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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0281-overlays-mcp23017-Support-the-MCP23008.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0281-overlays-mcp23017-Support-the-MCP23008.patch49
1 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0281-overlays-mcp23017-Support-the-MCP23008.patch b/target/linux/brcm2708/patches-4.19/950-0281-overlays-mcp23017-Support-the-MCP23008.patch
new file mode 100644
index 0000000000..44f295a89e
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0281-overlays-mcp23017-Support-the-MCP23008.patch
@@ -0,0 +1,49 @@
+From c85a1ccbc6b1cab51a5fe5b916bcaf40bcd9096c Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 21 Jan 2019 12:19:57 +0000
+Subject: [PATCH] overlays: mcp23017: Support the MCP23008
+
+Add an 'mcp23008' parameter to enable support for the MCP23008 device.
+
+See: https://github.com/raspberrypi/linux/issues/2818
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/README | 2 ++
+ arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 10 +++++++++-
+ 2 files changed, 11 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1212,6 +1212,8 @@ Params: gpiopin Gpio pin
+
+ addr I2C address of the MCP23017 (default: 0x20)
+
++ mcp23008 Configure an MCP23008 instead.
++
+
+ Name: mcp23s17
+ Info: Configures the MCP23S08/17 SPI GPIO expanders.
+--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
++++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
+@@ -44,11 +44,19 @@
+ };
+ };
+ };
+-
++
++ fragment@3 {
++ target = <&mcp23017>;
++ __dormant__ {
++ compatible = "microchip,mcp23008";
++ };
++ };
++
+ __overrides__ {
+ gpiopin = <&mcp23017_pins>,"brcm,pins:0",
+ <&mcp23017>,"interrupts:0";
+ addr = <&mcp23017>,"reg:0";
++ mcp23008 = <0>,"=3";
+ };
+ };
+