linux/arch/arm/mach-ux500/clock.c
Russell King 0a0300dc8c ARM: Consolidate clks_register() and similar
Most machine classes want some way to register a block of clk_lookup
structures, and most do it by implementing a clks_register() type
function which walks an array, or by open-coding a loop.

Consolidate all this into clkdev_add_table().

Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-02-12 17:32:36 +00:00

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);