LXR linux/drivers/devfreq/exynos/exynos

   1/*
   2 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   3 *              http://www.samsung.com/
   4 *
   5 * EXYNOS - PPMU support
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#include <linux/kernel.h>
  13#include <linux/types.h>
  14#include <linux/io.h>
  15
  16#include "exynos_ppmu.h"
  17
  18void exynos_ppmu_reset(void __iomem *ppmu_base)
  19{
  20        __raw_writel(PPMU_CYCLE_RESET | PPMU_COUNTER_RESET, ppmu_base);
  21        __raw_writel(PPMU_ENABLE_CYCLE  |
  22                     PPMU_ENABLE_COUNT0 |
  23                     PPMU_ENABLE_COUNT1 |
  24                     PPMU_ENABLE_COUNT2 |
  25                     PPMU_ENABLE_COUNT3,
  26                     ppmu_base + PPMU_CNTENS);
  27}
  28
  29void exynos_ppmu_setevent(void __iomem *ppmu_base, unsigned int ch,
  30                        unsigned int evt)
  31{
  32        __raw_writel(evt, ppmu_base + PPMU_BEVTSEL(ch));
  33}
  34
  35void exynos_ppmu_start(void __iomem *ppmu_base)
  36{
  37        __raw_writel(PPMU_ENABLE, ppmu_base);
  38}
  39
  40void exynos_ppmu_stop(void __iomem *ppmu_base)
  41{
  42        __raw_writel(PPMU_DISABLE, ppmu_base);
  43}
  44
  45unsigned int exynos_ppmu_read(void __iomem *ppmu_base, unsigned int ch)
  46{
  47        unsigned int total;
  48
  49        if (ch == PPMU_PMNCNT3)
  50                total = ((__raw_readl(ppmu_base + PMCNT_OFFSET(ch)) << 8) |
  51                          __raw_readl(ppmu_base + PMCNT_OFFSET(ch + 1)));
  52        else
  53                total = __raw_readl(ppmu_base + PMCNT_OFFSET(ch));
  54
  55        return total;
  56}
  57