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Commit 08d7924e authored by Taniya Das's avatar Taniya Das
Browse files

clk: Add support to enumerate frequencies 



The new clock api which would enumerate the frequency for a given index.

Change-Id: I01a4ea766a5f9d0a965fcc621aa98df4de206570
Signed-off-by: default avatarTaniya Das <tdas@codeaurora.org>
parent 492b05c7

drivers/clk/clk.c

+15 −0
Original line number Diff line number Diff line
@@ -2329,6 +2329,21 @@ int clk_set_flags(struct clk *clk, unsigned long flags) 
}

EXPORT_SYMBOL_GPL(clk_set_flags);



unsigned long clk_list_frequency(struct clk *clk, unsigned int index)

{

	int ret = 0;



	if (!clk || !clk->core->ops->list_rate)

		return -EINVAL;



	clk_prepare_lock();

	ret = clk->core->ops->list_rate(clk->core->hw, index, ULONG_MAX);

	clk_prepare_unlock();



	return ret;

}

EXPORT_SYMBOL_GPL(clk_list_frequency);



/***        debugfs support        ***/



#ifdef CONFIG_DEBUG_FS

include/linux/clk.h

+10 −0
Original line number Diff line number Diff line
@@ -430,6 +430,16 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id); 
 */

int clk_set_flags(struct clk *clk, unsigned long flags);



/**

 * clk_list_frequnecy - enumerate supported frequencies

 * @clk: clock source

 * @index: identify frequency to list

 *

 * Returns a non-negative integer frequency for success

 * or negative errno in case of failure.

 */

unsigned long clk_list_frequency(struct clk *clk, unsigned int index);



#else /* !CONFIG_HAVE_CLK */



static inline struct clk *clk_get(struct device *dev, const char *id)