950e4da324
None of these files use any of the functionality promised by asm/semaphore.h. It's possible that they rely on it dragging in some unrelated header file, but I can't build all these files, so we'll have fix any build failures as they come up. Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
134 lines
2.5 KiB
C
134 lines
2.5 KiB
C
/*
|
|
* linux/arch/arm/mach-realview/clock.c
|
|
*
|
|
* Copyright (C) 2004 ARM Limited.
|
|
* Written by Deep Blue Solutions Limited.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/err.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <asm/hardware/icst307.h>
|
|
|
|
#include "clock.h"
|
|
|
|
static LIST_HEAD(clocks);
|
|
static DEFINE_MUTEX(clocks_mutex);
|
|
|
|
struct clk *clk_get(struct device *dev, const char *id)
|
|
{
|
|
struct clk *p, *clk = ERR_PTR(-ENOENT);
|
|
|
|
mutex_lock(&clocks_mutex);
|
|
list_for_each_entry(p, &clocks, node) {
|
|
if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
|
|
clk = p;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&clocks_mutex);
|
|
|
|
return clk;
|
|
}
|
|
EXPORT_SYMBOL(clk_get);
|
|
|
|
void clk_put(struct clk *clk)
|
|
{
|
|
module_put(clk->owner);
|
|
}
|
|
EXPORT_SYMBOL(clk_put);
|
|
|
|
int clk_enable(struct clk *clk)
|
|
{
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(clk_enable);
|
|
|
|
void clk_disable(struct clk *clk)
|
|
{
|
|
}
|
|
EXPORT_SYMBOL(clk_disable);
|
|
|
|
unsigned long clk_get_rate(struct clk *clk)
|
|
{
|
|
return clk->rate;
|
|
}
|
|
EXPORT_SYMBOL(clk_get_rate);
|
|
|
|
long clk_round_rate(struct clk *clk, unsigned long rate)
|
|
{
|
|
return rate;
|
|
}
|
|
EXPORT_SYMBOL(clk_round_rate);
|
|
|
|
int clk_set_rate(struct clk *clk, unsigned long rate)
|
|
{
|
|
int ret = -EIO;
|
|
|
|
if (clk->setvco) {
|
|
struct icst307_vco vco;
|
|
|
|
vco = icst307_khz_to_vco(clk->params, rate / 1000);
|
|
clk->rate = icst307_khz(clk->params, vco) * 1000;
|
|
|
|
printk("Clock %s: setting VCO reg params: S=%d R=%d V=%d\n",
|
|
clk->name, vco.s, vco.r, vco.v);
|
|
|
|
clk->setvco(clk, vco);
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(clk_set_rate);
|
|
|
|
/*
|
|
* These are fixed clocks.
|
|
*/
|
|
static struct clk kmi_clk = {
|
|
.name = "KMIREFCLK",
|
|
.rate = 24000000,
|
|
};
|
|
|
|
static struct clk uart_clk = {
|
|
.name = "UARTCLK",
|
|
.rate = 24000000,
|
|
};
|
|
|
|
static struct clk mmci_clk = {
|
|
.name = "MCLK",
|
|
.rate = 33000000,
|
|
};
|
|
|
|
int clk_register(struct clk *clk)
|
|
{
|
|
mutex_lock(&clocks_mutex);
|
|
list_add(&clk->node, &clocks);
|
|
mutex_unlock(&clocks_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(clk_register);
|
|
|
|
void clk_unregister(struct clk *clk)
|
|
{
|
|
mutex_lock(&clocks_mutex);
|
|
list_del(&clk->node);
|
|
mutex_unlock(&clocks_mutex);
|
|
}
|
|
EXPORT_SYMBOL(clk_unregister);
|
|
|
|
static int __init clk_init(void)
|
|
{
|
|
clk_register(&kmi_clk);
|
|
clk_register(&uart_clk);
|
|
clk_register(&mmci_clk);
|
|
return 0;
|
|
}
|
|
arch_initcall(clk_init);
|