1 files changed, 19 insertions, 327 deletions

diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index b5f1e23ed57..4187cf4fe18 100644
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -1,11 +1,11 @@
 /*
  * arch/sh/kernel/cpu/clock.c - SuperH clock framework
  *
- *  Copyright (C) 2005, 2006, 2007  Paul Mundt
+ *  Copyright (C) 2005 - 2009  Paul Mundt
  *
  * This clock framework is derived from the OMAP version by:
  *
- *	Copyright (C) 2004 - 2005 Nokia Corporation
+ *	Copyright (C) 2004 - 2008 Nokia Corporation
  *	Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
  *
  *  Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
@@ -16,344 +16,36 @@
  */
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/list.h>
-#include <linux/kref.h>
-#include <linux/seq_file.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/proc_fs.h>
+#include <linux/clk.h>
 #include <asm/clock.h>
-#include <asm/timer.h>
+#include <asm/machvec.h>
 
-static LIST_HEAD(clock_list);
-static DEFINE_SPINLOCK(clock_lock);
-static DEFINE_MUTEX(clock_list_sem);
-
-/*
- * Each subtype is expected to define the init routines for these clocks,
- * as each subtype (or processor family) will have these clocks at the
- * very least. These are all provided through the CPG, which even some of
- * the more quirky parts (such as ST40, SH4-202, etc.) still have.
- *
- * The processor-specific code is expected to register any additional
- * clock sources that are of interest.
- */
-static struct clk master_clk = {
-	.name		= "master_clk",
-	.flags		= CLK_ALWAYS_ENABLED | CLK_RATE_PROPAGATES,
-	.rate		= CONFIG_SH_PCLK_FREQ,
-};
-
-static struct clk module_clk = {
-	.name		= "module_clk",
-	.parent		= &master_clk,
-	.flags		= CLK_ALWAYS_ENABLED | CLK_RATE_PROPAGATES,
-};
-
-static struct clk bus_clk = {
-	.name		= "bus_clk",
-	.parent		= &master_clk,
-	.flags		= CLK_ALWAYS_ENABLED | CLK_RATE_PROPAGATES,
-};
-
-static struct clk cpu_clk = {
-	.name		= "cpu_clk",
-	.parent		= &master_clk,
-	.flags		= CLK_ALWAYS_ENABLED,
-};
-
-/*
- * The ordering of these clocks matters, do not change it.
- */
-static struct clk *onchip_clocks[] = {
-	&master_clk,
-	&module_clk,
-	&bus_clk,
-	&cpu_clk,
-};
-
-static void propagate_rate(struct clk *clk)
-{
-	struct clk *clkp;
-
-	list_for_each_entry(clkp, &clock_list, node) {
-		if (likely(clkp->parent != clk))
-			continue;
-		if (likely(clkp->ops && clkp->ops->recalc))
-			clkp->ops->recalc(clkp);
-		if (unlikely(clkp->flags & CLK_RATE_PROPAGATES))
-			propagate_rate(clkp);
-	}
-}
-
-int __clk_enable(struct clk *clk)
-{
-	/*
-	 * See if this is the first time we're enabling the clock, some
-	 * clocks that are always enabled still require "special"
-	 * initialization. This is especially true if the clock mode
-	 * changes and the clock needs to hunt for the proper set of
-	 * divisors to use before it can effectively recalc.
-	 */
-	if (unlikely(atomic_read(&clk->kref.refcount) == 1))
-		if (clk->ops && clk->ops->init)
-			clk->ops->init(clk);
-
-	kref_get(&clk->kref);
-
-	if (clk->flags & CLK_ALWAYS_ENABLED)
-		return 0;
-
-	if (likely(clk->ops && clk->ops->enable))
-		clk->ops->enable(clk);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(__clk_enable);
-
-int clk_enable(struct clk *clk)
+int __init clk_init(void)
 {
-	unsigned long flags;
 	int ret;
 
-	spin_lock_irqsave(&clock_lock, flags);
-	ret = __clk_enable(clk);
-	spin_unlock_irqrestore(&clock_lock, flags);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(clk_enable);
-
-static void clk_kref_release(struct kref *kref)
-{
-	/* Nothing to do */
-}
-
-void __clk_disable(struct clk *clk)
-{
-	int count = kref_put(&clk->kref, clk_kref_release);
-
-	if (clk->flags & CLK_ALWAYS_ENABLED)
-		return;
-
-	if (!count) {	/* count reaches zero, disable the clock */
-		if (likely(clk->ops && clk->ops->disable))
-			clk->ops->disable(clk);
-	}
-}
-EXPORT_SYMBOL_GPL(__clk_disable);
-
-void clk_disable(struct clk *clk)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&clock_lock, flags);
-	__clk_disable(clk);
-	spin_unlock_irqrestore(&clock_lock, flags);
-}
-EXPORT_SYMBOL_GPL(clk_disable);
-
-int clk_register(struct clk *clk)
-{
-	mutex_lock(&clock_list_sem);
-
-	list_add(&clk->node, &clock_list);
-	kref_init(&clk->kref);
-
-	mutex_unlock(&clock_list_sem);
-
-	if (clk->flags & CLK_ALWAYS_ENABLED) {
-		pr_debug( "Clock '%s' is ALWAYS_ENABLED\n", clk->name);
-		if (clk->ops && clk->ops->init)
-			clk->ops->init(clk);
-		if (clk->ops && clk->ops->enable)
-			clk->ops->enable(clk);
-		pr_debug( "Enabled.");
+	ret = arch_clk_init();
+	if (unlikely(ret)) {
+		pr_err("%s: CPU clock registration failed.\n", __func__);
+		return ret;
 	}
 
