Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Steven King |
233 |
47.75% |
2 |
16.67% |
| Greg Ungerer |
153 |
31.35% |
4 |
33.33% |
| Geert Uytterhoeven |
79 |
16.19% |
1 |
8.33% |
| Jonas Gorski |
8 |
1.64% |
1 |
8.33% |
| Defang Bo |
7 |
1.43% |
1 |
8.33% |
| Masahiro Yamada |
6 |
1.23% |
1 |
8.33% |
| Greg Kroah-Hartman |
1 |
0.20% |
1 |
8.33% |
| Dan Carpenter |
1 |
0.20% |
1 |
8.33% |
| Total |
488 |
|
12 |
|
// SPDX-License-Identifier: GPL-2.0
/***************************************************************************/
/*
* clk.c -- general ColdFire CPU kernel clk handling
*
* Copyright (C) 2009, Greg Ungerer (gerg@snapgear.com)
*/
/***************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfclk.h>
static DEFINE_SPINLOCK(clk_lock);
#ifdef MCFPM_PPMCR0
/*
* For more advanced ColdFire parts that have clocks that can be enabled
* we supply enable/disable functions. These must properly define their
* clocks in their platform specific code.
*/
void __clk_init_enabled(struct clk *clk)
{
clk->enabled = 1;
clk->clk_ops->enable(clk);
}
void __clk_init_disabled(struct clk *clk)
{
clk->enabled = 0;
clk->clk_ops->disable(clk);
}
static void __clk_enable0(struct clk *clk)
{
__raw_writeb(clk->slot, MCFPM_PPMCR0);
}
static void __clk_disable0(struct clk *clk)
{
__raw_writeb(clk->slot, MCFPM_PPMSR0);
}
struct clk_ops clk_ops0 = {
.enable = __clk_enable0,
.disable = __clk_disable0,
};
#ifdef MCFPM_PPMCR1
static void __clk_enable1(struct clk *clk)
{
__raw_writeb(clk->slot, MCFPM_PPMCR1);
}
static void __clk_disable1(struct clk *clk)
{
__raw_writeb(clk->slot, MCFPM_PPMSR1);
}
struct clk_ops clk_ops1 = {
.enable = __clk_enable1,
.disable = __clk_disable1,
};
#endif /* MCFPM_PPMCR1 */
#endif /* MCFPM_PPMCR0 */
int clk_enable(struct clk *clk)
{
unsigned long flags;
if (!clk)
return 0;
spin_lock_irqsave(&clk_lock, flags);
if ((clk->enabled++ == 0) && clk->clk_ops)
clk->clk_ops->enable(clk);
spin_unlock_irqrestore(&clk_lock, flags);
return 0;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
unsigned long flags;
if (!clk)
return;
spin_lock_irqsave(&clk_lock, flags);
if ((--clk->enabled == 0) && clk->clk_ops)
clk->clk_ops->disable(clk);
spin_unlock_irqrestore(&clk_lock, flags);
}
EXPORT_SYMBOL(clk_disable);
unsigned long clk_get_rate(struct clk *clk)
{
if (!clk)
return 0;
return clk->rate;
}
EXPORT_SYMBOL(clk_get_rate);
/* dummy functions, should not be called */
long clk_round_rate(struct clk *clk, unsigned long rate)
{
WARN_ON(clk);
return 0;
}
EXPORT_SYMBOL(clk_round_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
WARN_ON(clk);
return 0;
}
EXPORT_SYMBOL(clk_set_rate);
int clk_set_parent(struct clk *clk, struct clk *parent)
{
WARN_ON(clk);
return 0;
}
EXPORT_SYMBOL(clk_set_parent);
struct clk *clk_get_parent(struct clk *clk)
{
WARN_ON(clk);
return NULL;
}
EXPORT_SYMBOL(clk_get_parent);
/***************************************************************************/