2 * Exynos Generic power domain support.
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
7 * Implementation of Exynos specific power domain control which is used in
8 * conjunction with runtime-pm. Support for both device-tree and non-device-tree
9 * based power domain support is included.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
17 #include <linux/err.h>
18 #include <linux/slab.h>
19 #include <linux/pm_domain.h>
20 #include <linux/delay.h>
21 #include <linux/of_address.h>
23 #include <mach/regs-pmu.h>
24 #include <plat/devs.h>
27 * Exynos specific wrapper around the generic power domain
29 struct exynos_pm_domain
{
33 struct generic_pm_domain pd
;
36 static int exynos_pd_power(struct generic_pm_domain
*domain
, bool power_on
)
38 struct exynos_pm_domain
*pd
;
43 pd
= container_of(domain
, struct exynos_pm_domain
, pd
);
46 pwr
= power_on
? S5P_INT_LOCAL_PWR_EN
: 0;
47 __raw_writel(pwr
, base
);
52 while ((__raw_readl(base
+ 0x4) & S5P_INT_LOCAL_PWR_EN
) != pwr
) {
54 op
= (power_on
) ? "enable" : "disable";
55 pr_err("Power domain %s %s failed\n", domain
->name
, op
);
60 usleep_range(80, 100);
65 static int exynos_pd_power_on(struct generic_pm_domain
*domain
)
67 return exynos_pd_power(domain
, true);
70 static int exynos_pd_power_off(struct generic_pm_domain
*domain
)
72 return exynos_pd_power(domain
, false);
75 #define EXYNOS_GPD(PD, BASE, NAME) \
76 static struct exynos_pm_domain PD = { \
77 .base = (void __iomem *)BASE, \
80 .power_off = exynos_pd_power_off, \
81 .power_on = exynos_pd_power_on, \
86 static __init
int exynos_pm_dt_parse_domains(void)
88 struct device_node
*np
;
90 for_each_compatible_node(np
, NULL
, "samsung,exynos4210-pd") {
91 struct exynos_pm_domain
*pd
;
93 pd
= kzalloc(sizeof(*pd
), GFP_KERNEL
);
95 pr_err("%s: failed to allocate memory for domain\n",
100 if (of_get_property(np
, "samsung,exynos4210-pd-off", NULL
))
103 pd
->base
= of_iomap(np
, 0);
104 pd
->pd
.power_off
= exynos_pd_power_off
;
105 pd
->pd
.power_on
= exynos_pd_power_on
;
107 pm_genpd_init(&pd
->pd
, NULL
, false);
112 static __init
int exynos_pm_dt_parse_domains(void)
116 #endif /* CONFIG_OF */
118 static __init
void exynos_pm_add_dev_to_genpd(struct platform_device
*pdev
,
119 struct exynos_pm_domain
*pd
)
122 if (pm_genpd_add_device(&pd
->pd
, &pdev
->dev
))
123 pr_info("%s: error in adding %s device to %s power"
124 "domain\n", __func__
, dev_name(&pdev
->dev
),
129 EXYNOS_GPD(exynos4_pd_mfc
, S5P_PMU_MFC_CONF
, "pd-mfc");
130 EXYNOS_GPD(exynos4_pd_g3d
, S5P_PMU_G3D_CONF
, "pd-g3d");
131 EXYNOS_GPD(exynos4_pd_lcd0
, S5P_PMU_LCD0_CONF
, "pd-lcd0");
132 EXYNOS_GPD(exynos4_pd_lcd1
, S5P_PMU_LCD1_CONF
, "pd-lcd1");
133 EXYNOS_GPD(exynos4_pd_tv
, S5P_PMU_TV_CONF
, "pd-tv");
134 EXYNOS_GPD(exynos4_pd_cam
, S5P_PMU_CAM_CONF
, "pd-cam");
135 EXYNOS_GPD(exynos4_pd_gps
, S5P_PMU_GPS_CONF
, "pd-gps");
137 static struct exynos_pm_domain
*exynos4_pm_domains
[] = {
147 static __init
int exynos4_pm_init_power_domain(void)
151 if (of_have_populated_dt())
152 return exynos_pm_dt_parse_domains();
154 for (idx
= 0; idx
< ARRAY_SIZE(exynos4_pm_domains
); idx
++)
155 pm_genpd_init(&exynos4_pm_domains
[idx
]->pd
, NULL
,
156 exynos4_pm_domains
[idx
]->is_off
);
158 #ifdef CONFIG_S5P_DEV_FIMD0
159 exynos_pm_add_dev_to_genpd(&s5p_device_fimd0
, &exynos4_pd_lcd0
);
161 #ifdef CONFIG_S5P_DEV_TV
162 exynos_pm_add_dev_to_genpd(&s5p_device_hdmi
, &exynos4_pd_tv
);
163 exynos_pm_add_dev_to_genpd(&s5p_device_mixer
, &exynos4_pd_tv
);
165 #ifdef CONFIG_S5P_DEV_MFC
166 exynos_pm_add_dev_to_genpd(&s5p_device_mfc
, &exynos4_pd_mfc
);
168 #ifdef CONFIG_S5P_DEV_FIMC0
169 exynos_pm_add_dev_to_genpd(&s5p_device_fimc0
, &exynos4_pd_cam
);
171 #ifdef CONFIG_S5P_DEV_FIMC1
172 exynos_pm_add_dev_to_genpd(&s5p_device_fimc1
, &exynos4_pd_cam
);
174 #ifdef CONFIG_S5P_DEV_FIMC2
175 exynos_pm_add_dev_to_genpd(&s5p_device_fimc2
, &exynos4_pd_cam
);
177 #ifdef CONFIG_S5P_DEV_FIMC3
178 exynos_pm_add_dev_to_genpd(&s5p_device_fimc3
, &exynos4_pd_cam
);
180 #ifdef CONFIG_S5P_DEV_CSIS0
181 exynos_pm_add_dev_to_genpd(&s5p_device_mipi_csis0
, &exynos4_pd_cam
);
183 #ifdef CONFIG_S5P_DEV_CSIS1
184 exynos_pm_add_dev_to_genpd(&s5p_device_mipi_csis1
, &exynos4_pd_cam
);
186 #ifdef CONFIG_S5P_DEV_G2D
187 exynos_pm_add_dev_to_genpd(&s5p_device_g2d
, &exynos4_pd_lcd0
);
189 #ifdef CONFIG_S5P_DEV_JPEG
190 exynos_pm_add_dev_to_genpd(&s5p_device_jpeg
, &exynos4_pd_cam
);
194 arch_initcall(exynos4_pm_init_power_domain
);
196 int __init
exynos_pm_late_initcall(void)
198 pm_genpd_poweroff_unused();