Merge branch 'next' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx

arch/powerpc/boot/Makefile

@@ -66,7 +66,7 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c
 		fixed-head.S ep88xc.c ep405.c cuboot-c2k.c \
 		cuboot-katmai.c cuboot-rainier.c redboot-8xx.c ep8248e.c \
 		cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
-		virtex405-head.S redboot-83xx.c
+		virtex405-head.S redboot-83xx.c cuboot-sam440ep.c
 src-boot := $(src-wlib) $(src-plat) empty.c
 
 src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -213,6 +213,7 @@ image-$(CONFIG_WALNUT)			+= treeImage.walnut
 # Board ports in arch/powerpc/platform/44x/Kconfig
 image-$(CONFIG_EBONY)			+= treeImage.ebony cuImage.ebony
 image-$(CONFIG_BAMBOO)			+= treeImage.bamboo cuImage.bamboo
+image-$(CONFIG_SAM440EP)		+= cuImage.sam440ep
 image-$(CONFIG_SEQUOIA)			+= cuImage.sequoia
 image-$(CONFIG_RAINIER)			+= cuImage.rainier
 image-$(CONFIG_TAISHAN)			+= cuImage.taishan

arch/powerpc/boot/cuboot-sam440ep.c

+/*
+ * Old U-boot compatibility for Sam440ep based off bamboo.c code
+ * original copyrights below
+ *
+ * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
+ *
+ * Copyright 2007 IBM Corporation
+ *
+ * Based on cuboot-ebony.c
+ *
+ * Modified from cuboot-bamboo.c for sam440ep:
+ * Copyright 2008 Giuseppe Coviello <gicoviello@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ops.h"
+#include "stdio.h"
+#include "44x.h"
+#include "4xx.h"
+#include "cuboot.h"
+
+#define TARGET_4xx
+#define TARGET_44x
+#include "ppcboot.h"
+
+static bd_t bd;
+
+static void sam440ep_fixups(void)
+{
+       unsigned long sysclk = 66666666;
+
+       ibm440ep_fixup_clocks(sysclk, 11059200, 25000000);
+       ibm4xx_sdram_fixup_memsize();
+       ibm4xx_quiesce_eth((u32 *)0xef600e00, (u32 *)0xef600f00);
+       dt_fixup_mac_addresses(&bd.bi_enetaddr, &bd.bi_enet1addr);
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+		unsigned long r6, unsigned long r7)
+{
+	CUBOOT_INIT();
+	platform_ops.fixups = sam440ep_fixups;
+	platform_ops.exit = ibm44x_dbcr_reset;
+	fdt_init(_dtb_start);
+	serial_console_init();
+}

