| /* arch/arm/plat-s3c/include/plat/cpu-freq.h |
| * |
| * Copyright (c) 2006,2007 Simtec Electronics |
| * http://armlinux.simtec.co.uk/ |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * 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; |
| }; |
| |
| /* wrapper 'struct cpufreq_freqs' so that any drivers receiving the |
| * notification can use this information that is not provided by just |
| * having the core frequency alone. |
| */ |
| |
| struct s3c_cpufreq_freqs { |
| struct cpufreq_freqs freqs; |
| struct s3c_freq old; |
| struct s3c_freq new; |
| }; |
| |
| #define to_s3c_cpufreq(_cf) container_of(_cf, struct s3c_cpufreq_freqs, freqs) |
| |
| struct s3c_clkdivs { |
| int p_divisor; /* fclk / pclk */ |
| int h_divisor; /* fclk / hclk */ |
| int arm_divisor; /* not all cpus have this. */ |
| unsigned char dvs; /* using dvs mode to arm. */ |
| }; |
| |
| #define PLLVAL(_m, _p, _s) (((_m) << 12) | ((_p) << 4) | (_s)) |
| |
| struct s3c_pllval { |
| unsigned long freq; |
| unsigned long pll_reg; |
| }; |
| |
| struct s3c_cpufreq_config { |
| struct s3c_freq freq; |
| struct s3c_pllval pll; |
| struct s3c_clkdivs divs; |
| struct s3c_cpufreq_info *info; /* for core, not drivers */ |
| struct s3c_cpufreq_board *board; |
| }; |
| |
| /* s3c_cpufreq_board |
| * |
| * per-board configuraton information, such as memory refresh and |
| * how to initialise IO timings. |
| */ |
| struct s3c_cpufreq_board { |
| unsigned int refresh; /* refresh period in ns */ |
| 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 */ |