arm: mvebu: enable gpio expander over i2c on Mirabox platform

The Globalscale Mirabox platform can be connected to the JTAG/GPIO box
through the Multi-IO port. The GPIO box use the NXP PCA9505 I/O port
expansion IC to provide 40-bit parallel input/output GPIOs. This patch
enable the use of this expander on the Mirabox.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/armada-370-mirabox.dts b/arch/arm/boot/dts/armada-370-mirabox.dts
index dd0c57dd9f30..193ae1467816 100644
--- a/arch/arm/boot/dts/armada-370-mirabox.dts
+++ b/arch/arm/boot/dts/armada-370-mirabox.dts
@@ -70,5 +70,16 @@
                 usb@d0051000 {
                         status = "okay";
                 };
+
+                i2c@d0011000 {
+                        status = "okay";
+                        clock-frequency = <100000>;
+                        pca9505: pca9505@25 {
+                                compatible = "nxp,pca9505";
+                                gpio-controller;
+                                #gpio-cells = <2>;
+                                reg = <0x25>;
+                        };
+                };
         };
 };