mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 00:11:22 +00:00
13f7558237
This patch uses the ability of PXA's clocklib to alias clock to resolve the problem caused by sharing the SA1111 IO controller between PXA and SA1100 architectures, which have differing GPIO numbering. Signed-off-by: Ian Molton <spyro@f2s.com>
128 lines
2.3 KiB
C
128 lines
2.3 KiB
C
/*
|
|
* linux/arch/arm/mach-sa1100/clock.c
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/err.h>
|
|
#include <linux/string.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <asm/arch/pxa2xx-regs.h>
|
|
#include <asm/arch/pxa2xx-gpio.h>
|
|
#include <asm/hardware.h>
|
|
|
|
#include "devices.h"
|
|
#include "generic.h"
|
|
#include "clock.h"
|
|
|
|
static LIST_HEAD(clocks);
|
|
static DEFINE_MUTEX(clocks_mutex);
|
|
static DEFINE_SPINLOCK(clocks_lock);
|
|
|
|
static struct clk *clk_lookup(struct device *dev, const char *id)
|
|
{
|
|
struct clk *p;
|
|
|
|
list_for_each_entry(p, &clocks, node)
|
|
if (strcmp(id, p->name) == 0 && p->dev == dev)
|
|
return p;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct clk *clk_get(struct device *dev, const char *id)
|
|
{
|
|
struct clk *p, *clk = ERR_PTR(-ENOENT);
|
|
|
|
mutex_lock(&clocks_mutex);
|
|
p = clk_lookup(dev, id);
|
|
if (!p)
|
|
p = clk_lookup(NULL, id);
|
|
if (p)
|
|
clk = p;
|
|
mutex_unlock(&clocks_mutex);
|
|
|
|
if (!IS_ERR(clk) && clk->ops == NULL)
|
|
clk = clk->other;
|
|
|
|
return clk;
|
|
}
|
|
EXPORT_SYMBOL(clk_get);
|
|
|
|
void clk_put(struct clk *clk)
|
|
{
|
|
}
|
|
EXPORT_SYMBOL(clk_put);
|
|
|
|
int clk_enable(struct clk *clk)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&clocks_lock, flags);
|
|
if (clk->enabled++ == 0)
|
|
clk->ops->enable(clk);
|
|
spin_unlock_irqrestore(&clocks_lock, flags);
|
|
|
|
if (clk->delay)
|
|
udelay(clk->delay);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(clk_enable);
|
|
|
|
void clk_disable(struct clk *clk)
|
|
{
|
|
unsigned long flags;
|
|
|
|
WARN_ON(clk->enabled == 0);
|
|
|
|
spin_lock_irqsave(&clocks_lock, flags);
|
|
if (--clk->enabled == 0)
|
|
clk->ops->disable(clk);
|
|
spin_unlock_irqrestore(&clocks_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(clk_disable);
|
|
|
|
unsigned long clk_get_rate(struct clk *clk)
|
|
{
|
|
unsigned long rate;
|
|
|
|
rate = clk->rate;
|
|
if (clk->ops->getrate)
|
|
rate = clk->ops->getrate(clk);
|
|
|
|
return rate;
|
|
}
|
|
EXPORT_SYMBOL(clk_get_rate);
|
|
|
|
|
|
void clk_cken_enable(struct clk *clk)
|
|
{
|
|
CKEN |= 1 << clk->cken;
|
|
}
|
|
|
|
void clk_cken_disable(struct clk *clk)
|
|
{
|
|
CKEN &= ~(1 << clk->cken);
|
|
}
|
|
|
|
const struct clkops clk_cken_ops = {
|
|
.enable = clk_cken_enable,
|
|
.disable = clk_cken_disable,
|
|
};
|
|
|
|
void clks_register(struct clk *clks, size_t num)
|
|
{
|
|
int i;
|
|
|
|
mutex_lock(&clocks_mutex);
|
|
for (i = 0; i < num; i++)
|
|
list_add(&clks[i].node, &clocks);
|
|
mutex_unlock(&clocks_mutex);
|
|
}
|