[POWERPC] 85xx: Enable DMA engine on the MPC8544 DS

Add the device tree node for the DMA engine on 8544, publish
the device and enable the driver in the defconfig.

Signed-off-by: Sebastian Siewior <[e-mail]>
Signed-off-by: Kumar Gala <[e-mail]>

arch/powerpc/boot/dts/mpc8544ds.dts

···
 			};
 		};
 
+		dma@21300 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "fsl,mpc8544-dma", "fsl,eloplus-dma";
+			reg = <21300 4>;
+			ranges = <0 21100 200>;
+			cell-index = <0>;
+			dma-channel@0 {
+				compatible = "fsl,mpc8544-dma-channel",
+						"fsl,eloplus-dma-channel";
+				reg = <0 80>;
+				cell-index = <0>;
+				interrupt-parent = <&mpic>;
+				interrupts = <14 2>;
+			};
+			dma-channel@80 {
+				compatible = "fsl,mpc8544-dma-channel",
+						"fsl,eloplus-dma-channel";
+				reg = <80 80>;
+				cell-index = <1>;
+				interrupt-parent = <&mpic>;
+				interrupts = <15 2>;
+			};
+			dma-channel@100 {
+				compatible = "fsl,mpc8544-dma-channel",
+						"fsl,eloplus-dma-channel";
+				reg = <100 80>;
+				cell-index = <2>;
+				interrupt-parent = <&mpic>;
+				interrupts = <16 2>;
+			};
+			dma-channel@180 {
+				compatible = "fsl,mpc8544-dma-channel",
+						"fsl,eloplus-dma-channel";
+				reg = <180 80>;
+				cell-index = <3>;
+				interrupt-parent = <&mpic>;
+				interrupts = <17 2>;
+			};
+		};
+
 		enet0: ethernet@24000 {
 			cell-index = <0>;
 			device_type = "network";

arch/powerpc/configs/85xx/mpc8544_ds_defconfig

···
 # CONFIG_MPC85xx_CDS is not set
 # CONFIG_MPC85xx_MDS is not set
 CONFIG_MPC85xx_DS=y
+# CONFIG_KSI8560 is not set
 # CONFIG_STX_GP3 is not set
 # CONFIG_TQM8540 is not set
 # CONFIG_TQM8541 is not set
···
 # CONFIG_PREEMPT is not set
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
+CONFIG_FORCE_MAX_ZONEORDER=11
 CONFIG_MATH_EMULATION=y
 # CONFIG_IOMMU_HELPER is not set
 CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
···
 #
 # on-CPU RTC drivers
 #
-# CONFIG_DMADEVICES is not set
+CONFIG_DMADEVICES=y
+
+#
+# DMA Devices
+#
+CONFIG_FSL_DMA=y
+# CONFIG_FSL_DMA_SELFTEST is not set
+CONFIG_DMA_ENGINE=y
+
+#
+# DMA Clients
+#
+# CONFIG_NET_DMA is not set
 
 #
 # Userspace I/O
···
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT=y
 CONFIG_HAS_DMA=y
+CONFIG_HAVE_LMB=y
 
 #
 # Kernel hacking

arch/powerpc/platforms/85xx/mpc85xx_ds.c

···
 #include <linux/delay.h>
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
+#include <linux/of_platform.h>
 
 #include <asm/system.h>
 #include <asm/time.h>
···
 		return 0;
 	}
 }
+
+static struct of_device_id mpc85xxds_ids[] = {
+	{ .type = "soc", },
+	{ .compatible = "soc", },
+	{},
+};
+
+static int __init mpc85xxds_publish_devices(void)
+{
+	return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
+}
+machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
 
 /*
  * Called very early, device-tree isn't unflattened