arch/powerpc/boot/dts/sam440ep.dts

+/*
+ * Device Tree Source for ACube Sam440ep  based off bamboo.dts code 
+ * original copyrights below 
+ *
+ * Copyright (c) 2006, 2007 IBM Corp.
+ * Josh Boyer <jwboyer@linux.vnet.ibm.com>
+ *
+ * Modified from bamboo.dts for sam440ep:
+ * Copyright 2008 Giuseppe Coviello <gicoviello@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without
+ * any warranty of any kind, whether express or implied.
+ */
+
+/dts-v1/;
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <1>;
+	model = "acube,sam440ep";
+	compatible = "acube,sam440ep";
+
+	aliases {
+		ethernet0 = &EMAC0;
+		ethernet1 = &EMAC1;
+		serial0 = &UART0;
+		serial1 = &UART1;
+		serial2 = &UART2;
+		serial3 = &UART3;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			model = "PowerPC,440EP";
+			reg = <0>;
+			clock-frequency = <0>; /* Filled in by zImage */
+			timebase-frequency = <0>; /* Filled in by zImage */
+			i-cache-line-size = <32>;
+			d-cache-line-size = <32>;
+			i-cache-size = <32768>;
+			d-cache-size = <32768>;
+			dcr-controller;
+			dcr-access-method = "native";
+		};
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0 0 0>; /* Filled in by zImage */
+	};
+
+	UIC0: interrupt-controller0 {
+		compatible = "ibm,uic-440ep","ibm,uic";
+		interrupt-controller;
+		cell-index = <0>;
+		dcr-reg = <0x0c0 9>;
+		#address-cells = <0>;
+		#size-cells = <0>;
+		#interrupt-cells = <2>;
+	};
+
+	UIC1: interrupt-controller1 {
+		compatible = "ibm,uic-440ep","ibm,uic";
+		interrupt-controller;
+		cell-index = <1>;
+		dcr-reg = <0x0d0 9>;
+		#address-cells = <0>;
+		#size-cells = <0>;
+		#interrupt-cells = <2>;
+		interrupts = <0x1e 4 0x1f 4>; /* cascade */
+		interrupt-parent = <&UIC0>;
+	};
+
+	SDR0: sdr {
+		compatible = "ibm,sdr-440ep";
+		dcr-reg = <0x00e 2>;
+	};
+
+	CPR0: cpr {
+		compatible = "ibm,cpr-440ep";
+		dcr-reg = <0x00c 2>;
+	};
+
+	plb {
+		compatible = "ibm,plb-440ep", "ibm,plb-440gp", "ibm,plb4";
+		#address-cells = <2>;
+		#size-cells = <1>;
+		ranges;
+		clock-frequency = <0>; /* Filled in by zImage */
+
+		SDRAM0: sdram {
+			compatible = "ibm,sdram-440ep", "ibm,sdram-405gp";
+			dcr-reg = <0x010 2>;
+		};
+
+		DMA0: dma {
+			compatible = "ibm,dma-440ep", "ibm,dma-440gp";
+			dcr-reg = <0x100 0x027>;
+		};
+
+		MAL0: mcmal {
+			compatible = "ibm,mcmal-440ep", "ibm,mcmal-440gp", "ibm,mcmal";
+			dcr-reg = <0x180 0x062>;
+			num-tx-chans = <4>;
+			num-rx-chans = <2>;
+			interrupt-parent = <&MAL0>;
+			interrupts = <0 1 2 3 4>;
+			#interrupt-cells = <1>;
+			#address-cells = <0>;
+			#size-cells = <0>;
+			interrupt-map = </*TXEOB*/ 0 &UIC0 10 4
+					/*RXEOB*/ 1 &UIC0 11 4
+					/*SERR*/  2 &UIC1 0 4
+					/*TXDE*/  3 &UIC1 1 4
+					/*RXDE*/  4 &UIC1 2 4>;
+		};
+
+		POB0: opb {
+		  	compatible = "ibm,opb-440ep", "ibm,opb-440gp", "ibm,opb";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			/* Bamboo is oddball in the 44x world and doesn't use the ERPN
+			 * bits.
+			 */
+		  	ranges = <0x00000000 0 0x00000000 0x80000000
+			          0x80000000 0 0x80000000 0x80000000>;
+		  	interrupt-parent = <&UIC1>;
+		  	interrupts = <7 4>;
+		  	clock-frequency = <0>; /* Filled in by zImage */
+
+			EBC0: ebc {
+				compatible = "ibm,ebc-440ep", "ibm,ebc-440gp", "ibm,ebc";
+				dcr-reg = <0x012 2>;
+				#address-cells = <2>;
+				#size-cells = <1>;
+				clock-frequency = <0>; /* Filled in by zImage */
+				interrupts = <5 1>;
+				interrupt-parent = <&UIC1>;
+			};
+
+			UART0: serial@ef600300 {
+		   		device_type = "serial";
+		   		compatible = "ns16550";
+		   		reg = <0xef600300 8>;
+		   		virtual-reg = <0xef600300>;
+		   		clock-frequency = <0>; /* Filled in by zImage */
+		   		current-speed = <0x1c200>;
+		   		interrupt-parent = <&UIC0>;
+		   		interrupts = <0 4>;
