powerpc/mpc5121: Add generic board support for MPC5121 platforms

Move shared code from mpc5121_ads.c to new file mpc512x_shared.c
- mpc512x_find_ips_freq -> unchanged
- contents of mpc5121_ads_init_IRQ -> mpc512x_init_IRQ
  - looking for fsl,mpc5121-ipic instead of fsl,ipic
- mpc5121_ads_declare_of_platform_devices -> mpc5121_declare_of_platform_devices
  - and use compatible for lookup instead of node name

Add new generic board setup mpc5121_generic.c

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

6 files changed, 177 insertions, 63 deletions

diff --git a/arch/powerpc/platforms/512x/Kconfig b/arch/powerpc/platforms/512x/Kconfig
index 162af067d12..5d72dc3435a 100644
--- a/arch/powerpc/platforms/512x/Kconfig
+++ b/arch/powerpc/platforms/512x/Kconfig
@@ -3,12 +3,10 @@ config PPC_MPC512x
         select FSL_SOC
         select IPIC
         select PPC_CLOCK
-        default n
 
 config PPC_MPC5121
         bool
         select PPC_MPC512x
-        default n
 
 config MPC5121_ADS
         bool "Freescale MPC5121E ADS"
@@ -17,4 +15,15 @@ config MPC5121_ADS
         select PPC_MPC5121
         help
           This option enables support for the MPC5121E ADS board.
-        default n
+
+config MPC5121_GENERIC
+        bool "Generic support for simple MPC5121 based boards"
+        depends on PPC_MULTIPLATFORM && PPC32
+        select DEFAULT_UIMAGE
+        select PPC_MPC5121
+        help
+          This option enables support for simple MPC5121 based boards
+          which do not need custom platform specific setup.
+
+          Compatible boards include:  Protonic LVT base boards (ZANMCU
+          and VICVT2).
diff --git a/arch/powerpc/platforms/512x/Makefile b/arch/powerpc/platforms/512x/Makefile
index 90910c1f725..8090e222a2d 100644
--- a/arch/powerpc/platforms/512x/Makefile
+++ b/arch/powerpc/platforms/512x/Makefile
@@ -1,5 +1,6 @@
 #
 # Makefile for the Freescale PowerPC 512x linux kernel.
 #
-obj-y                           += clock.o
+obj-y                           += clock.o mpc512x_shared.o
 obj-$(CONFIG_MPC5121_ADS)       += mpc5121_ads.o
+obj-$(CONFIG_MPC5121_GENERIC)   += mpc5121_generic.o
diff --git a/arch/powerpc/platforms/512x/mpc5121_ads.c b/arch/powerpc/platforms/512x/mpc5121_ads.c
index 50bd3a31902..3ec9ca34d8e 100644
--- a/arch/powerpc/platforms/512x/mpc5121_ads.c
+++ b/arch/powerpc/platforms/512x/mpc5121_ads.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+ * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc. All rights reserved.
  *
  * Author: John Rigby, <jrigby@freescale.com>, Thur Mar 29 2007
  *
@@ -15,7 +15,6 @@
 
 #include <linux/kernel.h>
 #include <linux/io.h>
-#include <linux/irq.h>
 #include <linux/of_platform.h>
 
 #include <asm/machdep.h>
@@ -23,65 +22,11 @@
 #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");
-}
+#include "mpc512x.h"
 
 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();
+        mpc512x_init_IRQ();
 }
 
 /*
@@ -97,7 +42,8 @@ static int __init mpc5121_ads_probe(void)
 define_machine(mpc5121_ads) {
         .name                   = "MPC5121 ADS",
         .probe                  = mpc5121_ads_probe,
-        .init                   = mpc5121_ads_declare_of_platform_devices,
+        .setup_arch             = mpc5121_ads_setup_arch,
+        .init                   = mpc512x_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/512x/mpc5121_generic.c b/arch/powerpc/platforms/512x/mpc5121_generic.c
new file mode 100644
index 00000000000..2479de9e2d1
--- /dev/null
+++ b/arch/powerpc/platforms/512x/mpc5121_generic.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2007,2008 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: John Rigby, <jrigby@freescale.com>
+ *
+ * Description:
+ * MPC5121 SoC 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/of_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/ipic.h>
+#include <asm/prom.h>
+#include <asm/time.h>
+
+#include "mpc512x.h"
+
+/*
+ * list of supported boards
+ */
+static char *board[] __initdata = {
+        "prt,prtlvt",
+        NULL
+};
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init mpc5121_generic_probe(void)
+{
+        unsigned long node = of_get_flat_dt_root();
+        int i = 0;
+
+        while (board[i]) {
+                if (of_flat_dt_is_compatible(node, board[i]))
+                        break;
+                i++;
+        }
+
+        return board[i] != NULL;
+}
+
+define_machine(mpc5121_generic) {
+        .name                   = "MPC5121 generic",
+        .probe                  = mpc5121_generic_probe,
+        .init                   = mpc512x_declare_of_platform_devices,
+        .init_IRQ               = mpc512x_init_IRQ,
+        .get_irq                = ipic_get_irq,
+        .calibrate_decr         = generic_calibrate_decr,
+};
diff --git a/arch/powerpc/platforms/512x/mpc512x.h b/arch/powerpc/platforms/512x/mpc512x.h
new file mode 100644
index 00000000000..9c03693cb00
--- /dev/null
+++ b/arch/powerpc/platforms/512x/mpc512x.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * 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.
+ *
+ * Prototypes for MPC512x shared code
+ */
+
+#ifndef __MPC512X_H__
+#define __MPC512X_H__
+extern unsigned long mpc512x_find_ips_freq(struct device_node *node);
+extern void __init mpc512x_init_IRQ(void);
+void __init mpc512x_declare_of_platform_devices(void);
+#endif                          /* __MPC512X_H__ */
diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c b/arch/powerpc/platforms/512x/mpc512x_shared.c
new file mode 100644
index 00000000000..d8cd579f319
--- /dev/null
+++ b/arch/powerpc/platforms/512x/mpc512x_shared.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2007,2008 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: John Rigby <jrigby@freescale.com>
+ *
+ * Description:
+ * MPC512x Shared code
+ *
+ * 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>
+
+#include "mpc512x.h"
+
+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);
+
+void __init mpc512x_init_IRQ(void)
+{
+        struct device_node *np;
+
+        np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-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();
+}
+
+/*
+ * Nodes to do bus probe on, soc and localbus
+ */
+static struct of_device_id __initdata of_bus_ids[] = {
+        { .compatible = "fsl,mpc5121-immr", },
+        { .compatible = "fsl,mpc5121-localbus", },
+        {},
+};
+
+void __init mpc512x_declare_of_platform_devices(void)
+{
+        if (of_platform_bus_probe(NULL, of_bus_ids, NULL))
+                printk(KERN_ERR __FILE__ ": "
+                        "Error while probing of_platform bus\n");
+}
+