ARM: mvebu: ensure the mdio node has a clock reference on Armada 370/XP

commit a6e03dd451c724f785277d8ecca5d1a0b886d892 upstream.

The mvmdio driver accesses some register of the Ethernet unit. It
therefore takes a reference and enables a clock. However, on Armada
370/XP, no clock specification was given in the Device Tree, which
leads the mvmdio driver to fail when being used as a module and loaded
before the mvneta driver: it tries to access a register from a
hardware unit that isn't clocked.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1395790439-21332-2-git-send-email-thomas.petazzoni@free-electrons.com
Acked-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/arch/arm/boot/dts/armada-370-xp.dtsi b/arch/arm/boot/dts/armada-370-xp.dtsi
index 364a63dce6c57c8214acdf56c476f00dd606b9b4..beae26c4f3fbe249a82f38107e702be793e0a785 100644 (file)
--- a/arch/arm/boot/dts/armada-370-xp.dtsi
+++ b/arch/arm/boot/dts/armada-370-xp.dtsi
@@ -156,6 +156,7 @@
                                #size-cells = <0>;
                                compatible = "marvell,orion-mdio";
                                reg = <0x72004 0x4>;
+                               clocks = <&gateclk 4>;
                        };
 
                        eth0: ethernet@70000 {