+	   		};
+
+			UART1: serial@ef600400 {
+		   		device_type = "serial";
+		   		compatible = "ns16550";
+		   		reg = <0xef600400 8>;
+		   		virtual-reg = <0xef600400>;
+		   		clock-frequency = <0>;
+		   		current-speed = <0>;
+		   		interrupt-parent = <&UIC0>;
+		   		interrupts = <1 4>;
+	   		};
+
+			UART2: serial@ef600500 {
+		   		device_type = "serial";
+		   		compatible = "ns16550";
+		   		reg = <0xef600500 8>;
+		   		virtual-reg = <0xef600500>;
+		   		clock-frequency = <0>;
+		   		current-speed = <0>;
+		   		interrupt-parent = <&UIC0>;
+		   		interrupts = <3 4>;
+	   		};
+
+			UART3: serial@ef600600 {
+		   		device_type = "serial";
+		   		compatible = "ns16550";
+		   		reg = <0xef600600 8>;
+		   		virtual-reg = <0xef600600>;
+		   		clock-frequency = <0>;
+		   		current-speed = <0>;
+		   		interrupt-parent = <&UIC0>;
+		   		interrupts = <4 4>;
+	   		};
+
+			IIC0: i2c@ef600700 {
+                                #address-cells = <1>;
+                                #size-cells = <0>;
+				compatible = "ibm,iic-440ep", "ibm,iic-440gp", "ibm,iic";
+				index = <0>;
+				reg = <0xef600700 0x14>;
+				interrupt-parent = <&UIC0>;
+				interrupts = <2 4>;
+				rtc@68 {
+					compatible = "stm,m41t80";
+					reg = <0x68>;
+				};
+			};
+
+			IIC1: i2c@ef600800 {
+				compatible = "ibm,iic-440ep", "ibm,iic-440gp", "ibm,iic";
+				index = <5>;
+				reg = <0xef600800 0x14>;
+				interrupt-parent = <&UIC0>;
+				interrupts = <7 4>;
+			};
+
+			ZMII0: emac-zmii@ef600d00 {
+				compatible = "ibm,zmii-440ep", "ibm,zmii-440gp", "ibm,zmii";
+				reg = <0xef600d00 0xc>;
+			};
+
+			EMAC0: ethernet@ef600e00 {
+				linux,network-index = <0>;
+				device_type = "network";
+				compatible = "ibm,emac-440ep", "ibm,emac-440gp", "ibm,emac";
+				interrupt-parent = <&UIC1>;
+				interrupts = <0x1c 4 0x1d 4>;
+				reg = <0xef600e00 0x70>;
+				local-mac-address = [000000000000];
+				mal-device = <&MAL0>;
+				mal-tx-channel = <0 1>;
+				mal-rx-channel = <0>;
+				cell-index = <0>;
+				max-frame-size = <0x5dc>;
+				rx-fifo-size = <0x1000>;
+				tx-fifo-size = <0x800>;
+				phy-mode = "rmii";
+				phy-map = <00000000>;
+				zmii-device = <&ZMII0>;
+				zmii-channel = <0>;
+			};
+
+			EMAC1: ethernet@ef600f00 {
+				linux,network-index = <1>;
+				device_type = "network";
+				compatible = "ibm,emac-440ep", "ibm,emac-440gp", "ibm,emac";
+				interrupt-parent = <&UIC1>;
+				interrupts = <0x1e 4 0x1f 4>;
+				reg = <0xef600f00 0x70>;
+				local-mac-address = [000000000000];
+				mal-device = <&MAL0>;
+				mal-tx-channel = <2 3>;
+				mal-rx-channel = <1>;
+				cell-index = <1>;
+				max-frame-size = <0x5dc>;
+				rx-fifo-size = <0x1000>;
+				tx-fifo-size = <0x800>;
+				phy-mode = "rmii";
+				phy-map = <00000000>;
+				zmii-device = <&ZMII0>;
+				zmii-channel = <1>;
+			};
+			usb@ef601000 {
+				compatible = "ohci-be";
+				reg = <0xef601000 0x80>;
+				interrupts = <8 4 9 4>;
+				interrupt-parent = <&UIC1>;
+			};	
+		};
+
+		PCI0: pci@ec000000 {
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb440ep-pci", "ibm,plb-pci";
+			primary;
+			reg = <0 0xeec00000 8	   /* Config space access */
+			       0 0xeed00000 4	   /* IACK */
+			       0 0xeed00000 4	   /* Special cycle */
+			       0 0xef400000 0x40>; /* Internal registers */
+
+			/* Outbound ranges, one memory and one IO,
+			 * later cannot be changed. Chip supports a second
+			 * IO range but we don't use it for now
+			 */
+			ranges = <0x02000000 0 0xa0000000 0 0xa0000000 0 0x20000000
+				  0x01000000 0 0x00000000 0 0xe8000000 0 0x00010000>;
+
+			/* Inbound 2GB range starting at 0 */
+			dma-ranges = <0x42000000 0 0 0 0 0 0x80000000>;
+		};
+	};
+
+	chosen {
+		linux,stdout-path = "/plb/opb/serial@ef600300";
+	};
+};

