Yong,
No. The work that you're doing is long-term. It will take time for platforms to move to the common struct clk - almost unlikely for the next Linaro release.
In the short-term, we still need all partner platforms to expose this debug information for our tools in a consistent way - OMAP already does it this way. So we want this patch applied to the Samsung platform after review and similar ones for other SoC kernels.
/Amit
On 10 Nov 16, Yong Shen wrote:
Hi Amit,
We are trying to make this clock debug interface generic, so every platform can benefit from it. Maybe it is better to wait for a while until the common interface comes out.
Yong
On Tue, Nov 16, 2010 at 6:54 PM, amit.daniel@samsung.com wrote:
From: Amit Daniel Kachhap amit.daniel@samsung.com
This patch adds support for clock information exposed to debug-fs interface.
Signed-off-by: Amit Daniel Kachhap amit.daniel@samsung.com
arch/arm/plat-samsung/clock.c | 92 ++++++++++++++++++++++++++++ arch/arm/plat-samsung/include/plat/clock.h | 3 + 2 files changed, 95 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c index e8d20b0..0ba209d 100644 --- a/arch/arm/plat-samsung/clock.c +++ b/arch/arm/plat-samsung/clock.c @@ -39,6 +39,7 @@ #include <linux/clk.h> #include <linux/spinlock.h> #include <linux/io.h> +#include <linux/debugfs.h>
#include <mach/hardware.h> #include <asm/irq.h> @@ -447,3 +448,94 @@ int __init s3c24xx_register_baseclocks(unsigned long xtal) return 0; }
+#if defined(CONFIG_DEBUG_FS) +/*
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);+#ifdef CONFIG_PLAT_SAMSUNG
/*Append id field with name also*/if (c->id >= 0)p += sprintf(p, ":%d", c->id);+#endif
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;}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_DEBUG_FS) */
diff --git a/arch/arm/plat-samsung/include/plat/clock.h b/arch/arm/plat-samsung/include/plat/clock.h index 0fbcd0e..f6180ab 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_DEBUG_FS)
struct dentry *dent; /* For visible tree hierarchy */+#endif };
/* other clocks which may be registered by board support */
1.6.0.6
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