-	return 0;
-}
-EXPORT_SYMBOL_GPL(clk_register);
-
-void clk_unregister(struct clk *clk)
-{
-	mutex_lock(&clock_list_sem);
-	list_del(&clk->node);
-	mutex_unlock(&clock_list_sem);
-}
-EXPORT_SYMBOL_GPL(clk_unregister);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-	return clk->rate;
-}
-EXPORT_SYMBOL_GPL(clk_get_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
-	return clk_set_rate_ex(clk, rate, 0);
-}
-EXPORT_SYMBOL_GPL(clk_set_rate);
-
-int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id)
-{
-	int ret = -EOPNOTSUPP;
-
-	if (likely(clk->ops && clk->ops->set_rate)) {
-		unsigned long flags;
-
-		spin_lock_irqsave(&clock_lock, flags);
-		ret = clk->ops->set_rate(clk, rate, algo_id);
-		spin_unlock_irqrestore(&clock_lock, flags);
-	}
-
-	if (unlikely(clk->flags & CLK_RATE_PROPAGATES))
-		propagate_rate(clk);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(clk_set_rate_ex);
-
-void clk_recalc_rate(struct clk *clk)
-{
-	if (likely(clk->ops && clk->ops->recalc)) {
-		unsigned long flags;
-
-		spin_lock_irqsave(&clock_lock, flags);
-		clk->ops->recalc(clk);
-		spin_unlock_irqrestore(&clock_lock, flags);
-	}
-
-	if (unlikely(clk->flags & CLK_RATE_PROPAGATES))
-		propagate_rate(clk);
-}
-EXPORT_SYMBOL_GPL(clk_recalc_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
-	if (likely(clk->ops && clk->ops->round_rate)) {
-		unsigned long flags, rounded;
-
-		spin_lock_irqsave(&clock_lock, flags);
-		rounded = clk->ops->round_rate(clk, rate);
-		spin_unlock_irqrestore(&clock_lock, flags);
-
-		return rounded;
-	}
-
-	return clk_get_rate(clk);
-}
-EXPORT_SYMBOL_GPL(clk_round_rate);
-
-/*
- * Returns a clock. Note that we first try to use device id on the bus
- * and clock name. If this fails, we try to use clock name only.
- */
-struct clk *clk_get(struct device *dev, const char *id)
-{
-	struct clk *p, *clk = ERR_PTR(-ENOENT);
-	int idno;
-
-	if (dev == NULL || dev->bus != &platform_bus_type)
-		idno = -1;
-	else
-		idno = to_platform_device(dev)->id;
-
-	mutex_lock(&clock_list_sem);
-	list_for_each_entry(p, &clock_list, node) {
-		if (p->id == idno &&
-		    strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
-			clk = p;
-			goto found;
+	if (sh_mv.mv_clk_init) {
+		ret = sh_mv.mv_clk_init();
+		if (unlikely(ret)) {
+			pr_err("%s: machvec clock initialization failed.\n",
+			       __func__);
+			return ret;
 		}
 	}
 
-	list_for_each_entry(p, &clock_list, node) {
-		if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
-			clk = p;
-			break;
-		}
-	}
-
-found:
-	mutex_unlock(&clock_list_sem);
-
-	return clk;
-}
-EXPORT_SYMBOL_GPL(clk_get);
-
-void clk_put(struct clk *clk)
-{
-	if (clk && !IS_ERR(clk))
-		module_put(clk->owner);
-}
-EXPORT_SYMBOL_GPL(clk_put);
-
-void __init __attribute__ ((weak))
-arch_init_clk_ops(struct clk_ops **ops, int type)
-{
-}
-
-void __init __attribute__ ((weak))
-arch_clk_init(void)
-{
-}
-
-static int show_clocks(char *buf, char **start, off_t off,
-		       int len, int *eof, void *data)
-{
-	struct clk *clk;
-	char *p = buf;
-
-	list_for_each_entry_reverse(clk, &clock_list, node) {
-		unsigned long rate = clk_get_rate(clk);
-
-		/*
-		 * Don't bother listing dummy clocks with no ancestry
-		 * that only support enable and disable ops.
-		 */
-		if (unlikely(!rate && !clk->parent))
-			continue;
-
-		p += sprintf(p, "%-12s\t: %ld.%02ldMHz\n", clk->name,
-			     rate / 1000000, (rate % 1000000) / 10000);
-	}
-
-	return p - buf;
-}
-
-int __init clk_init(void)
-{
-	int i, ret = 0;
-
-	BUG_ON(!master_clk.rate);
-
-	for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
-		struct clk *clk = onchip_clocks[i];
-
-		arch_init_clk_ops(&clk->ops, i);
-		ret |= clk_register(clk);
-	}
-
-	arch_clk_init();
-
 	/* Kick the child clocks.. */
-	propagate_rate(&master_clk);
-	propagate_rate(&bus_clk);
+	recalculate_root_clocks();
+
+	/* Enable the necessary init clocks */
+	clk_enable_init_clocks();
 
 	return ret;
 }
 
-static int __init clk_proc_init(void)
-{
-	struct proc_dir_entry *p;
-	p = create_proc_read_entry("clocks", S_IRUSR, NULL,
-				   show_clocks, NULL);
-	if (unlikely(!p))
-		return -EINVAL;
 
-	return 0;
-}
-subsys_initcall(clk_proc_init);