powerpc/512x: add a device tree binding for LocalPlus Bus FIFO

Add a device tree binding for Freescale MPC512x LocalPlus Bus FIFO and
introduce the document describing that binding.

Signed-off-by: Alexander Popov <alex.popov@linux.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>

3 files changed, 40 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/powerpc/fsl/mpc512x_lpbfifo.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpc512x_lpbfifo.txt
new file mode 100644
index 000000000000..b3b392fe1f61
--- /dev/null
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mpc512x_lpbfifo.txt
@@ -0,0 +1,21 @@
+Freescale MPC512x LocalPlus Bus FIFO (called SCLPC in the Reference Manual)
+
+Required properties:
+- compatible: should be "fsl,mpc512x-lpbfifo";
+- reg: should contain the offset and length of SCLPC register set;
+- interrupts: should contain the interrupt specifier for SCLPC; syntax of an
+    interrupt client node is described in interrupt-controller/interrupts.txt;
+- dmas: should contain the DMA specifier for SCLPC as described at
+    dma/dma.txt and dma/mpc512x-dma.txt;
+- dma-names: should be "rx-tx";
+
+Example:
+
+        sclpc@10100 {
+                compatible = "fsl,mpc512x-lpbfifo";
+                reg = <0x10100 0x50>;
+                interrupts = <7 0x8>;
+                dmas = <&dma0 26>;
+                dma-names = "rx-tx";
+        };
+
diff --git a/arch/powerpc/boot/dts/mpc5121.dtsi b/arch/powerpc/boot/dts/mpc5121.dtsi
index 7f9d14f5c4da..a015e450437a 100644
--- a/arch/powerpc/boot/dts/mpc5121.dtsi
+++ b/arch/powerpc/boot/dts/mpc5121.dtsi
@@ -77,7 +77,6 @@
                 #address-cells = <2>;
                 #size-cells = <1>;
                 reg = <0x80000020 0x40>;
-                interrupts = <7 0x8>;
                 ranges = <0x0 0x0 0xfc000000 0x04000000>;
         };
 
@@ -329,7 +328,15 @@
                 /* LocalPlus controller */
                 lpc@10000 {
                         compatible = "fsl,mpc5121-lpc";
-                        reg = <0x10000 0x200>;
+                        reg = <0x10000 0x100>;
+                };
+
+                sclpc@10100 {
+                        compatible = "fsl,mpc512x-lpbfifo";
+                        reg = <0x10100 0x50>;
+                        interrupts = <7 0x8>;
+                        dmas = <&dma0 26>;
+                        dma-names = "rx-tx";
                 };
 
                 pata@10200 {
diff --git a/arch/powerpc/boot/dts/mpc5125twr.dts b/arch/powerpc/boot/dts/mpc5125twr.dts
index e4f297471748..898eb58e49dd 100644
--- a/arch/powerpc/boot/dts/mpc5125twr.dts
+++ b/arch/powerpc/boot/dts/mpc5125twr.dts
@@ -246,6 +246,14 @@
                         status = "disabled";
                 };
 
+                sclpc@10100 {
+                        compatible = "fsl,mpc512x-lpbfifo";
+                        reg = <0x10100 0x50>;
+                        interrupts = <7 0x8>;
+                        dmas = <&dma0 26>;
+                        dma-names = "rx-tx";
+                };
+
                 // 5125 PSCs are not 52xx or 5121 PSC compatible
                 // PSC1 uart0 aka ttyPSC0
                 serial@11100 {
@@ -279,10 +287,11 @@
                         clock-names = "ipg";
                 };
 
-                dma@14000 {
+                dma0: dma@14000 {
                         compatible = "fsl,mpc5121-dma"; // BSP name: "mpc512x-dma2"
                         reg = <0x14000 0x1800>;
                         interrupts = <65 0x8>;
+                        #dma-cells = <1>;
                 };
         };
 };