#include <linux/debugfs.h>
#include <linux/io.h>
-#include <mach/clock.h>
+#include <plat/clock.h>
static LIST_HEAD(clocks);
static DEFINE_MUTEX(clocks_mutex);
* Standard clock functions defined in include/linux/clk.h
*-------------------------------------------------------------------------*/
-/*
- * 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(&clocks_mutex);
-
- list_for_each_entry(p, &clocks, node) {
- if (p->id == idno && strcmp(id, p->name) == 0) {
- clk = p;
- goto found;
- }
- }
-
- list_for_each_entry(p, &clocks, node) {
- if (strcmp(id, p->name) == 0) {
- clk = p;
- break;
- }
- }
-
-found:
- mutex_unlock(&clocks_mutex);
-
- return clk;
-}
-EXPORT_SYMBOL(clk_get);
-
int clk_enable(struct clk *clk)
{
unsigned long flags;
}
EXPORT_SYMBOL(clk_disable);
-int clk_get_usecount(struct clk *clk)
-{
- unsigned long flags;
- int ret = 0;
-
- if (clk == NULL || IS_ERR(clk))
- return 0;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- ret = clk->usecount;
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_get_usecount);
-
unsigned long clk_get_rate(struct clk *clk)
{
unsigned long flags;
}
EXPORT_SYMBOL(clk_get_rate);
-void clk_put(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_put);
-
/*-------------------------------------------------------------------------
* Optional clock functions defined in include/linux/clk.h
*-------------------------------------------------------------------------*/
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_set_rate)
ret = arch_clock->clk_set_rate(clk, rate);
- if (ret == 0 && (clk->flags & RATE_PROPAGATES))
+ if (ret == 0) {
+ if (clk->recalc)
+ clk->rate = clk->recalc(clk);
propagate_rate(clk);
+ }
spin_unlock_irqrestore(&clockfw_lock, flags);
return ret;
unsigned long flags;
int ret = -EINVAL;
+ if (cpu_is_omap44xx())
+ /* OMAP4 clk framework not supported yet */
+ return 0;
if (clk == NULL || IS_ERR(clk) || parent == NULL || IS_ERR(parent))
return ret;
spin_lock_irqsave(&clockfw_lock, flags);
- if (arch_clock->clk_set_parent)
- ret = arch_clock->clk_set_parent(clk, parent);
- if (ret == 0 && (clk->flags & RATE_PROPAGATES))
- propagate_rate(clk);
+ if (clk->usecount == 0) {
+ if (arch_clock->clk_set_parent)
+ ret = arch_clock->clk_set_parent(clk, parent);
+ if (ret == 0) {
+ if (clk->recalc)
+ clk->rate = clk->recalc(clk);
+ propagate_rate(clk);
+ }
+ } else
+ ret = -EBUSY;
spin_unlock_irqrestore(&clockfw_lock, flags);
return ret;
__setup("mpurate=", omap_clk_setup);
/* Used for clocks that always have same value as the parent clock */
-void followparent_recalc(struct clk *clk)
+unsigned long followparent_recalc(struct clk *clk)
{
- if (clk == NULL || IS_ERR(clk))
- return;
+ return clk->parent->rate;
+}
+
+void clk_reparent(struct clk *child, struct clk *parent)
+{
+ list_del_init(&child->sibling);
+ if (parent)
+ list_add(&child->sibling, &parent->children);
+ child->parent = parent;
- clk->rate = clk->parent->rate;
+ /* now do the debugfs renaming to reattach the child
+ to the proper parent */
}
/* Propagate rate to children */
{
struct clk *clkp;
- if (tclk == NULL || IS_ERR(tclk))
- return;
-
- list_for_each_entry(clkp, &clocks, node) {
- if (likely(clkp->parent != tclk))
- continue;
+ list_for_each_entry(clkp, &tclk->children, sibling) {
if (clkp->recalc)
- clkp->recalc(clkp);
- if (clkp->flags & RATE_PROPAGATES)
- propagate_rate(clkp);
+ clkp->rate = clkp->recalc(clkp);
+ propagate_rate(clkp);
}
}
+static LIST_HEAD(root_clks);
+
/**
* recalculate_root_clocks - recalculate and propagate all root clocks
*
{
struct clk *clkp;
- list_for_each_entry(clkp, &clocks, node) {
- if (!clkp->parent) {
- if (clkp->recalc)
- clkp->recalc(clkp);
- if (clkp->flags & RATE_PROPAGATES)
- propagate_rate(clkp);
- }
+ list_for_each_entry(clkp, &root_clks, sibling) {
+ if (clkp->recalc)
+ clkp->rate = clkp->recalc(clkp);
+ propagate_rate(clkp);
}
}
+/**
+ * clk_preinit - initialize any fields in the struct clk before clk init
+ * @clk: struct clk * to initialize
+ *
+ * Initialize any struct clk fields needed before normal clk initialization
+ * can run. No return value.
+ */
+void clk_preinit(struct clk *clk)
+{
+ INIT_LIST_HEAD(&clk->children);
+}
+
int clk_register(struct clk *clk)
{
if (clk == NULL || IS_ERR(clk))
return -EINVAL;
+ /*
+ * trap out already registered clocks
+ */
+ if (clk->node.next || clk->node.prev)
+ return 0;
+
mutex_lock(&clocks_mutex);
+ if (clk->parent)
+ list_add(&clk->sibling, &clk->parent->children);
+ else
+ list_add(&clk->sibling, &root_clks);
+
list_add(&clk->node, &clocks);
if (clk->init)
clk->init(clk);
return;
mutex_lock(&clocks_mutex);
+ list_del(&clk->sibling);
list_del(&clk->node);
mutex_unlock(&clocks_mutex);
}
clk_enable(clkp);
}
}
-EXPORT_SYMBOL(clk_enable_init_clocks);
/*
* Low level helpers
arch_clock->clk_init_cpufreq_table(table);
spin_unlock_irqrestore(&clockfw_lock, flags);
}
-EXPORT_SYMBOL(clk_init_cpufreq_table);
+
+void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&clockfw_lock, flags);
+ if (arch_clock->clk_exit_cpufreq_table)
+ arch_clock->clk_exit_cpufreq_table(table);
+ spin_unlock_irqrestore(&clockfw_lock, flags);
+}
#endif
/*-------------------------------------------------------------------------*/
static int clk_debugfs_register_one(struct clk *c)
{
int err;
- struct dentry *d, *child;
+ struct dentry *d, *child, *child_tmp;
struct clk *pa = c->parent;
char s[255];
char *p = s;
err_out:
d = c->dent;
- list_for_each_entry(child, &d->d_subdirs, d_u.d_child)
+ list_for_each_entry_safe(child, child_tmp, &d->d_subdirs, d_u.d_child)
debugfs_remove(child);
debugfs_remove(c->dent);
return err;
}
return 0;
err_out:
- debugfs_remove(clk_debugfs_root); /* REVISIT: Cleanup correctly */
+ debugfs_remove_recursive(clk_debugfs_root);
return err;
}
late_initcall(clk_debugfs_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff