Merge tag 'locks-v3.16-2' of git://git.samba.org/jlayton/linux
[linux/fpc-iii.git] / arch / arm / mach-shmobile / pm-r8a7779.c
blobd6fe189b2df6e4176d343b33630085bff7d071c7
1 /*
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
9 * for more details.
12 #include <linux/pm.h>
13 #include <linux/suspend.h>
14 #include <linux/err.h>
15 #include <linux/pm_clock.h>
16 #include <linux/platform_device.h>
17 #include <linux/delay.h>
18 #include <linux/irq.h>
19 #include <linux/interrupt.h>
20 #include <linux/console.h>
21 #include <asm/io.h>
22 #include <mach/common.h>
23 #include <mach/pm-rcar.h>
24 #include <mach/r8a7779.h>
26 /* SYSC */
27 #define SYSCIER 0x0c
28 #define SYSCIMR 0x10
30 #if defined(CONFIG_PM) || defined(CONFIG_SMP)
32 static void __init r8a7779_sysc_init(void)
34 void __iomem *base = rcar_sysc_init(0xffd85000);
36 /* enable all interrupt sources, but do not use interrupt handler */
37 iowrite32(0x0131000e, base + SYSCIER);
38 iowrite32(0, base + SYSCIMR);
41 #else /* CONFIG_PM || CONFIG_SMP */
43 static inline void r8a7779_sysc_init(void) {}
45 #endif /* CONFIG_PM || CONFIG_SMP */
47 #ifdef CONFIG_PM
49 static int pd_power_down(struct generic_pm_domain *genpd)
51 return rcar_sysc_power_down(to_r8a7779_ch(genpd));
54 static int pd_power_up(struct generic_pm_domain *genpd)
56 return rcar_sysc_power_up(to_r8a7779_ch(genpd));
59 static bool pd_is_off(struct generic_pm_domain *genpd)
61 return rcar_sysc_power_is_off(to_r8a7779_ch(genpd));
64 static bool pd_active_wakeup(struct device *dev)
66 return true;
69 static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
71 struct generic_pm_domain *genpd = &r8a7779_pd->genpd;
73 pm_genpd_init(genpd, NULL, false);
74 genpd->dev_ops.stop = pm_clk_suspend;
75 genpd->dev_ops.start = pm_clk_resume;
76 genpd->dev_ops.active_wakeup = pd_active_wakeup;
77 genpd->dev_irq_safe = true;
78 genpd->power_off = pd_power_down;
79 genpd->power_on = pd_power_up;
81 if (pd_is_off(&r8a7779_pd->genpd))
82 pd_power_up(&r8a7779_pd->genpd);
85 static struct r8a7779_pm_domain r8a7779_pm_domains[] = {
87 .genpd.name = "SH4A",
88 .ch = {
89 .chan_offs = 0x80, /* PWRSR1 .. PWRER1 */
90 .isr_bit = 16, /* SH4A */
94 .genpd.name = "SGX",
95 .ch = {
96 .chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */
97 .isr_bit = 20, /* SGX */
101 .genpd.name = "VDP1",
102 .ch = {
103 .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
104 .isr_bit = 21, /* VDP */
108 .genpd.name = "IMPX3",
109 .ch = {
110 .chan_offs = 0x140, /* PWRSR4 .. PWRER4 */
111 .isr_bit = 24, /* IMP */
116 void __init r8a7779_init_pm_domains(void)
118 int j;
120 for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++)
121 r8a7779_init_pm_domain(&r8a7779_pm_domains[j]);
124 #endif /* CONFIG_PM */
126 void __init r8a7779_pm_init(void)
128 static int once;
130 if (!once++)
131 r8a7779_sysc_init();