ARM: OMAP: duplicate plat-omap/clock.c into mach-omap[12]/clock.c
Duplicate arch/arm/plat-omap/clock.c into arch/arm/mach-omap1/clock.c and arch/arm/mach-omap2/clock.c. This is to support people who are working on the ARM single image kernel and the OMAP common clock framework conversion. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Paul Walmsley
committed by
Tony Lindgren
Tony Lindgren
parent
f7a9b8a147
commit
1fe9be8248
@@ -3,7 +3,7 @@
|
||||
#
|
||||
|
||||
# Common support
|
||||
obj-y := common.o sram.o clock.o dma.o fb.o counter_32k.o
|
||||
obj-y := common.o sram.o dma.o fb.o counter_32k.o
|
||||
obj-m :=
|
||||
obj-n :=
|
||||
obj- :=
|
||||
|
||||
@@ -1,544 +0,0 @@
|
||||
/*
|
||||
* linux/arch/arm/plat-omap/clock.c
|
||||
*
|
||||
* Copyright (C) 2004 - 2008 Nokia corporation
|
||||
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
|
||||
*
|
||||
* Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
|
||||
*
|
||||
* 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/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/cpufreq.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <plat/clock.h>
|
||||
|
||||
static LIST_HEAD(clocks);
|
||||
static DEFINE_MUTEX(clocks_mutex);
|
||||
static DEFINE_SPINLOCK(clockfw_lock);
|
||||
|
||||
static struct clk_functions *arch_clock;
|
||||
|
||||
/*
|
||||
* Standard clock functions defined in include/linux/clk.h
|
||||
*/
|
||||
|
||||
int clk_enable(struct clk *clk)
|
||||
{
|
||||
unsigned long flags;
|
||||
int ret;
|
||||
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return -EINVAL;
|
||||
|
||||
if (!arch_clock || !arch_clock->clk_enable)
|
||||
return -EINVAL;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
ret = arch_clock->clk_enable(clk);
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_enable);
|
||||
|
||||
void clk_disable(struct clk *clk)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return;
|
||||
|
||||
if (!arch_clock || !arch_clock->clk_disable)
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
if (clk->usecount == 0) {
|
||||
pr_err("Trying disable clock %s with 0 usecount\n",
|
||||
clk->name);
|
||||
WARN_ON(1);
|
||||
goto out;
|
||||
}
|
||||
|
||||
arch_clock->clk_disable(clk);
|
||||
|
||||
out:
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
}
|
||||
EXPORT_SYMBOL(clk_disable);
|
||||
|
||||
unsigned long clk_get_rate(struct clk *clk)
|
||||
{
|
||||
unsigned long flags;
|
||||
unsigned long ret;
|
||||
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return 0;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
ret = clk->rate;
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_get_rate);
|
||||
|
||||
/*
|
||||
* Optional clock functions defined in include/linux/clk.h
|
||||
*/
|
||||
|
||||
long clk_round_rate(struct clk *clk, unsigned long rate)
|
||||
{
|
||||
unsigned long flags;
|
||||
long ret;
|
||||
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return 0;
|
||||
|
||||
if (!arch_clock || !arch_clock->clk_round_rate)
|
||||
return 0;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
ret = arch_clock->clk_round_rate(clk, rate);
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_round_rate);
|
||||
|
||||
int clk_set_rate(struct clk *clk, unsigned long rate)
|
||||
{
|
||||
unsigned long flags;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return ret;
|
||||
|
||||
if (!arch_clock || !arch_clock->clk_set_rate)
|
||||
return ret;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
ret = arch_clock->clk_set_rate(clk, rate);
|
||||
if (ret == 0)
|
||||
propagate_rate(clk);
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_set_rate);
|
||||
|
||||
int clk_set_parent(struct clk *clk, struct clk *parent)
|
||||
{
|
||||
unsigned long flags;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (clk == NULL || IS_ERR(clk) || parent == NULL || IS_ERR(parent))
|
||||
return ret;
|
||||
|
||||
if (!arch_clock || !arch_clock->clk_set_parent)
|
||||
return ret;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
if (clk->usecount == 0) {
|
||||
ret = arch_clock->clk_set_parent(clk, parent);
|
||||
if (ret == 0)
|
||||
propagate_rate(clk);
|
||||
} else
|
||||
ret = -EBUSY;
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_set_parent);
|
||||
|
||||
struct clk *clk_get_parent(struct clk *clk)
|
||||
{
|
||||
return clk->parent;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_get_parent);
|
||||
|
||||
/*
|
||||
* OMAP specific clock functions shared between omap1 and omap2
|
||||
*/
|
||||
|
||||
int __initdata mpurate;
|
||||
|
||||
/*
|
||||
* By default we use the rate set by the bootloader.