arch/powerpc/boot/dts/taishan.dts

@@ -186,7 +186,34 @@
 				interrupts = <0x5 0x4>;
 				interrupt-parent = <&UIC1>;
 
-				/* TODO: Add other EBC devices */
+				nor_flash@0,0 {
+					compatible = "cfi-flash";
+					bank-width = <4>;
+					device-width = <2>;
+					reg = <0x0 0x0 0x4000000>;
+					#address-cells = <1>;
+					#size-cells = <1>;
+					partition@0 {
+						label = "kernel";
+						reg = <0x0 0x180000>;
+					};
+					partition@180000 {
+						label = "root";
+						reg = <0x180000 0x200000>;
+					};
+					partition@380000 {
+						label = "user";
+						reg = <0x380000 0x3bc0000>;
+					};
+					partition@3f40000 {
+						label = "env";
+						reg = <0x3f40000 0x80000>;
+					};
+					partition@3fc0000 {
+						label = "u-boot";
+						reg = <0x3fc0000 0x40000>;
+					};
+				};
 			};
 
 

arch/powerpc/configs/44x/taishan_defconfig

@@ -348,7 +348,83 @@ CONFIG_FW_LOADER=y
 # CONFIG_SYS_HYPERVISOR is not set
 CONFIG_CONNECTOR=y
 CONFIG_PROC_EVENTS=y
-# CONFIG_MTD is not set
+CONFIG_MTD=y
+# CONFIG_MTD_DEBUG is not set
+# CONFIG_MTD_CONCAT is not set
+CONFIG_MTD_PARTITIONS=y
+# CONFIG_MTD_REDBOOT_PARTS is not set
+CONFIG_MTD_CMDLINE_PARTS=y
+
+#
+# User Modules And Translation Layers
+#
+CONFIG_MTD_CHAR=y
+# CONFIG_MTD_BLKDEVS is not set
+# CONFIG_MTD_BLOCK is not set
+# CONFIG_MTD_BLOCK_RO is not set
+# CONFIG_FTL is not set
+# CONFIG_NFTL is not set
+# CONFIG_INFTL is not set
+# CONFIG_RFD_FTL is not set
+# CONFIG_SSFDC is not set
+# CONFIG_MTD_OOPS is not set
+
+#
+# RAM/ROM/Flash chip drivers
+#
+CONFIG_MTD_CFI=y
+# CONFIG_MTD_JEDECPROBE is not set
+CONFIG_MTD_GEN_PROBE=y
+# CONFIG_MTD_CFI_ADV_OPTIONS is not set
+CONFIG_MTD_MAP_BANK_WIDTH_1=y
+CONFIG_MTD_MAP_BANK_WIDTH_2=y
+CONFIG_MTD_MAP_BANK_WIDTH_4=y
+# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
+CONFIG_MTD_CFI_I1=y
+CONFIG_MTD_CFI_I2=y
+# CONFIG_MTD_CFI_I4 is not set
+# CONFIG_MTD_CFI_I8 is not set
+# CONFIG_MTD_CFI_INTELEXT is not set
+CONFIG_MTD_CFI_AMDSTD=y
+# CONFIG_MTD_CFI_STAA is not set
+CONFIG_MTD_CFI_UTIL=y
+# CONFIG_MTD_RAM is not set
+# CONFIG_MTD_ROM is not set
+# CONFIG_MTD_ABSENT is not set
+
+#
+# Mapping drivers for chip access
+#
+# CONFIG_MTD_COMPLEX_MAPPINGS is not set
+# CONFIG_MTD_PHYSMAP is not set
+CONFIG_MTD_PHYSMAP_OF=y
+# CONFIG_MTD_INTEL_VR_NOR is not set
+# CONFIG_MTD_PLATRAM is not set
+
+#
+# Self-contained MTD device drivers
+#
+# CONFIG_MTD_PMC551 is not set
+# CONFIG_MTD_SLRAM is not set
+# CONFIG_MTD_PHRAM is not set
+# CONFIG_MTD_MTDRAM is not set
+# CONFIG_MTD_BLOCK2MTD is not set
+
+#
+# Disk-On-Chip Device Drivers
+#
+# CONFIG_MTD_DOC2000 is not set
+# CONFIG_MTD_DOC2001 is not set
+# CONFIG_MTD_DOC2001PLUS is not set
+# CONFIG_MTD_NAND is not set
+# CONFIG_MTD_ONENAND is not set
+
+#
+# UBI - Unsorted block images
+#
+# CONFIG_MTD_UBI is not set
 CONFIG_OF_DEVICE=y
 # CONFIG_PARPORT is not set
 CONFIG_BLK_DEV=y
@@ -660,6 +736,7 @@ CONFIG_TMPFS=y
 # CONFIG_BEFS_FS is not set
 # CONFIG_BFS_FS is not set
 # CONFIG_EFS_FS is not set
+# CONFIG_JFFS2_FS is not set
 CONFIG_CRAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_MINIX_FS is not set

