drivers/clk/pxa/clk-pxa.h

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

File Facts

System
Linux kernel
Corpus path
drivers/clk/pxa/clk-pxa.h
Extension
.h
Size
4984 bytes
Lines
163
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 desc_clk_cken {
	struct clk_hw hw;
	int ckid;
	int cken_reg;
	const char *name;
	const char *dev_id;
	const char *con_id;
	const char * const *parent_names;
	struct clk_fixed_factor lp;
	struct clk_fixed_factor hp;
	struct clk_gate gate;
	bool (*is_in_low_power)(void);
	const unsigned long flags;
};

#define PXA_CKEN(_dev_id, _con_id, _name, parents, _mult_lp, _div_lp,	\
		 _mult_hp, _div_hp, is_lp, _cken_reg, _cken_bit, flag)	\
	{ .ckid = CLK_ ## _name, .name = #_name,			\
	  .cken_reg = _cken_reg,					\
	  .dev_id = _dev_id, .con_id = _con_id,	.parent_names = parents,\
	  .lp = { .mult = _mult_lp, .div = _div_lp },			\
	  .hp = { .mult = _mult_hp, .div = _div_hp },			\
	  .is_in_low_power = is_lp,					\
	  .gate = { .bit_idx = _cken_bit }, \
	  .flags = flag,						\
	}
#define PXA_CKEN_1RATE(dev_id, con_id, name, parents, cken_reg,		\
			    cken_bit, flag)				\
	PXA_CKEN(dev_id, con_id, name, parents, 1, 1, 1, 1,		\
		 NULL, cken_reg, cken_bit, flag)

struct pxa2xx_freq {
	unsigned long cpll;
	unsigned int membus_khz;
	unsigned int cccr;
	unsigned int div2;
	unsigned int clkcfg;
};

static inline int dummy_clk_set_parent(struct clk_hw *hw, u8 index)
{
	return 0;
}

extern void clkdev_pxa_register(int ckid, const char *con_id,
				const char *dev_id, struct clk *clk);
extern int clk_pxa_cken_init(const struct desc_clk_cken *clks,
			     int nb_clks, void __iomem *clk_regs);
void clk_pxa_dt_common_init(struct device_node *np);

void pxa2xx_core_turbo_switch(bool on);
void pxa2xx_cpll_change(struct pxa2xx_freq *freq,
			u32 (*mdrefr_dri)(unsigned int),
			void __iomem *cccr);
int pxa2xx_determine_rate(struct clk_rate_request *req,
			  struct pxa2xx_freq *freqs,  int nb_freqs);

#endif

Annotation

Implementation Notes