diff options
author | Paul Mundt <lethal@linux-sh.org> | 2009-05-13 21:51:28 +0900 |
---|---|---|
committer | Paul Mundt <lethal@linux-sh.org> | 2009-05-13 21:51:28 +0900 |
commit | cedcf3366f2191885aff92d33d6078ef08203e52 (patch) | |
tree | 23d46b2735b7ab2df213751fcf50d667596ae3ae /arch/sh/kernel/cpu/clock.c | |
parent | cc96eace48fdf0f8925a74c6c1f7ffa512e458d2 (diff) | |
download | linux-cedcf3366f2191885aff92d33d6078ef08203e52.tar.bz2 |
sh: clkfwk: Map tree hierarchy in debugfs.
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>
Diffstat (limited to 'arch/sh/kernel/cpu/clock.c')
-rw-r--r-- | arch/sh/kernel/cpu/clock.c | 110 |
1 files changed, 84 insertions, 26 deletions
diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c index 56c6e11fa83b..686477f8ae5b 100644 --- a/arch/sh/kernel/cpu/clock.c +++ b/arch/sh/kernel/cpu/clock.c @@ -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) +/* + * debugfs support to trace clock tree hierarchy and attributes + */ +static struct dentry *clk_debugfs_root; + +static int clk_debugfs_register_one(struct clk *c) { - struct proc_dir_entry *p; - p = create_proc_read_entry("clocks", S_IRUSR, NULL, - show_clocks, NULL); - if (unlikely(!p)) - return -EINVAL; + 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; +} + +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; } -subsys_initcall(clk_proc_init); +late_initcall(clk_debugfs_init); |