[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 <bigeasy@linutronix.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

3 files changed, 70 insertions, 1 deletions

diff --git a/arch/powerpc/boot/dts/mpc8544ds.dts b/arch/powerpc/boot/dts/mpc8544ds.dts
index 688af9d06382..131ffaae2b5d 100644
--- a/arch/powerpc/boot/dts/mpc8544ds.dts
+++ b/arch/powerpc/boot/dts/mpc8544ds.dts
@@ -116,6 +116,47 @@
                         };
                 };
 
+                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";
diff --git a/arch/powerpc/configs/85xx/mpc8544_ds_defconfig b/arch/powerpc/configs/85xx/mpc8544_ds_defconfig
index 418bcdb5f919..a9f113b243ae 100644
--- a/arch/powerpc/configs/85xx/mpc8544_ds_defconfig
+++ b/arch/powerpc/configs/85xx/mpc8544_ds_defconfig
@@ -162,6 +162,7 @@ CONFIG_MPC85xx=y
 # 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
@@ -202,6 +203,7 @@ CONFIG_PREEMPT_NONE=y
 # 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
@@ -1255,7 +1257,19 @@ CONFIG_RTC_DRV_CMOS=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
@@ -1447,6 +1461,7 @@ CONFIG_PLIST=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT=y
 CONFIG_HAS_DMA=y
+CONFIG_HAVE_LMB=y
 
 #
 # Kernel hacking
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
index 2865d019afc3..dfd8b4ad9b28 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
@@ -19,6 +19,7 @@
 #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>
@@ -183,6 +184,18 @@ static int __init mpc8544_ds_probe(void)
         }
 }
 
+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
  */