drivers/clk/sprd/div.h

Source file repositories/reference/linux-study-clean/drivers/clk/sprd/div.h

File Facts

System
Linux kernel
Corpus path
drivers/clk/sprd/div.h
Extension
.h
Size
2386 bytes
Lines
86
Domain
Driver Families
Bucket
drivers/clk
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct sprd_div_internal {
	s32	offset;
	u8	shift;
	u8	width;
};

#define _SPRD_DIV_CLK(_offset, _shift, _width)	\
	{				\
		.offset = _offset,	\
		.shift	= _shift,	\
		.width	= _width,	\
	}

struct sprd_div {
	struct sprd_div_internal	div;
	struct sprd_clk_common	common;
};

#define SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, _offset,	\
				_shift, _width, _flags, _fn)		\
	struct sprd_div _struct = {					\
		.div	= _SPRD_DIV_CLK(_offset, _shift, _width),	\
		.common	= {						\
			.regmap		= NULL,				\
			.reg		= _reg,				\
			.hw.init	= _fn(_name, _parent,		\
					      &sprd_div_ops, _flags),	\
		}							\
	}

#define SPRD_DIV_CLK(_struct, _name, _parent, _reg,			\
		     _shift, _width, _flags)				\
	SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0,	\
				_shift, _width, _flags, CLK_HW_INIT)

#define SPRD_DIV_CLK_FW_NAME(_struct, _name, _parent, _reg,		\
			_shift, _width, _flags)				\
	SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0,	\
				_shift, _width, _flags, CLK_HW_INIT_FW_NAME)

#define SPRD_DIV_CLK_HW(_struct, _name, _parent, _reg,			\
			_shift, _width, _flags)				\
	SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0,	\
				_shift, _width, _flags, CLK_HW_INIT_HW)

static inline struct sprd_div *hw_to_sprd_div(const struct clk_hw *hw)
{
	struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);

	return container_of(common, struct sprd_div, common);
}

unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common,
					  const struct sprd_div_internal *div,
					  unsigned long parent_rate);

int sprd_div_helper_set_rate(const struct sprd_clk_common *common,
			     const struct sprd_div_internal *div,
			     unsigned long rate,
			     unsigned long parent_rate);

extern const struct clk_ops sprd_div_ops;

#endif /* _SPRD_DIV_H_ */

Annotation

Implementation Notes