cpu-freq.h

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/* arch/arm/plat-samsung/include/plat/cpu-freq.h
 *
 * Copyright (c) 2006-2007 Simtec Electronics
 *  http://armlinux.simtec.co.uk/
 *  Ben Dooks <[email protected]>
 *
 * S3C CPU frequency scaling support - driver and board
 *
 * 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.
*/

#include <linux/cpufreq.h>

struct s3c_cpufreq_info;
struct s3c_cpufreq_board;
struct s3c_iotimings;

struct s3c_freq {
    unsigned long   fclk;
    unsigned long   armclk;
    unsigned long   hclk_tns;   /* in 10ths of ns */
    unsigned long   hclk;
    unsigned long   pclk;
};

struct s3c_cpufreq_freqs {
    struct cpufreq_freqs    freqs;
    struct s3c_freq     old;
    struct s3c_freq     new;

    unsigned int        pll_changing:1;
};

#define to_s3c_cpufreq(_cf) container_of(_cf, struct s3c_cpufreq_freqs, freqs)

struct s3c_clkdivs {
    int     p_divisor;
    int     h_divisor;
    int     arm_divisor;
    unsigned char   dvs;
};

#define PLLVAL(_m, _p, _s) (((_m) << 12) | ((_p) << 4) | (_s))

struct s3c_pllval {
    unsigned long       freq;
    unsigned long       pll_reg;
};

struct s3c_cpufreq_board {
    unsigned int    refresh;
    unsigned int    auto_io:1;  /* automatically init io timings. */
    unsigned int    need_io:1;  /* set if needs io timing support. */

    /* any non-zero field in here is taken as an upper limit. */
    struct s3c_freq max;    /* frequency limits */
};

/* Things depending on frequency scaling. */
#ifdef CONFIG_CPU_FREQ_S3C
#define __init_or_cpufreq
#else
#define __init_or_cpufreq __init
#endif

/* Board functions */

#ifdef CONFIG_CPU_FREQ_S3C
extern int s3c_cpufreq_setboard(struct s3c_cpufreq_board *board);
#else

static inline int s3c_cpufreq_setboard(struct s3c_cpufreq_board *board)
{
    return 0;
}
#endif  /* CONFIG_CPU_FREQ_S3C */