[RFC][PATCH] powerpc/86xx: Add binding for LAWs and MCM

[Kumar Gala]

The first 4k region of CCSR space is well defined for local access
windows, CCSRBAR, etc.  The second 4k region is well defined as
register for configuring and getting errors for the MPX coherency
module.

Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
---
Please review.  Once we close on this I intend to mimic this for the 85xx based
chips.

- k

 Documentation/powerpc/dts-bindings/fsl/mcm.txt |   64 ++++++++++++++++++++++++
 arch/powerpc/boot/dts/mpc8641_hpcn.dts         |   13 +++++
 2 files changed, 77 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/powerpc/dts-bindings/fsl/mcm.txt

diff --git a/Documentation/powerpc/dts-bindings/fsl/mcm.txt b/Documentation/powerpc/dts-bindings/fsl/mcm.txt
new file mode 100644
index 0000000..4ceda9b
--- /dev/null
+++ b/Documentation/powerpc/dts-bindings/fsl/mcm.txt
@@ -0,0 +1,64 @@
+=====================================================================
+MPX LAW & Coherency Module Device Tree Binding
+Copyright (C) 2009 Freescale Semiconductor Inc.
+=====================================================================
+
+Local Access Window (LAW) Node
+
+The LAW node represents the region of CCSR space where local access
+windows are configured.  For MCM based devices this is the first 4k
+of CCSR space that includes CCSRBAR, ALTCBAR, ALTCAR, BPTR, and some
+number of local access windows as specified by fsl,num-laws.
+
+PROPERTIES
+
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,mcm-law"
+
+  - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: A standard property.  The value specifies the
+          physical address offset and length of the CCSR space
+          registers.
+
+  - fsl,num-laws
+      Usage: required
+      Value type: <u32>
+      Definition: The value specifies the number of local access
+          windows for this device.
+
+=====================================================================
+
+MPX Coherency Module Node
+
+The MPX LAW node represents the region of CCSR space where MCM config
+and error reporting registers exist, this is the second 4k (0x1000)
+of CCSR space.
+
+PROPERTIES
+
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: Must include "fsl,CHIP-mcm", "fsl,mcm" where
+      CHIP is the processor (mpc8641, mpc8610, etc.)
+
+  - reg
+      Usage: required
+      Value type: <prop-encoded-array>
+      Definition: A standard property.  The value specifies the
+          physical address offset and length of the CCSR space
+          registers.
+
+   - interrupts
+      Usage: required
+      Value type: <prop-encoded-array>
+
+   - interrupt-parent
+      Usage: required
+      Value type: <phandle>
+
+=====================================================================
diff --git a/arch/powerpc/boot/dts/mpc8641_hpcn.dts b/arch/powerpc/boot/dts/mpc8641_hpcn.dts
index 51852e6..8bcccd7 100644
--- a/arch/powerpc/boot/dts/mpc8641_hpcn.dts
+++ b/arch/powerpc/boot/dts/mpc8641_hpcn.dts
@@ -117,6 +117,19 @@
 		reg = <0xffe00000 0x00001000>;	// CCSRBAR
 		bus-frequency = <0>;
 
+		mcm-law at 0 {
+			compatible = "fsl,mcm-law";
+			reg = <0x0 0x1000>;
+			fsl,num-laws = <10>;
+		};
+
+		mcm at 1000 {
+			compatible = "fsl,mpc8641-mcm", "fsl,mcm";
+			reg = <0x1000 0x1000>;
+			interrupts = <17 2>;
+			interrupt-parent = <&mpic>;
+		};
+
 		i2c at 3000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
-- 
1.6.0.6