1 /* linux/arch/arm/mach-exynos4/dev-pd.c
2 *
3 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * EXYNOS4 - Power Domain support
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/io.h>
14 #include <linux/kernel.h>
15 #include <linux/platform_device.h>
16 #include <linux/delay.h>
17
18 #include <mach/regs-pmu.h>
19
20 #include <plat/pd.h>
21
exynos4_pd_enable(struct device * dev)22 static int exynos4_pd_enable(struct device *dev)
23 {
24 struct samsung_pd_info *pdata = dev->platform_data;
25 u32 timeout;
26
27 __raw_writel(S5P_INT_LOCAL_PWR_EN, pdata->base);
28
29 /* Wait max 1ms */
30 timeout = 10;
31 while ((__raw_readl(pdata->base + 0x4) & S5P_INT_LOCAL_PWR_EN)
32 != S5P_INT_LOCAL_PWR_EN) {
33 if (timeout == 0) {
34 printk(KERN_ERR "Power domain %s enable failed.\n",
35 dev_name(dev));
36 return -ETIMEDOUT;
37 }
38 timeout--;
39 udelay(100);
40 }
41
42 return 0;
43 }
44
exynos4_pd_disable(struct device * dev)45 static int exynos4_pd_disable(struct device *dev)
46 {
47 struct samsung_pd_info *pdata = dev->platform_data;
48 u32 timeout;
49
50 __raw_writel(0, pdata->base);
51
52 /* Wait max 1ms */
53 timeout = 10;
54 while (__raw_readl(pdata->base + 0x4) & S5P_INT_LOCAL_PWR_EN) {
55 if (timeout == 0) {
56 printk(KERN_ERR "Power domain %s disable failed.\n",
57 dev_name(dev));
58 return -ETIMEDOUT;
59 }
60 timeout--;
61 udelay(100);
62 }
63
64 return 0;
65 }
66
67 struct platform_device exynos4_device_pd[] = {
68 {
69 .name = "samsung-pd",
70 .id = 0,
71 .dev = {
72 .platform_data = &(struct samsung_pd_info) {
73 .enable = exynos4_pd_enable,
74 .disable = exynos4_pd_disable,
75 .base = S5P_PMU_MFC_CONF,
76 },
77 },
78 }, {
79 .name = "samsung-pd",
80 .id = 1,
81 .dev = {
82 .platform_data = &(struct samsung_pd_info) {
83 .enable = exynos4_pd_enable,
84 .disable = exynos4_pd_disable,
85 .base = S5P_PMU_G3D_CONF,
86 },
87 },
88 }, {
89 .name = "samsung-pd",
90 .id = 2,
91 .dev = {
92 .platform_data = &(struct samsung_pd_info) {
93 .enable = exynos4_pd_enable,
94 .disable = exynos4_pd_disable,
95 .base = S5P_PMU_LCD0_CONF,
96 },
97 },
98 }, {
99 .name = "samsung-pd",
100 .id = 3,
101 .dev = {
102 .platform_data = &(struct samsung_pd_info) {
103 .enable = exynos4_pd_enable,
104 .disable = exynos4_pd_disable,
105 .base = S5P_PMU_LCD1_CONF,
106 },
107 },
108 }, {
109 .name = "samsung-pd",
110 .id = 4,
111 .dev = {
112 .platform_data = &(struct samsung_pd_info) {
113 .enable = exynos4_pd_enable,
114 .disable = exynos4_pd_disable,
115 .base = S5P_PMU_TV_CONF,
116 },
117 },
118 }, {
119 .name = "samsung-pd",
120 .id = 5,
121 .dev = {
122 .platform_data = &(struct samsung_pd_info) {
123 .enable = exynos4_pd_enable,
124 .disable = exynos4_pd_disable,
125 .base = S5P_PMU_CAM_CONF,
126 },
127 },
128 }, {
129 .name = "samsung-pd",
130 .id = 6,
131 .dev = {
132 .platform_data = &(struct samsung_pd_info) {
133 .enable = exynos4_pd_enable,
134 .disable = exynos4_pd_disable,
135 .base = S5P_PMU_GPS_CONF,
136 },
137 },
138 },
139 };
140