|
||||
* You can override this with mpurate= cmdline option.
|
||||
*/
|
||||
static int __init omap_clk_setup(char *str)
|
||||
{
|
||||
get_option(&str, &mpurate);
|
||||
|
||||
if (!mpurate)
|
||||
return 1;
|
||||
|
||||
if (mpurate < 1000)
|
||||
mpurate *= 1000000;
|
||||
|
||||
return 1;
|
||||
}
|
||||
__setup("mpurate=", omap_clk_setup);
|
||||
|
||||
/* Used for clocks that always have same value as the parent clock */
|
||||
unsigned long followparent_recalc(struct clk *clk)
|
||||
{
|
||||
return clk->parent->rate;
|
||||
}
|
||||
|
||||
/*
|
||||
* Used for clocks that have the same value as the parent clock,
|
||||
* divided by some factor
|
||||
*/
|
||||
unsigned long omap_fixed_divisor_recalc(struct clk *clk)
|
||||
{
|
||||
WARN_ON(!clk->fixed_div);
|
||||
|
||||
return clk->parent->rate / clk->fixed_div;
|
||||
}
|
||||
|
||||
void clk_reparent(struct clk *child, struct clk *parent)
|
||||
{
|
||||
list_del_init(&child->sibling);
|
||||
if (parent)
|
||||
list_add(&child->sibling, &parent->children);
|
||||
child->parent = parent;
|
||||
|
||||
/* now do the debugfs renaming to reattach the child
|
||||
to the proper parent */
|
||||
}
|
||||
|
||||
/* Propagate rate to children */
|
||||
void propagate_rate(struct clk *tclk)
|
||||
{
|
||||
struct clk *clkp;
|
||||
|
||||
list_for_each_entry(clkp, &tclk->children, sibling) {
|
||||
if (clkp->recalc)
|
||||
clkp->rate = clkp->recalc(clkp);
|
||||
propagate_rate(clkp);
|
||||
}
|
||||
}
|
||||
|
||||
static LIST_HEAD(root_clks);
|
||||
|
||||
/**
|
||||
* recalculate_root_clocks - recalculate and propagate all root clocks
|
||||
*
|
||||
* Recalculates all root clocks (clocks with no parent), which if the
|
||||
* clock's .recalc is set correctly, should also propagate their rates.
|
||||
* Called at init.
|
||||
*/
|
||||
void recalculate_root_clocks(void)
|
||||
{
|
||||
struct clk *clkp;
|
||||
|
||||
list_for_each_entry(clkp, &root_clks, sibling) {
|
||||
if (clkp->recalc)
|
||||
clkp->rate = clkp->recalc(clkp);
|
||||
propagate_rate(clkp);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* clk_preinit - initialize any fields in the struct clk before clk init
|
||||
* @clk: struct clk * to initialize
|
||||
*
|
||||
* Initialize any struct clk fields needed before normal clk initialization
|
||||
* can run. No return value.
