clk: define and export clk_debugs_add_file (fb2b3c9f) · Commits · 戴 / test

Define and export a new function clk_debugs_add_file which adds a file to a existing clock's debugfs directory. This can be used by clock providers to add debugfs entries which are not related to a specific clock type. Examples include the ability to measure the rate of a clock. It can also be used by modules to create new debugfs entries. This is useful if you want to expose features for testing which can potentially cause system instability such as allowing to change a clock's rate from userspace. Signed-off-by:

Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by:

Mike Turquette <mturquette@linaro.org>

drivers/clk/clk.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -358,6 +358,18 @@ static void clk_debug_unregister(struct clk *clk)
		debugfs_remove_recursive(clk->dentry);
		}

		struct dentry clk_debugfs_add_file(struct clk clk, char *name, umode_t mode,
		void data, const struct file_operations fops)
		{
		struct dentry *d = NULL;

		if (clk->dentry)
		d = debugfs_create_file(name, mode, clk->dentry, data, fops);

		return d;
		}
		EXPORT_SYMBOL_GPL(clk_debugfs_add_file);

		/**
		* clk_debug_init - lazily create the debugfs clk tree visualization
		*

include/linux/clk-provider.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -619,5 +619,10 @@ static inline void clk_writel(u32 val, u32 __iomem *reg)

		#endif /* platform dependent I/O accessors */

		#ifdef CONFIG_DEBUG_FS
		struct dentry clk_debugfs_add_file(struct clk clk, char *name, umode_t mode,
		void data, const struct file_operations fops);
		#endif

		#endif /* CONFIG_COMMON_CLK */
		#endif /* CLK_PROVIDER_H */

Admin message