arch/powerpc/kernel/cpu_setup_44x.S

@@ -33,6 +33,7 @@ _GLOBAL(__setup_cpu_440grx)
 	mtlr	r4
 	blr
 _GLOBAL(__setup_cpu_460ex)
+_GLOBAL(__setup_cpu_460gt)
 	b	__init_fpu_44x
 _GLOBAL(__setup_cpu_440gx)
 _GLOBAL(__setup_cpu_440spe)

arch/powerpc/kernel/cputable.c

@@ -37,6 +37,7 @@ extern void __setup_cpu_440gx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440grx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440spe(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_460ex(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_460gt(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec);
@@ -1427,9 +1428,10 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pvr_value		= 0x13020000,
 		.cpu_name		= "460GT",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= COMMON_USER_BOOKE,
+		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.cpu_setup		= __setup_cpu_460gt,
 		.machine_check		= machine_check_440A,
 		.platform		= "ppc440",
 	},

arch/powerpc/platforms/44x/Kconfig

@@ -17,6 +17,15 @@ config EBONY
 	help
 	  This option enables support for the IBM PPC440GP evaluation board.
 
+config SAM440EP
+        bool "Sam440ep"
+	depends on 44x
+        default n
+        select 440EP
+        select PCI
+        help
+          This option enables support for the ACube Sam440ep board.
+
 config SEQUOIA
 	bool "Sequoia"
 	depends on 44x

arch/powerpc/platforms/44x/Makefile

@@ -3,6 +3,7 @@ obj-$(CONFIG_EBONY)	+= ebony.o
 obj-$(CONFIG_TAISHAN)	+= taishan.o
 obj-$(CONFIG_BAMBOO)	+= bamboo.o
 obj-$(CONFIG_YOSEMITE)	+= bamboo.o
+obj-$(CONFIG_SAM440EP) 	+= sam440ep.o
 obj-$(CONFIG_SEQUOIA)	+= sequoia.o
 obj-$(CONFIG_KATMAI)	+= katmai.o
 obj-$(CONFIG_RAINIER)	+= rainier.o

