1. 根目录:
2. arch
3. arm
4. mach-imx
5. clk.h

#ifndef __MACH_IMX_CLK_H
#define __MACH_IMX_CLK_H

#include <linux/spinlock.h>
#include <linux/clk-provider.h>

extern spinlock_t imx_ccm_lock;

extern void imx_cscmr1_fixup(u32 *val);

struct clk *imx_clk_pllv1(const char *name, const char *parent,
		void __iomem *base);

struct clk *imx_clk_pllv2(const char *name, const char *parent,
		void __iomem *base);

enum imx_pllv3_type {
	IMX_PLLV3_GENERIC,
	IMX_PLLV3_SYS,
	IMX_PLLV3_USB,
	IMX_PLLV3_AV,
	IMX_PLLV3_ENET,
};

struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
		const char *parent_name, void __iomem *base, u32 div_mask);

struct clk *clk_register_gate2(struct device *dev, const char *name,
		const char *parent_name, unsigned long flags,
		void __iomem *reg, u8 bit_idx,
		u8 clk_gate_flags, spinlock_t *lock);

struct clk * imx_obtain_fixed_clock(
			const char *name, unsigned long rate);

static inline struct clk *imx_clk_gate2(const char *name, const char *parent,
		void __iomem *reg, u8 shift)
{
	return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
			shift, 0, &imx_ccm_lock);
}

struct clk *imx_clk_pfd(const char *name, const char *parent_name,
		void __iomem *reg, u8 idx);

struct clk *imx_clk_busy_divider(const char *name, const char *parent_name,
				 void __iomem *reg, u8 shift, u8 width,
				 void __iomem *busy_reg, u8 busy_shift);

struct clk *imx_clk_busy_mux(const char *name, void __iomem *reg, u8 shift,
			     u8 width, void __iomem *busy_reg, u8 busy_shift,
			     const char **parent_names, int num_parents);

struct clk *imx_clk_fixup_divider(const char *name, const char *parent,
				  void __iomem *reg, u8 shift, u8 width,
				  void (*fixup)(u32 *val));

struct clk *imx_clk_fixup_mux(const char *name, void __iomem *reg,
			      u8 shift, u8 width, const char **parents,
			      int num_parents, void (*fixup)(u32 *val));

static inline struct clk *imx_clk_fixed(const char *name, int rate)
{
	return clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
}

static inline struct clk *imx_clk_divider(const char *name, const char *parent,
		void __iomem *reg, u8 shift, u8 width)
{
	return clk_register_divider(NULL, name, parent, CLK_SET_RATE_PARENT,
			reg, shift, width, 0, &imx_ccm_lock);
}

static inline struct clk *imx_clk_divider_flags(const char *name,
		const char *parent, void __iomem *reg, u8 shift, u8 width,
		unsigned long flags)
{
	return clk_register_divider(NULL, name, parent, flags,
			reg, shift, width, 0, &imx_ccm_lock);
}

static inline struct clk *imx_clk_gate(const char *name, const char *parent,
		void __iomem *reg, u8 shift)
{
	return clk_register_gate(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
			shift, 0, &imx_ccm_lock);
}

static inline struct clk *imx_clk_mux(const char *name, void __iomem *reg,
		u8 shift, u8 width, const char **parents, int num_parents)
{
	return clk_register_mux(NULL, name, parents, num_parents,
			CLK_SET_RATE_NO_REPARENT, reg, shift,
			width, 0, &imx_ccm_lock);
}

static inline struct clk *imx_clk_mux_flags(const char *name,
		void __iomem *reg, u8 shift, u8 width, const char **parents,
		int num_parents, unsigned long flags)
{
	return clk_register_mux(NULL, name, parents, num_parents,
			flags | CLK_SET_RATE_NO_REPARENT, reg, shift, width, 0,
			&imx_ccm_lock);
}

static inline struct clk *imx_clk_fixed_factor(const char *name,
		const char *parent, unsigned int mult, unsigned int div)
{
	return clk_register_fixed_factor(NULL, name, parent,
			CLK_SET_RATE_PARENT, mult, div);
}

#endif
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