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-rw-r--r--target/linux/bcm27xx/patches-4.19/950-0268-overlays-Add-mcp342x-overlay.patch148
1 files changed, 148 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0268-overlays-Add-mcp342x-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0268-overlays-Add-mcp342x-overlay.patch
new file mode 100644
index 0000000000..d104c65cc3
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0268-overlays-Add-mcp342x-overlay.patch
@@ -0,0 +1,148 @@
+From b71f1fd962c66ba3fa46483f193cc2263146c5bf Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 21 Jan 2019 12:23:55 +0000
+Subject: [PATCH] overlays: Add mcp342x overlay
+
+Support the MCP342x family of ADCs from Microchip.
+
+See: https://github.com/raspberrypi/linux/issues/2819
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 16 ++++
+ .../arm/boot/dts/overlays/mcp342x-overlay.dts | 93 +++++++++++++++++++
+ 3 files changed, 110 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/mcp342x-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -79,6 +79,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ mcp2515-can1.dtbo \
+ mcp3008.dtbo \
+ mcp3202.dtbo \
++ mcp342x.dtbo \
+ media-center.dtbo \
+ midi-uart0.dtbo \
+ midi-uart1.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1277,6 +1277,22 @@ Params: spi<n>-<m>-present boolean,
+ spi<n>-<m>-speed integer, set the spi bus speed for this device
+
+
++Name: mcp342x
++Info: Overlay for activation of Microchip MCP3421-3428 ADCs over I2C
++Load: dtoverlay=mcp342x,<param>=<val>
++Params: addr I2C bus address of device, for devices with
++ addresses that are configurable, e.g. by
++ hardware links (default=0x68)
++ mcp3421 The device is an MCP3421
++ mcp3422 The device is an MCP3422
++ mcp3423 The device is an MCP3423
++ mcp3424 The device is an MCP3424
++ mcp3425 The device is an MCP3425
++ mcp3426 The device is an MCP3426
++ mcp3427 The device is an MCP3427
++ mcp3428 The device is an MCP3428
++
++
+ Name: media-center
+ Info: Media Center HAT - 2.83" Touch Display + extras by Pi Supply
+ Load: dtoverlay=media-center,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/mcp342x-overlay.dts
+@@ -0,0 +1,93 @@
++// Overlay for MCP3421-8 ADCs from Microchip Semiconductor
++
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
++
++ fragment@0 {
++ target = <&i2c1>;
++ __overlay__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ status = "okay";
++
++ mcp342x: mcp@68 {
++ reg = <0x68>;
++
++ status = "okay";
++ };
++ };
++ };
++
++ fragment@1 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3421";
++ };
++ };
++
++ fragment@2 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3422";
++ };
++ };
++
++ fragment@3 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3423";
++ };
++ };
++
++ fragment@4 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3424";
++ };
++ };
++
++ fragment@5 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3425";
++ };
++ };
++
++ fragment@6 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3426";
++ };
++ };
++
++ fragment@7 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3427";
++ };
++ };
++
++ fragment@8 {
++ target = <&mcp342x>;
++ __dormant__ {
++ compatible = "microchip,mcp3428";
++ };
++ };
++
++ __overrides__ {
++ addr = <&mcp342x>,"reg:0";
++ mcp3421 = <0>,"=1";
++ mcp3422 = <0>,"=2";
++ mcp3423 = <0>,"=3";
++ mcp3424 = <0>,"=4";
++ mcp3425 = <0>,"=5";
++ mcp3426 = <0>,"=6";
++ mcp3427 = <0>,"=7";
++ mcp3428 = <0>,"=8";
++ };
++};
++