Hi Yong,
Looks good, just a couple of things:
> diff --git a/arch/arm/common/clkdev.c b/arch/arm/common/clkdev.c
> index 9e4c4d9..cf81e70 100644
> --- a/arch/arm/common/clkdev.c
> +++ b/arch/arm/common/clkdev.c
Why not do this in the core clock code (kernel/clk.c) instead? No need to make
it ARM-specific.
> diff --git a/arch/arm/plat-mxc/clock-common.c
> b/arch/arm/plat-mxc/clock-common.c
> index 8911813..20d38a8 100644
> --- a/arch/arm/plat-mxc/clock-common.c
> +++ b/arch/arm/plat-mxc/clock-common.c
> @@ -97,7 +97,10 @@ unsigned long clk_mxc_get_rate(struct clk *_clk)
> if (clk->get_rate)
> return clk->get_rate(clk);
>
> - return clk_get_rate(clk->parent);
> + if (clk->parent)
> + return clk_get_rate(clk->parent);
> +
> + return 0;
> }
>
> /* Round the requested clock rate to the nearest supported
> diff --git a/include/linux/clk.h b/include/linux/clk.h
> index 56416b7..1102c2c 100644
> --- a/include/linux/clk.h
> +++ b/include/linux/clk.h
> @@ -44,17 +44,31 @@ struct device;
> * registered with the arch-specific clock management code; the clock
> driver
> * code does not need to handle these.
> */
> +#define CLK_NAME_LEN 16
We might need more than 16 bytes here; 32 should be fine.
> struct clk {
> const struct clk_ops *ops;
> unsigned int enable_count;
> struct mutex mutex;
> +#ifdef CONFIG_CLK_DEBUG
> + char name[CLK_NAME_LEN];
> + struct dentry *dentry;
> +#endif
> };
>
> -#define INIT_CLK(name, o) { \
> +#ifndef CONFIG_CLK_DEBUG
> +#define INIT_CLK(clk_name, o) { \
> .ops = &o, \
> .enable_count = 0, \
> - .mutex = __MUTEX_INITIALIZER(name.mutex), \
> + .mutex = __MUTEX_INITIALIZER(clk_name.mutex), \
> }
> +#else
> +#define INIT_CLK(clk_name, o) { \
> + .ops = &o, \
> + .enable_count = 0, \
> + .mutex = __MUTEX_INITIALIZER(clk_name.mutex), \
> + .name = #clk_name, \
> +}
> +#endif
How about this instead:
+#ifdef CONFIG_CLK_DEBUG
+#define __INIT_CLK_DEBUG(n) .name = #n,
+#else
+#define __INIT_CLK_DEBUG(n)
+#endif
+
/* static initialiser for non-atomic clocks */
#define INIT_CLK(name, o) { \
.ops = &o, \
.enable_count = 0, \
.flags = 0, \
.lock.mutex = __MUTEX_INITIALIZER(name.lock.mutex), \
+ __INIT_CLK_DEBUG(name) \
}
/* static initialiser for atomic clocks */
- otherwise, you're going to need to add another definition of INIT_CLK_ATOMIC
too, giving four in total.
Cheers,
Jeremy
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