/*
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License version 2 as published
 *  by the Free Software Foundation.
 *
 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
 * Copyright (C) 2013 Lei Chuanhua <Chuanhua.lei@lantiq.com>
 */

#ifndef _LTQ_CLK_H__
#define _LTQ_CLK_H__

#include <linux/clkdev.h>

/* clock speeds */
#define CLOCK_33M 33333333
#define CLOCK_60M 60000000
#define CLOCK_62_5M 62500000
#define CLOCK_83M 83333333
#define CLOCK_83_5M 83500000
#define CLOCK_98_304M 98304000
#define CLOCK_100M 100000000
#define CLOCK_111M 111111111
#define CLOCK_125M 125000000
#define CLOCK_133M 133333333
#define CLOCK_150M 150000000
#define CLOCK_166M 166666666
#define CLOCK_167M 166666667
#define CLOCK_180M 180000000
#define CLOCK_196_608M 196608000
#define CLOCK_200M 200000000
#define CLOCK_222M 222000000
#define CLOCK_240M 240000000
#define CLOCK_250M 250000000
#define CLOCK_266M 266666666
#define CLOCK_288M 288888888
#define CLOCK_300M 300000000
#define CLOCK_333M 333333333
#define CLOCK_360M 360000000
#define CLOCK_393M 393215332
#define CLOCK_400M 400000000
#define CLOCK_432M 432000000
#define CLOCK_450M 450000000
#define CLOCK_500M 500000000
#define CLOCK_600M 600000000
#define CLOCK_666M 666666666
#define CLOCK_720M 720000000

/* clock out speeds */
#define CLOCK_32_768K 32768
#define CLOCK_1_536M 1536000
#define CLOCK_2_5M 2500000
#define CLOCK_12M 12000000
#define CLOCK_24M 24000000
#define CLOCK_25M 25000000
#define CLOCK_30M 30000000
#define CLOCK_40M 40000000
#define CLOCK_48M 48000000
#define CLOCK_50M 50000000
#define CLOCK_60M 60000000

enum {
	STATIC_CPU_CLK = 1,
	STATIC_FPI_CLK,
	STATIC_IO_CLK,
	STATIC_PPE_CLK,
	STATIC_NO_PARENT = 0xff,
};

struct clk_rates {
	unsigned int cpu_freq;
	unsigned int ddr_freq;
	unsigned int cgu_sys;
};

struct clk {
	struct clk_lookup cl;
	unsigned long rate;
	unsigned long *rates;
	unsigned int module;
	unsigned int bits;
	unsigned int parent;
	unsigned int scale_data;
	atomic_t refcount;
	bool always_on; /* 0 -- always on or not used, 1 -- configurable */
	unsigned long (*get_rate)(void);
	int (*set_rate)(unsigned long cpu_freq);
	int (*enable)(struct clk *clk);
	void (*disable)(struct clk *clk);
	int (*activate)(struct clk *clk);
	void (*deactivate)(struct clk *clk);
	void (*reboot)(struct clk *clk);
};

/*
extern void clkdev_add_static(unsigned long cpu, unsigned long fpi,
				unsigned long io, unsigned long ppe);
*/
extern unsigned long ltq_grx500_cpu_hz(void);
extern int ltq_grx500_set_cpu_hz(unsigned long cpu_freq);

extern unsigned long ltq_grx500_fpi_hz(void);
extern int ltq_grx500_set_fpi_hz(unsigned long cpu_freq);

unsigned long *ltq_get_avail_scaling_rates(int sel);

#endif