3 files changed, 93 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 249ba01c6674..97c634c8f9da 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -127,6 +127,13 @@ config XILINX_VIRTEX440_GENERIC_BOARD
           Most Virtex 5 designs should use this unless it needs to do some
           special configuration at board probe time.
 
+config PPC44x_SIMPLE
+        bool "Simple PowerPC 44x board support"
+        depends on 44x
+        default n
+        help
+          This option enables the simple PowerPC 44x platform support.
+
 # 44x specific CPU modules, selected based on the board above.
 config 440EP
         bool
diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
index 8d0b1a192d62..73c1df5bc051 100644
--- a/arch/powerpc/platforms/44x/Makefile
+++ b/arch/powerpc/platforms/44x/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_44x)       := misc_44x.o idle.o
+obj-$(CONFIG_PPC44x_SIMPLE) += ppc44x_simple.o
 obj-$(CONFIG_EBONY)     += ebony.o
 obj-$(CONFIG_TAISHAN)   += taishan.o
 obj-$(CONFIG_BAMBOO)    += bamboo.o
diff --git a/arch/powerpc/platforms/44x/ppc44x_simple.c b/arch/powerpc/platforms/44x/ppc44x_simple.c
new file mode 100644
index 000000000000..32b0535f29fe
--- /dev/null
+++ b/arch/powerpc/platforms/44x/ppc44x_simple.c
@@ -0,0 +1,85 @@
+/*
+ * Generic PowerPC 44x platform support
+ *
+ * Copyright 2008 IBM Corporation
+ *
+ * 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; version 2 of the License.
+ *
+ * This implements simple platform support for PowerPC 44x chips.  This is
+ * mostly used for eval boards or other simple and "generic" 44x boards.  If
+ * your board has custom functions or hardware, then you will likely want to
+ * implement your own board.c file to accommodate it.
+ */
+
+#include <asm/machdep.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc4xx.h>
+#include <asm/prom.h>
+#include <asm/time.h>
+#include <asm/udbg.h>
+#include <asm/uic.h>
+
+#include <linux/init.h>
+#include <linux/of_platform.h>
+
+static __initdata struct of_device_id ppc44x_of_bus[] = {
+        { .compatible = "ibm,plb4", },
+        { .compatible = "ibm,opb", },
+        { .compatible = "ibm,ebc", },
+        { .compatible = "simple-bus", },
+        {},
+};
+
+static int __init ppc44x_device_probe(void)
+{
+        of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
+
+        return 0;
+}
+machine_device_initcall(ppc44x_simple, ppc44x_device_probe);
+
+/* This is the list of boards that can be supported by this simple
+ * platform code.  This does _not_ mean the boards are compatible,
+ * as they most certainly are not from a device tree perspective.
+ * However, their differences are handled by the device tree and the
+ * drivers and therefore they don't need custom board support files.
+ *
+ * Again, if your board needs to do things differently then create a
+ * board.c file for it rather than adding it to this list.
+ */
+static char *board[] __initdata = {
+        "amcc,bamboo",
+        "amcc,cayonlands",
+        "ibm,ebony",
+        "amcc,katmai",
+        "amcc,rainier",
+        "amcc,sequoia",
+        "amcc,taishan"
+};
+
+static int __init ppc44x_probe(void)
+{
+        unsigned long root = of_get_flat_dt_root();
+        int i = 0;
+
+        for (i = 0; i < ARRAY_SIZE(board); i++) {
+                if (of_flat_dt_is_compatible(root, board[i])) {
+                        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+                        return 1;
+                }
+        }
+
+        return 0;
+}
+
+define_machine(ppc44x_simple) {
+        .name = "PowerPC 44x Platform",
+        .probe = ppc44x_probe,
+        .progress = udbg_progress,
+        .init_IRQ = uic_init_tree,
+        .get_irq = uic_get_irq,
+        .restart = ppc4xx_reset_system,
+        .calibrate_decr = generic_calibrate_decr,
+};