Amit Daniel Kachhap wrote:
This patch adds support for clock information exposed to debug-fs
interface.
Signed-off-by: Amit Daniel Kachhap amit.daniel@samsung.com
Code modified for V2 version are, a)Inserted the debug-fs code inside macro CONFIG_PM_DEBUG as suggested by yong.shen@linaro.org.
Could you please let me know why?
b)Removed macro CONFIG_PLAT_SAMSUNG and implemented other coding standards as suggested by kgene.kim@samsung.com
arch/arm/plat-samsung/clock.c | 91 ++++++++++++++++++++++++++++ arch/arm/plat-samsung/include/plat/clock.h | 3 + 2 files changed, 94 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c index e8d20b0..029a49d 100644 --- a/arch/arm/plat-samsung/clock.c +++ b/arch/arm/plat-samsung/clock.c @@ -39,6 +39,9 @@ #include <linux/clk.h> #include <linux/spinlock.h> #include <linux/io.h> +#if defined(CONFIG_DEBUG_FS) +#include <linux/debugfs.h> +#endif
#include <mach/hardware.h> #include <asm/irq.h> @@ -447,3 +450,91 @@ int __init s3c24xx_register_baseclocks(unsigned long xtal) return 0; }
+#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
Hmm...please let me know the reason...
+/* 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, *child_tmp;
- struct clk *pa = c->parent;
- char s[255];
- char *p = s;
- p += sprintf(p, "%s", c->name);
- /*Append id field with name also*/
No need above comment. If required, please add other comments also.
- if (c->id >= 0)
sprintf(p, ":%d", c->id);- d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root);
- if (!d)
return -ENOMEM;- c->dent = d;
- d = debugfs_create_u8("usecount", S_IRUGO, c->dent, (u8
*)&c->usage);
- if (!d) {
err = -ENOMEM;goto err_out;- }
1 empty line would be helpful to read.
- d = debugfs_create_u32("rate", S_IRUGO, c->dent, (u32 *)&c->rate);
- if (!d) {
err = -ENOMEM;goto err_out;- }
- return 0;
+err_out:
- d = c->dent;
- list_for_each_entry_safe(child, child_tmp, &d->d_subdirs,
d_u.d_child)
debugfs_remove(child);- debugfs_remove(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, list) {
err = clk_debugfs_register(c);if (err)goto err_out;- }
- 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) */
No need last one empty line.
diff --git a/arch/arm/plat-samsung/include/plat/clock.h b/arch/arm/plat- samsung/include/plat/clock.h index 0fbcd0e..9a82b88 100644 --- a/arch/arm/plat-samsung/include/plat/clock.h +++ b/arch/arm/plat-samsung/include/plat/clock.h @@ -47,6 +47,9 @@ struct clk {
struct clk_ops *ops; int (*enable)(struct clk *, int enable); +#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
- struct dentry *dent; /* For visible tree hierarchy */
+#endif };
/* other clocks which may be registered by board support */
Thanks.
Best regards, Kgene. -- Kukjin Kim kgene.kim@samsung.com, Senior Engineer, SW Solution Development Team, Samsung Electronics Co., Ltd.