diff options
Diffstat (limited to 'src/cpu/samsung/exynos5250/exynos-cpufreq.h')
| -rw-r--r-- | src/cpu/samsung/exynos5250/exynos-cpufreq.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5250/exynos-cpufreq.h b/src/cpu/samsung/exynos5250/exynos-cpufreq.h new file mode 100644 index 0000000000..1c28e77ea4 --- /dev/null +++ b/src/cpu/samsung/exynos5250/exynos-cpufreq.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * EXYNOS - CPU frequency scaling support + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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. + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* Define various levels of ARM frequency */ +enum cpufreq_level { + CPU_FREQ_L200, /* 200 MHz */ + CPU_FREQ_L300, /* 300 MHz */ + CPU_FREQ_L400, /* 400 MHz */ + CPU_FREQ_L500, /* 500 MHz */ + CPU_FREQ_L600, /* 600 MHz */ + CPU_FREQ_L700, /* 700 MHz */ + CPU_FREQ_L800, /* 800 MHz */ + CPU_FREQ_L900, /* 900 MHz */ + CPU_FREQ_L1000, /* 1000 MHz */ + CPU_FREQ_L1100, /* 1100 MHz */ + CPU_FREQ_L1200, /* 1200 MHz */ + CPU_FREQ_L1300, /* 1300 MHz */ + CPU_FREQ_L1400, /* 1400 MHz */ + CPU_FREQ_L1500, /* 1500 MHz */ + CPU_FREQ_L1600, /* 1600 MHz */ + CPU_FREQ_L1700, /* 1700 MHz */ + CPU_FREQ_LCOUNT, +}; + +/* + * Initialize ARM frequency scaling + * + * @param blob FDT blob + * @return int value, 0 for success + */ +int exynos5250_cpufreq_init(const void *blob); + +/* + * Switch ARM frequency to new level + * + * @param new_freq_level enum cpufreq_level, states new frequency + * @return int value, 0 for success + */ +int exynos5250_set_frequency(enum cpufreq_level new_freq_level); |