93 lines
1.6 KiB
C
93 lines
1.6 KiB
C
/*
|
|
* Copyright (C) 2009 ST-Ericsson
|
|
* heavily based on realview platform
|
|
*
|
|
* 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/clkdev.h>
|
|
|
|
/* currently the clk structure
|
|
* just supports rate. This would
|
|
* be extended as and when new devices are
|
|
* added - TODO
|
|
*/
|
|
struct clk {
|
|
unsigned long rate;
|
|
};
|
|
|
|
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)
|
|
{
|
|
/*TODO*/
|
|
return rate;
|
|
}
|
|
EXPORT_SYMBOL(clk_round_rate);
|
|
|
|
int clk_set_rate(struct clk *clk, unsigned long rate)
|
|
{
|
|
clk->rate = rate;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(clk_set_rate);
|
|
|
|
/* ssp clock */
|
|
static struct clk ssp_clk = {
|
|
.rate = 48000000,
|
|
};
|
|
|
|
/* fixed clock */
|
|
static struct clk f38_clk = {
|
|
.rate = 38400000,
|
|
};
|
|
|
|
static struct clk_lookup lookups[] = {
|
|
{
|
|
/* UART0 */
|
|
.dev_id = "uart0",
|
|
.clk = &f38_clk,
|
|
}, { /* UART1 */
|
|
.dev_id = "uart1",
|
|
.clk = &f38_clk,
|
|
}, { /* UART2 */
|
|
.dev_id = "uart2",
|
|
.clk = &f38_clk,
|
|
}, { /* SSP */
|
|
.dev_id = "pl022",
|
|
.clk = &ssp_clk,
|
|
}
|
|
};
|
|
|
|
static int __init clk_init(void)
|
|
{
|
|
/* register the clock lookups */
|
|
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
|
|
return 0;
|
|
}
|
|
arch_initcall(clk_init);
|