Commit 99600fd4 authored by Chen-Yu Tsai's avatar Chen-Yu Tsai
Browse files

clk: Add CLK_HW_INIT_* macros using .parent_hws 



With the new clk parenting code, struct clk_init_data was expanded to
include .parent_hws, for clk drivers to directly list parents by
pointing to their respective struct clk_hw's.

Add macros that can take either one single struct clk_hw *, or an array
of them, for drivers to use.

A special CLK_HW_INIT_HWS macro is included, which takes an array of
struct clk_hw *, but sets .num_parents to 1. This variant is to allow
the reuse of the array, instead of having a compound literal allocated
for each clk sharing the same parent.

Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
parent 2d156b78

include/linux/clk-provider.h

+32 −0
Original line number Diff line number Diff line
@@ -904,6 +904,29 @@ extern struct of_device_id __clk_of_table; 
		.ops		= _ops,				\

	})



#define CLK_HW_INIT_HW(_name, _parent, _ops, _flags)			\

	(&(struct clk_init_data) {					\

		.flags		= _flags,				\

		.name		= _name,				\

		.parent_hws	= (const struct clk_hw*[]) { _parent },	\

		.num_parents	= 1,					\

		.ops		= _ops,					\

	})



/*

 * This macro is intended for drivers to be able to share the otherwise

 * individual struct clk_hw[] compound literals created by the compiler

 * when using CLK_HW_INIT_HW. It does NOT support multiple parents.

 */

#define CLK_HW_INIT_HWS(_name, _parent, _ops, _flags)			\

	(&(struct clk_init_data) {					\

		.flags		= _flags,				\

		.name		= _name,				\

		.parent_hws	= _parent,				\

		.num_parents	= 1,					\

		.ops		= _ops,					\

	})



#define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags)	\

	(&(struct clk_init_data) {				\

		.flags		= _flags,			\
@@ -913,6 +936,15 @@ extern struct of_device_id __clk_of_table; 
		.ops		= _ops,				\

	})



#define CLK_HW_INIT_PARENTS_HW(_name, _parents, _ops, _flags)	\

	(&(struct clk_init_data) {				\

		.flags		= _flags,			\

		.name		= _name,			\

		.parent_hws	= _parents,			\

		.num_parents	= ARRAY_SIZE(_parents),		\

		.ops		= _ops,				\

	})



#define CLK_HW_INIT_NO_PARENT(_name, _ops, _flags)	\

	(&(struct clk_init_data) {			\

		.flags          = _flags,		\

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