1. 根目录:
2. drivers
3. clk
4. mxs
5. clk.h

/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#ifndef __MXS_CLK_H
#define __MXS_CLK_H

struct clk;

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

#define SET	0x4
#define CLR	0x8

extern spinlock_t mxs_lock;

int mxs_clk_wait(void __iomem *reg, u8 shift);

struct clk *mxs_clk_pll(const char *name, const char *parent_name,
			void __iomem *base, u8 power, unsigned long rate);

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

struct clk *mxs_clk_div(const char *name, const char *parent_name,
			void __iomem *reg, u8 shift, u8 width, u8 busy);

struct clk *mxs_clk_frac(const char *name, const char *parent_name,
			 void __iomem *reg, u8 shift, u8 width, u8 busy);

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

static inline struct clk *mxs_clk_gate(const char *name,
			const char *parent_name, void __iomem *reg, u8 shift)
{
	return clk_register_gate(NULL, name, parent_name, CLK_SET_RATE_PARENT,
				 reg, shift, CLK_GATE_SET_TO_DISABLE,
				 &mxs_lock);
}

static inline struct clk *mxs_clk_mux(const char *name, void __iomem *reg,
		u8 shift, u8 width, const char *const *parent_names, int num_parents)
{
	return clk_register_mux(NULL, name, parent_names, num_parents,
				CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
				reg, shift, width, 0, &mxs_lock);
}

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

#endif /* __MXS_CLK_H */