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sh: clkfwk: Map tree hierarchy in debugfs.

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This adopts the OMAP clock framework debugfs bits and replaces the aging
procfs bits. The procfs clocks entry was primarily a debugging aid, and
used to be tied in to cpuinfo before the clock list grew too unweildly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-05-13 21:51:28 +09:00
parent cc96eace48
commit cedcf3366f
2 changed files with 86 additions and 27 deletions
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1
arch/sh/include/asm/clock.h
View file

@ -38,6 +38,7 @@ struct clk {
unsigned long arch_flags;
void *priv;
struct dentry *dentry;
};
struct clk_lookup {

112
arch/sh/kernel/cpu/clock.c
View file

@ -28,7 +28,7 @@
#include <linux/seq_file.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/proc_fs.h>
#include <linux/debugfs.h>
#include <asm/clock.h>
#include <asm/machvec.h>
@ -404,24 +404,6 @@ void clk_put(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_put);
static int show_clocks(char *buf, char **start, off_t off,
int len, int *eof, void *data)
{
struct clk *clk;
char *p = buf;
list_for_each_entry_reverse(clk, &clock_list, node) {
unsigned long rate = clk_get_rate(clk);
p += sprintf(p, "%-12s\t: %ld.%02ldMHz\t%s\n", clk->name,
rate / 1000000, (rate % 1000000) / 10000,
(clk->usecount > 0) ? "enabled" : "disabled");
}
return p - buf;
}
#ifdef CONFIG_PM
static int clks_sysdev_suspend(struct sys_device *dev, pm_message_t state)
{
@ -516,14 +498,90 @@ int __init clk_init(void)
return ret;
}
static int __init clk_proc_init(void)
{
struct proc_dir_entry *p;
p = create_proc_read_entry("clocks", S_IRUSR, NULL,
show_clocks, NULL);
if (unlikely(!p))
return -EINVAL;
/*
* debugfs support to trace clock tree hierarchy and attributes
*/
static struct dentry *clk_debugfs_root;
static int clk_debugfs_register_one(struct clk *c)
{
int err;
struct dentry *d, *child;
struct clk *pa = c->parent;
char s[255];
char *p = s;
p += sprintf(p, "%s", c->name);
if (c->id > 0)
sprintf(p, ":%d", c->id);
d = debugfs_create_dir(s, pa ? pa->dentry : clk_debugfs_root);
if (!d)
return -ENOMEM;
c->dentry = d;
d = debugfs_create_u8("usecount", S_IRUGO, c->dentry, (u8 *)&c->usecount);
if (!d) {
err = -ENOMEM;
goto err_out;
}
d = debugfs_create_u32("rate", S_IRUGO, c->dentry, (u32 *)&c->rate);
if (!d) {
err = -ENOMEM;
goto err_out;
}
d = debugfs_create_x32("flags", S_IRUGO, c->dentry, (u32 *)&c->flags);
if (!d) {
err = -ENOMEM;
goto err_out;
}
return 0;
err_out:
d = c->dentry;
list_for_each_entry(child, &d->d_subdirs, d_u.d_child)
debugfs_remove(child);
debugfs_remove(c->dentry);
return err;
}
static int clk_debugfs_register(struct clk *c)
{
int err;
struct clk *pa = c->parent;
if (pa && !pa->dentry) {
err = clk_debugfs_register(pa);
if (err)
return err;
}
if (!c->dentry) {
err = clk_debugfs_register_one(c);
if (err)
return err;
}
return 0;
}
subsys_initcall(clk_proc_init);
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, &clock_list, node) {
err = clk_debugfs_register(c);
if (err)
goto err_out;
}
return 0;
err_out:
debugfs_remove(clk_debugfs_root); /* REVISIT: Cleanup correctly */
return err;
}
late_initcall(clk_debugfs_init);