overlays: mcp23017: rename the GPIO pins node with the device

In order to allow the overlay to be loaded multiple times the
GPIO node for the interrupt line needs to be unique.
Rename it based on the MCP23017 I2C address

https://github.com/raspberrypi/linux/issues/3207

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>

diff --git a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
index f6421bd..b5148ba 100644 (file)
--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
+++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
@@ -16,7 +16,7 @@
        fragment@1 {
                target = <&gpio>;
                __overlay__ {
-                       mcp23017_pins: mcp23017_pins {
+                       mcp23017_pins: mcp23017_pins@20 {
                                brcm,pins = <4>;
                                brcm,function = <0>;
                        };
@@ -55,7 +55,7 @@
        __overrides__ {
                gpiopin = <&mcp23017_pins>,"brcm,pins:0",
                                <&mcp23017>,"interrupts:0";
-               addr = <&mcp23017>,"reg:0";
+               addr = <&mcp23017>,"reg:0", <&mcp23017_pins>,"reg:0";
                mcp23008 = <0>,"=3";
        };
 };