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.dan...@samsung.com> wrote: > From: Amit Daniel Kachhap <amit.dan...@samsung.com> > > This patch adds support for clock information exposed to debug-fs > interface. > > Signed-off-by: Amit Daniel Kachhap <amit.dan...@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 > > > _______________________________________________ > linaro-dev mailing list > linaro-dev@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-dev >
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