[POWERPC] mpc512x: Basic platform support

512x is very similar to 83xx and most
of this is patterned after code from 83xx.

New platform:
    changed:
	arch/powerpc/Kconfig
	arch/powerpc/platforms/Kconfig
	arch/powerpc/platforms/Kconfig.cputype
	arch/powerpc/platforms/Makefile
    new:
	arch/powerpc/platforms/512x/*
	include/asm-powerpc/mpc512x.h

Signed-off-by: John Rigby <jrigby@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

6 files changed, 133 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/512x/Kconfig b/arch/powerpc/platforms/512x/Kconfig
new file mode 100644
index 000000000000..c6fa49e23dc0
--- /dev/null
+++ b/arch/powerpc/platforms/512x/Kconfig
@@ -0,0 +1,20 @@
+config PPC_MPC512x
+	bool
+	select FSL_SOC
+	select IPIC
+	default n
+
+config PPC_MPC5121
+	bool
+	select PPC_MPC512x
+	default n
+
+config MPC5121_ADS
+	bool "Freescale MPC5121E ADS"
+	depends on PPC_MULTIPLATFORM && PPC32
+	select DEFAULT_UIMAGE
+	select WANT_DEVICE_TREE
+	select PPC_MPC5121
+	help
+	  This option enables support for the MPC5121E ADS board.
+	default n
diff --git a/arch/powerpc/platforms/512x/Makefile b/arch/powerpc/platforms/512x/Makefile
new file mode 100644
index 000000000000..232c89f2039a
--- /dev/null
+++ b/arch/powerpc/platforms/512x/Makefile
@@ -0,0 +1,4 @@
+#
+# Makefile for the Freescale PowerPC 512x linux kernel.
+#
+obj-$(CONFIG_MPC5121_ADS)	+= mpc5121_ads.o
diff --git a/arch/powerpc/platforms/512x/mpc5121_ads.c b/arch/powerpc/platforms/512x/mpc5121_ads.c
new file mode 100644
index 000000000000..50bd3a319022
--- /dev/null
+++ b/arch/powerpc/platforms/512x/mpc5121_ads.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: John Rigby, <jrigby@freescale.com>, Thur Mar 29 2007
+ *
+ * Description:
+ * MPC5121 ADS board setup
+ *
+ * This 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/kernel.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/ipic.h>
+#include <asm/prom.h>
+#include <asm/time.h>
+
+/**
+ * 	mpc512x_find_ips_freq - Find the IPS bus frequency for a device
+ * 	@node:	device node
+ *
+ * 	Returns IPS bus frequency, or 0 if the bus frequency cannot be found.
+ */
+unsigned long
+mpc512x_find_ips_freq(struct device_node *node)
+{
+	struct device_node *np;
+	const unsigned int *p_ips_freq = NULL;
+
+	of_node_get(node);
+	while (node) {
+		p_ips_freq = of_get_property(node, "bus-frequency", NULL);
+		if (p_ips_freq)
+			break;
+
+		np = of_get_parent(node);
+		of_node_put(node);
+		node = np;
+	}
+	if (node)
+		of_node_put(node);
+
+	return p_ips_freq ? *p_ips_freq : 0;
+}
+EXPORT_SYMBOL(mpc512x_find_ips_freq);
+
+static struct of_device_id __initdata of_bus_ids[] = {
+	{ .name = "soc", },
+	{ .name = "localbus", },
+	{},
+};
+
+static void __init mpc5121_ads_declare_of_platform_devices(void)
+{
+	/* Find every child of the SOC node and add it to of_platform */
+	if (of_platform_bus_probe(NULL, of_bus_ids, NULL))
+		printk(KERN_ERR __FILE__ ": "
+			"Error while probing of_platform bus\n");
+}
+
+static void __init mpc5121_ads_init_IRQ(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
+	if (!np)
+		return;
+
+	ipic_init(np, 0);
+	of_node_put(np);
+
+	/*
+	 * Initialize the default interrupt mapping priorities,
+	 * in case the boot rom changed something on us.
+	 */
+	ipic_set_default_priority();
+}
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init mpc5121_ads_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	return of_flat_dt_is_compatible(root, "fsl,mpc5121ads");
+}
+
+define_machine(mpc5121_ads) {
+	.name			= "MPC5121 ADS",
+	.probe			= mpc5121_ads_probe,
+	.init			= mpc5121_ads_declare_of_platform_devices,
+	.init_IRQ		= mpc5121_ads_init_IRQ,
+	.get_irq		= ipic_get_irq,
+	.calibrate_decr		= generic_calibrate_decr,
+};
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index fdce10c4f074..e2c952619805 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -41,6 +41,7 @@ config CLASSIC32
 source "arch/powerpc/platforms/pseries/Kconfig"
 source "arch/powerpc/platforms/iseries/Kconfig"
 source "arch/powerpc/platforms/chrp/Kconfig"
+source "arch/powerpc/platforms/512x/Kconfig"
 source "arch/powerpc/platforms/52xx/Kconfig"
 source "arch/powerpc/platforms/powermac/Kconfig"
 source "arch/powerpc/platforms/prep/Kconfig"
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 7fc41104d53e..51030ab2a023 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -14,7 +14,7 @@ choice
 	  There are five families of 32 bit PowerPC chips supported.
 	  The most common ones are the desktop and server CPUs (601, 603,
 	  604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
-	  embedded 52xx/82xx/83xx/86xx counterparts.
+	  embedded 512x/52xx/82xx/83xx/86xx counterparts.
 	  The other embeeded parts, namely 4xx, 8xx, e200 (55xx) and e500
 	  (85xx) each form a family of their own that is not compatible
 	  with the others.
@@ -22,7 +22,7 @@ choice
 	  If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
 
 config 6xx
-	bool "52xx/6xx/7xx/74xx/82xx/83xx/86xx"
+	bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
 	select PPC_FPU
 
 config PPC_85xx
@@ -221,7 +221,7 @@ config NR_CPUS
 
 config NOT_COHERENT_CACHE
 	bool
-	depends on 4xx || 8xx || E200
+	depends on 4xx || 8xx || E200 || PPC_MPC512x
 	default y
 
 config CHECK_CACHE_COHERENCY
diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
index 6d9079da5f5a..a984894466d9 100644
--- a/arch/powerpc/platforms/Makefile
+++ b/arch/powerpc/platforms/Makefile
@@ -11,6 +11,7 @@ endif
 obj-$(CONFIG_PPC_CHRP)		+= chrp/
 obj-$(CONFIG_40x)		+= 40x/
 obj-$(CONFIG_44x)		+= 44x/
+obj-$(CONFIG_PPC_MPC512x)	+= 512x/
 obj-$(CONFIG_PPC_MPC52xx)	+= 52xx/
 obj-$(CONFIG_PPC_8xx)		+= 8xx/
 obj-$(CONFIG_PPC_82xx)		+= 82xx/