arch/powerpc/platforms/44x/sam440ep.c

+/*
+ * Sam440ep board specific routines based off bamboo.c code
+ * original copyrights below
+ *
+ * Wade Farnsworth <wfarnsworth@mvista.com>
+ * Copyright 2004 MontaVista Software Inc.
+ *
+ * Rewritten and ported to the merged powerpc tree:
+ * Josh Boyer <jwboyer@linux.vnet.ibm.com>
+ * Copyright 2007 IBM Corporation
+ *
+ * Modified from bamboo.c for sam440ep:
+ * Copyright 2008 Giuseppe Coviello <gicoviello@gmail.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <linux/init.h>
+#include <linux/of_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/udbg.h>
+#include <asm/time.h>
+#include <asm/uic.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc4xx.h>
+#include <linux/i2c.h>
+
+static __initdata struct of_device_id sam440ep_of_bus[] = {
+	{ .compatible = "ibm,plb4", },
+	{ .compatible = "ibm,opb", },
+	{ .compatible = "ibm,ebc", },
+	{},
+};
+
+static int __init sam440ep_device_probe(void)
+{
+	of_platform_bus_probe(NULL, sam440ep_of_bus, NULL);
+
+	return 0;
+}
+machine_device_initcall(sam440ep, sam440ep_device_probe);
+
+static int __init sam440ep_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	if (!of_flat_dt_is_compatible(root, "acube,sam440ep"))
+		return 0;
+
+	ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+
+	return 1;
+}
+
+define_machine(sam440ep) {
+	.name 			= "Sam440ep",
+	.probe 			= sam440ep_probe,
+	.progress 		= udbg_progress,
+	.init_IRQ 		= uic_init_tree,
+	.get_irq 		= uic_get_irq,
+	.restart		= ppc4xx_reset_system,
+	.calibrate_decr 	= generic_calibrate_decr,
+};
+
+static struct i2c_board_info sam440ep_rtc_info = {
+	.type = "m41st85",
+	.addr = 0x68,
+	.irq = -1,
+};
+
+static int sam440ep_setup_rtc(void)
+{
+	return i2c_register_board_info(0, &sam440ep_rtc_info, 1);
+}
+machine_device_initcall(sam440ep, sam440ep_setup_rtc);

arch/powerpc/platforms/44x/warp-nand.c

@@ -94,8 +94,7 @@ static struct platform_nand_chip warp_nand_chip0 = {
 static struct platform_device warp_nand_device = {
 	.name = "ndfc-chip",
 	.id = 0,
-	.num_resources = 1,
-	.resource = &warp_ndfc,
+	.num_resources = 0,
 	.dev = {
 		.platform_data = &warp_nand_chip0,
 		.parent = &warp_ndfc_device.dev,

arch/powerpc/sysdev/indirect_pci.c

@@ -123,6 +123,12 @@ indirect_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
 			(bus->number == hose->first_busno))
 		val &= 0xffffff00;
 
+	/* Workaround for PCI_28 Errata in 440EPx/GRx */
+	if ((hose->indirect_type & PPC_INDIRECT_TYPE_BROKEN_MRM) &&
+			offset == PCI_CACHE_LINE_SIZE) {
+		val = 0;
+	}
+
 	/*
 	 * Note: the caller has already checked that offset is
 	 * suitably aligned and that len is 1, 2 or 4.

arch/powerpc/sysdev/ppc4xx_pci.c

@@ -75,6 +75,11 @@ static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
 	    !of_device_is_compatible(hose->dn, "ibm,plb-pci"))
 		return;
 
+	if (of_device_is_compatible(hose->dn, "ibm,plb440epx-pci") ||
+		of_device_is_compatible(hose->dn, "ibm,plb440grx-pci")) {
+		hose->indirect_type |= PPC_INDIRECT_TYPE_BROKEN_MRM;
+	}
+
 	/* Hide the PCI host BARs from the kernel as their content doesn't
 	 * fit well in the resource management
 	 */
@@ -1634,6 +1639,15 @@ static void __init ppc4xx_probe_pciex_bridge(struct device_node *np)
 	}
 	port = &ppc4xx_pciex_ports[portno];
 	port->index = portno;
+
+	/*
+	 * Check if device is enabled
+	 */
+	if (!of_device_is_available(np)) {
+		printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index);
+		return;
+	}
+
 	port->node = of_node_get(np);
 	pval = of_get_property(np, "sdr-base", NULL);
 	if (pval == NULL) {

include/asm-powerpc/pci-bridge.h

@@ -92,12 +92,15 @@ struct pci_controller {
 	 *   anything but the PHB.  Only allow talking to the PHB if this is
 	 *   set.
 	 *  BIG_ENDIAN - cfg_addr is a big endian register
+	 *  BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
+	 *   the PLB4.  Effectively disable MRM commands by setting this.
 	 */
 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE		0x00000001
 #define PPC_INDIRECT_TYPE_EXT_REG		0x00000002
 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS	0x00000004
 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK		0x00000008
 #define PPC_INDIRECT_TYPE_BIG_ENDIAN		0x00000010
+#define PPC_INDIRECT_TYPE_BROKEN_MRM		0x00000020
 	u32 indirect_type;
 #endif	/* !CONFIG_PPC64 */
 	/* Currently, we limit ourselves to 1 IO range and 3 mem