[PATCH v3 5/6] arm/dt: Basic versatile devicetree support

[Grant Likely]

This patch adds adds very basic support for booting versatile with a
device tree.  It simply allows the existing machine_descs to match
against the versatile ab & pb compatible values so that the kernel can
boot.  Kernel parameters and the initrd pointer is read out of the
tree instead of atags.

This is not complete device tree support.  This change will be
reverted when a new machine_desc is added that can populate the
versatile device registrations directly from data in the tree instead
of using hard coded data.  That change will be made in a future patch.

Signed-off-by: Grant Likely <grant.likely at secretlab.ca>
---
 arch/arm/mach-versatile/versatile_ab.c |    6 ++++++
 arch/arm/mach-versatile/versatile_pb.c |    6 ++++++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-versatile/versatile_ab.c b/arch/arm/mach-versatile/versatile_ab.c
index aa9730f..62053df 100644
--- a/arch/arm/mach-versatile/versatile_ab.c
+++ b/arch/arm/mach-versatile/versatile_ab.c
@@ -33,6 +33,11 @@
 
 #include "core.h"
 
+static const char *versatile_ab_match[] __initdata = {
+	"arm,versatile-ab",
+	NULL,
+};
+
 MACHINE_START(VERSATILE_AB, "ARM-Versatile AB")
 	/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 	.boot_params	= 0x00000100,
@@ -40,4 +45,5 @@ MACHINE_START(VERSATILE_AB, "ARM-Versatile AB")
 	.init_irq	= versatile_init_irq,
 	.timer		= &versatile_timer,
 	.init_machine	= versatile_init,
+	.dt_compat	= versatile_ab_match,
 MACHINE_END
diff --git a/arch/arm/mach-versatile/versatile_pb.c b/arch/arm/mach-versatile/versatile_pb.c
index bf46964..eba12fa 100644
--- a/arch/arm/mach-versatile/versatile_pb.c
+++ b/arch/arm/mach-versatile/versatile_pb.c
@@ -106,6 +106,11 @@ static void __init versatile_pb_init(void)
 	}
 }
 
+static const char *versatile_pb_match[] __initdata = {
+	"arm,versatile-pb",
+	NULL,
+};
+
 MACHINE_START(VERSATILE_PB, "ARM-Versatile PB")
 	/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 	.boot_params	= 0x00000100,
@@ -113,4 +118,5 @@ MACHINE_START(VERSATILE_PB, "ARM-Versatile PB")
 	.init_irq	= versatile_init_irq,
 	.timer		= &versatile_timer,
 	.init_machine	= versatile_pb_init,
+	.dt_compat	= versatile_pb_match,
 MACHINE_END