|
||||
*/
|
||||
void clk_preinit(struct clk *clk)
|
||||
{
|
||||
INIT_LIST_HEAD(&clk->children);
|
||||
}
|
||||
|
||||
int clk_register(struct clk *clk)
|
||||
{
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return -EINVAL;
|
||||
|
||||
/*
|
||||
* trap out already registered clocks
|
||||
*/
|
||||
if (clk->node.next || clk->node.prev)
|
||||
return 0;
|
||||
|
||||
mutex_lock(&clocks_mutex);
|
||||
if (clk->parent)
|
||||
list_add(&clk->sibling, &clk->parent->children);
|
||||
else
|
||||
list_add(&clk->sibling, &root_clks);
|
||||
|
||||
list_add(&clk->node, &clocks);
|
||||
if (clk->init)
|
||||
clk->init(clk);
|
||||
mutex_unlock(&clocks_mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(clk_register);
|
||||
|
||||
void clk_unregister(struct clk *clk)
|
||||
{
|
||||
if (clk == NULL || IS_ERR(clk))
|
||||
return;
|
||||
|
||||
mutex_lock(&clocks_mutex);
|
||||
list_del(&clk->sibling);
|
||||
list_del(&clk->node);
|
||||
mutex_unlock(&clocks_mutex);
|
||||
}
|
||||
EXPORT_SYMBOL(clk_unregister);
|
||||
|
||||
void clk_enable_init_clocks(void)
|
||||
{
|
||||
struct clk *clkp;
|
||||
|
||||
list_for_each_entry(clkp, &clocks, node) {
|
||||
if (clkp->flags & ENABLE_ON_INIT)
|
||||
clk_enable(clkp);
|
||||
}
|
||||
}
|
||||
|
||||
int omap_clk_enable_autoidle_all(void)
|
||||
{
|
||||
struct clk *c;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
|
||||
list_for_each_entry(c, &clocks, node)
|
||||
if (c->ops->allow_idle)
|
||||
c->ops->allow_idle(c);
|
||||
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int omap_clk_disable_autoidle_all(void)
|
||||
{
|
||||
struct clk *c;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
|
||||
list_for_each_entry(c, &clocks, node)
|
||||
if (c->ops->deny_idle)
|
||||
c->ops->deny_idle(c);
|
||||
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Low level helpers
|
||||
*/
|
||||
static int clkll_enable_null(struct clk *clk)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void clkll_disable_null(struct clk *clk)
|
||||
{
|
||||
}
|
||||
|
||||
const struct clkops clkops_null = {
|
||||
.enable = clkll_enable_null,
|
||||
.disable = clkll_disable_null,
|
||||
};
|
||||
|
||||
/*
|
||||
* Dummy clock
|
||||
*
|
||||
* Used for clock aliases that are needed on some OMAPs, but not others
|
||||
*/
|
||||
struct clk dummy_ck = {
|
||||
.name = "dummy",
|
||||
.ops = &clkops_null,
|
||||
};
|
||||
|
||||
/*
|
||||
*
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_OMAP_RESET_CLOCKS
|
||||
/*
|
||||
* Disable any unused clocks left on by the bootloader
|
||||
*/
|
||||
static int __init clk_disable_unused(void)
|
||||
{
|
||||
struct clk *ck;
|
||||
unsigned long flags;
|
||||
|
||||
if (!arch_clock || !arch_clock->clk_disable_unused)
|
||||
return 0;
|
||||
|
||||
pr_info("clock: disabling unused clocks to save power\n");
|
||||
|
||||
spin_lock_irqsave(&clockfw_lock, flags);
|
||||
list_for_each_entry(ck, &clocks, node) {
|
||||
if (ck->ops == &clkops_null)
|
||||
continue;
|
||||
|
||||
if (ck->usecount > 0 || !ck->enable_reg)
|
||||
continue;
|
||||
|
||||
arch_clock->clk_disable_unused(ck);
|
||||
}
|
||||
spin_unlock_irqrestore(&clockfw_lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
late_initcall(clk_disable_unused);
|
||||
late_initcall(omap_clk_enable_autoidle_all);
|
||||
#endif
