#include <linux/string.h>
#include <linux/clk.h>
#include <linux/mutex.h>
-#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/semaphore.h>
* 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 && try_module_get(p->owner)) {
- clk = p;
- goto found;
- }
- }
-
list_for_each_entry(p, &clocks, node) {
if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
clk = p;
break;
}
}
-
-found:
mutex_unlock(&clocks_mutex);
return clk;
unsigned long flags;
int ret = 0;
- if (clk == NULL || IS_ERR(clk))
- return -EINVAL;
-
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_enable)
ret = arch_clock->clk_enable(clk);
{
unsigned long flags;
- if (clk == NULL || IS_ERR(clk))
- return;
-
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_disable)
arch_clock->clk_disable(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);
unsigned long flags;
unsigned long ret = 0;
- if (clk == NULL || IS_ERR(clk))
- return 0;
-
spin_lock_irqsave(&clockfw_lock, flags);
ret = clk->rate;
spin_unlock_irqrestore(&clockfw_lock, flags);
unsigned long flags;
long ret = 0;
- if (clk == NULL || IS_ERR(clk))
- return ret;
-
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_round_rate)
ret = arch_clock->clk_round_rate(clk, rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
unsigned long flags;
- int ret = -EINVAL;
-
- if (clk == NULL || IS_ERR(clk))
- return ret;
+ int ret = 0;
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_set_rate)
int clk_set_parent(struct clk *clk, struct clk *parent)
{
unsigned long flags;
- int ret = -EINVAL;
-
- if (clk == NULL || IS_ERR(clk) || parent == NULL || IS_ERR(parent))
- return ret;
+ int ret = 0;
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_set_parent)
unsigned long flags;
struct clk * ret = NULL;
- if (clk == NULL || IS_ERR(clk))
- return ret;
-
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_get_parent)
ret = arch_clock->clk_get_parent(clk);
/* Used for clocks that always have same value as the parent clock */
void followparent_recalc(struct clk *clk)
{
- if (clk == NULL || IS_ERR(clk))
- return;
-
clk->rate = clk->parent->rate;
}
{
struct clk *clkp;
- if (tclk == NULL || IS_ERR(tclk))
- return;
-
list_for_each_entry(clkp, &clocks, node) {
if (likely(clkp->parent != tclk))
continue;
int clk_register(struct clk *clk)
{
- if (clk == NULL || IS_ERR(clk))
- return -EINVAL;
-
mutex_lock(&clocks_mutex);
list_add(&clk->node, &clocks);
if (clk->init)
void clk_unregister(struct clk *clk)
{
- if (clk == NULL || IS_ERR(clk))
- return;
-
mutex_lock(&clocks_mutex);
list_del(&clk->node);
mutex_unlock(&clocks_mutex);
{
unsigned long flags;
- if (clk == NULL || IS_ERR(clk))
- return;
-
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_deny_idle)
arch_clock->clk_deny_idle(clk);
{
unsigned long flags;
- if (clk == NULL || IS_ERR(clk))
- return;
-
spin_lock_irqsave(&clockfw_lock, flags);
if (arch_clock->clk_allow_idle)
arch_clock->clk_allow_idle(clk);