[RFC 5/5] powerpc/fsl: Add supported-irq-ranges for P2020

[Bharat Bhushan <Bharat.Bhushan@nxp.com>]

MPIC on NXP (Freescale) P2020 supports following irq
ranges:
  > 0 - 11      (External interrupt)
  > 16 - 79     (Internal interrupt)
  > 176 - 183   (Messaging interrupt)
  > 224 - 231   (Shared message signaled interrupt)

We have to remove "irq_count" from platform code as platform
is given precedence over device-tree, while I think device-tree
should have precedence.

Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
---
 arch/powerpc/boot/dts/fsl/p2020si-post.dtsi | 3 +++
 arch/powerpc/platforms/85xx/mpc85xx_rdb.c   | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/arch/powerpc/boot/dts/fsl/p2020si-post.dtsi b/arch/powerpc/boot/dts/fsl/p2020si-post.dtsi
index 884e01b..08e266b 100644
--- a/arch/powerpc/boot/dts/fsl/p2020si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/p2020si-post.dtsi
@@ -192,6 +192,9 @@
 /include/ "pq3-sec3.1-0.dtsi"
 /include/ "pq3-mpic.dtsi"
 /include/ "pq3-mpic-timer-B.dtsi"
+	pic@40000 {
+		supported-irq-ranges = <0 11 16 79 176 183 224 231>;
+	};
 
 	global-utilities@e0000 {
 		compatible = "fsl,p2020-guts";
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_rdb.c b/arch/powerpc/platforms/85xx/mpc85xx_rdb.c
index 1006950..49ff348 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_rdb.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_rdb.c
@@ -57,6 +57,11 @@ void __init mpc85xx_rdb_pic_init(void)
 			MPIC_BIG_ENDIAN |
 			MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");
+	} else if (of_machine_is_compatible("fsl,P2020RDB-PC")) {
+		mpic = mpic_alloc(NULL, 0,
+		  MPIC_BIG_ENDIAN |
+		  MPIC_SINGLE_DEST_CPU,
+		  0, 0, " OpenPIC  ");
 	} else {
 		mpic = mpic_alloc(NULL, 0,
 		  MPIC_BIG_ENDIAN |
-- 
1.9.3