|
||||
|
||||
int __init clk_init(struct clk_functions * custom_clocks)
|
||||
{
|
||||
if (!custom_clocks) {
|
||||
pr_err("No custom clock functions registered\n");
|
||||
BUG();
|
||||
}
|
||||
|
||||
arch_clock = custom_clocks;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
|
||||
/*
|
||||
* debugfs support to trace clock tree hierarchy and attributes
|
||||
*/
|
||||
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/seq_file.h>
|
||||
|
||||
static struct dentry *clk_debugfs_root;
|
||||
|
||||
static int clk_dbg_show_summary(struct seq_file *s, void *unused)
|
||||
{
|
||||
struct clk *c;
|
||||
struct clk *pa;
|
||||
|
||||
mutex_lock(&clocks_mutex);
|
||||
seq_printf(s, "%-30s %-30s %-10s %s\n",
|
||||
"clock-name", "parent-name", "rate", "use-count");
|
||||
|
||||
list_for_each_entry(c, &clocks, node) {
|
||||
pa = c->parent;
|
||||
seq_printf(s, "%-30s %-30s %-10lu %d\n",
|
||||
c->name, pa ? pa->name : "none", c->rate, c->usecount);
|
||||
}
|
||||
mutex_unlock(&clocks_mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int clk_dbg_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_open(file, clk_dbg_show_summary, inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations debug_clock_fops = {
|
||||
.open = clk_dbg_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static int clk_debugfs_register_one(struct clk *c)
|
||||
{
|
||||
int err;
|
||||
struct dentry *d;
|
||||
struct clk *pa = c->parent;
|
||||
|
||||
d = debugfs_create_dir(c->name, pa ? pa->dent : clk_debugfs_root);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
c->dent = d;
|
||||
|
||||
d = debugfs_create_u8("usecount", S_IRUGO, c->dent, (u8 *)&c->usecount);
|
||||
if (!d) {
|
||||
err = -ENOMEM;
|
||||
goto err_out;
|
||||
}
|
||||
d = debugfs_create_u32("rate", S_IRUGO, c->dent, (u32 *)&c->rate);
|
||||
if (!d) {
|
||||
err = -ENOMEM;
|
||||
goto err_out;
|
||||
}
|
||||
d = debugfs_create_x32("flags", S_IRUGO, c->dent, (u32 *)&c->flags);
|
||||
if (!d) {
|
||||
err = -ENOMEM;
|
||||
goto err_out;
|
||||
}
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
debugfs_remove_recursive(c->dent);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int clk_debugfs_register(struct clk *c)
|
||||
{
|
||||
int err;
|
||||
struct clk *pa = c->parent;
|
||||
|
||||
if (pa && !pa->dent) {
|
||||
err = clk_debugfs_register(pa);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
if (!c->dent) {
|
||||
err = clk_debugfs_register_one(c);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init clk_debugfs_init(void)
|
||||
{
|
||||
struct clk *c;
|
||||
struct dentry *d;
|
||||
int err;
|
||||
|
||||
d = debugfs_create_dir("clock", NULL);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
clk_debugfs_root = d;
|
||||
|
||||
list_for_each_entry(c, &clocks, node) {
|
||||
err = clk_debugfs_register(c);
|
||||
if (err)
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
d = debugfs_create_file("summary", S_IRUGO,
|
||||
d, NULL, &debug_clock_fops);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
return 0;
|
||||
err_out:
|
||||
debugfs_remove_recursive(clk_debugfs_root);
|
||||
return err;
|
||||
}
|
||||
late_initcall(clk_debugfs_init);
|
||||
|
||||
#endif /* defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) */
|
||||
Reference in New Issue
Block a user