2 * r8a7779 Power management support
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Copyright (C) 2011 Magnus Damm
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/suspend.h>
14 #include <linux/err.h>
15 #include <linux/pm_clock.h>
16 #include <linux/pm_domain.h>
17 #include <linux/platform_device.h>
18 #include <linux/delay.h>
19 #include <linux/irq.h>
20 #include <linux/interrupt.h>
21 #include <linux/console.h>
33 struct r8a7779_pm_domain {
34 struct generic_pm_domain genpd;
35 struct rcar_sysc_ch ch;
39 const struct rcar_sysc_ch *to_r8a7779_ch(struct generic_pm_domain *d)
41 return &container_of(d, struct r8a7779_pm_domain, genpd)->ch;
44 #if defined(CONFIG_PM) || defined(CONFIG_SMP)
46 static void __init r8a7779_sysc_init(void)
48 void __iomem *base = rcar_sysc_init(0xffd85000);
50 /* enable all interrupt sources, but do not use interrupt handler */
51 iowrite32(0x0131000e, base + SYSCIER);
52 iowrite32(0, base + SYSCIMR);
55 #else /* CONFIG_PM || CONFIG_SMP */
57 static inline void r8a7779_sysc_init(void) {}
59 #endif /* CONFIG_PM || CONFIG_SMP */
63 static int pd_power_down(struct generic_pm_domain *genpd)
65 return rcar_sysc_power_down(to_r8a7779_ch(genpd));
68 static int pd_power_up(struct generic_pm_domain *genpd)
70 return rcar_sysc_power_up(to_r8a7779_ch(genpd));
73 static bool pd_is_off(struct generic_pm_domain *genpd)
75 return rcar_sysc_power_is_off(to_r8a7779_ch(genpd));
78 static bool pd_active_wakeup(struct device *dev)
83 static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
85 struct generic_pm_domain *genpd = &r8a7779_pd->genpd;
87 pm_genpd_init(genpd, NULL, false);
88 genpd->dev_ops.active_wakeup = pd_active_wakeup;
89 genpd->power_off = pd_power_down;
90 genpd->power_on = pd_power_up;
92 if (pd_is_off(&r8a7779_pd->genpd))
93 pd_power_up(&r8a7779_pd->genpd);
96 static struct r8a7779_pm_domain r8a7779_pm_domains[] = {
100 .chan_offs = 0x80, /* PWRSR1 .. PWRER1 */
101 .isr_bit = 16, /* SH4A */
107 .chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */
108 .isr_bit = 20, /* SGX */
112 .genpd.name = "VDP1",
114 .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
115 .isr_bit = 21, /* VDP */
119 .genpd.name = "IMPX3",
121 .chan_offs = 0x140, /* PWRSR4 .. PWRER4 */
122 .isr_bit = 24, /* IMP */
127 void __init r8a7779_init_pm_domains(void)
131 for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++)
132 r8a7779_init_pm_domain(&r8a7779_pm_domains[j]);
135 #endif /* CONFIG_PM */
137 void __init r8a7779_pm_init(void)