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Commit 63c20c7c authored by Taniya Das's avatar Taniya Das Committed by Deepak Katragadda
Browse files

clk: Add support to set custom flags with clk_set_flags 



The new API clk_set_flags could be used by hardware specific clock drivers
or clients for specific hardware requirements. These flags could be custom
defined as per hardware needs.

Change-Id: Ia67373ee2b8934c898052c68338fa86cb16070dd
Signed-off-by: default avatarTaniya Das <tdas@codeaurora.org>
parent af39767f

drivers/clk/clk.c

+12 −0
Original line number Diff line number Diff line
@@ -1982,6 +1982,18 @@ bool clk_is_match(const struct clk *p, const struct clk *q) 
}

EXPORT_SYMBOL_GPL(clk_is_match);



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

{

	if (!clk)

		return 0;



	if (!clk->core->ops->set_flags)

		return -EINVAL;



	return clk->core->ops->set_flags(clk->core->hw, flags);

}

EXPORT_SYMBOL_GPL(clk_set_flags);



/***        debugfs support        ***/



#ifdef CONFIG_DEBUG_FS

include/linux/clk-provider.h

+3 −0
Original line number Diff line number Diff line
@@ -177,6 +177,8 @@ struct clk_rate_request { 
 *		directory is provided as an argument.  Called with

 *		prepare_lock held.  Returns 0 on success, -EERROR otherwise.

 *

 * @set_flags: Set custom flags which deal with hardware specifics. Returns 0

 *	       on success, -EERROR otherwise.

 *

 * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow

 * implementations to split any work between atomic (enable) and sleepable
@@ -217,6 +219,7 @@ struct clk_ops { 
	int		(*set_phase)(struct clk_hw *hw, int degrees);

	void		(*init)(struct clk_hw *hw);

	int		(*debug_init)(struct clk_hw *hw, struct dentry *dentry);

	int		(*set_flags)(struct clk_hw *hw, unsigned int flags);

};



/**

include/linux/clk.h

+10 −0
Original line number Diff line number Diff line
@@ -420,6 +420,16 @@ struct clk *clk_get_parent(struct clk *clk); 
 */

struct clk *clk_get_sys(const char *dev_id, const char *con_id);



/**

 * clk_set_flags - set the custom HW specific flags for this clock

 * @clk: clock source

 * @flags: custom flags which would be hardware specific, defined for specific

 *	   hardware.

 *

 * Returns success 0 or negative errno.

 */

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



#else /* !CONFIG_HAVE_CLK */



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