]> git.karo-electronics.de Git - karo-tx-linux.git/blob - drivers/devfreq/exynos/exynos_ppmu.c
Merge remote-tracking branch 'asoc/fix/wm8978' into asoc-linus
[karo-tx-linux.git] / drivers / devfreq / exynos / exynos_ppmu.c
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
18 void 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
29 void 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
35 void exynos_ppmu_start(void __iomem *ppmu_base)
36 {
37         __raw_writel(PPMU_ENABLE, ppmu_base);
38 }
39
40 void exynos_ppmu_stop(void __iomem *ppmu_base)
41 {
42         __raw_writel(PPMU_DISABLE, ppmu_base);
43 }
44
45 unsigned 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 }