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Commit 1028d4f1 authored by Sebastian Siewior's avatar Sebastian Siewior Committed by Kumar Gala
Browse files

[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: default avatarSebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 370131c3

arch/powerpc/boot/dts/mpc8544ds.dts

+41 −0
Original line number Diff line number Diff line
@@ -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";

arch/powerpc/configs/85xx/mpc8544_ds_defconfig

+16 −1
Original line number Diff line number Diff line
@@ -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

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

+13 −0
Original line number Diff line number Diff line
@@ -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

 */