg = <1>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ fragment@15 {
++ target = <&spi2>;
++ __dormant__ {
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ mcp3008_22: mcp3008@2 {
++ compatible = "mcp3008";
++ reg = <2>;
++ spi-max-frequency = <1600000>;
++ };
++ };
++ };
++
++ __overrides__ {
++ spi0-0-present = <0>, "+0+8";
++ spi0-1-present = <0>, "+1+9";
++ spi1-0-present = <0>, "+2+10";
++ spi1-1-present = <0>, "+3+11";
++ spi1-2-present = <0>, "+4+12";
++ spi2-0-present = <0>, "+5+13";
++ spi2-1-present = <0>, "+6+14";
++ spi2-2-present = <0>, "+7+15";
++ spi0-0-speed = <&mcp3008_00>, "spi-max-frequency:0";
++ spi0-1-speed = <&mcp3008_01>, "spi-max-frequency:0";
++ spi1-0-speed = <&mcp3008_10>, "spi-max-frequency:0";
++ spi1-1-speed = <&mcp3008_11>, "spi-max-frequency:0";
++ spi1-2-speed = <&mcp3008_12>, "spi-max-frequency:0";
++ spi2-0-speed = <&mcp3008_20>, "spi-max-frequency:0";
++ spi2-1-speed = <&mcp3008_21>, "spi-max-frequency:0";
++ spi2-2-speed = <&mcp3008_22>, "spi-max-frequency:0";
++ };
++};
projects / openwrt / staging / yousong.git / blobdiff