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/*
* r8a7740 power management support
*
* Copyright (C) 2012 Renesas Solutions Corp.
* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/console.h>
#include <linux/io.h>
#include <linux/suspend.h>
#include "common.h"
#include "pm-rmobile.h"
#define SYSC_BASE IOMEM(0xe6180000)
#if defined(CONFIG_PM) && !defined(CONFIG_ARCH_MULTIPLATFORM)
static int r8a7740_pd_a3sm_suspend(void)
{
/*
* The A3SM domain contains the CPU core and therefore it should
* only be turned off if the CPU is not in use.
*/
return -EBUSY;
}
static int r8a7740_pd_a3sp_suspend(void)
{
/*
* Serial consoles make use of SCIF hardware located in A3SP,
* keep such power domain on if "no_console_suspend" is set.
*/
return console_suspend_enabled ? 0 : -EBUSY;
}
static int r8a7740_pd_d4_suspend(void)
{
/*
* The D4 domain contains the Coresight-ETM hardware block and
* therefore it should only be turned off if the debug module is
* not in use.
*/
return -EBUSY;
}
static struct rmobile_pm_domain r8a7740_pm_domains[] = {
{
.genpd.name = "A4LC",
.base = SYSC_BASE,
.bit_shift = 1,
}, {
.genpd.name = "A4MP",
.base = SYSC_BASE,
.bit_shift = 2,
}, {
.genpd.name = "D4",
.base = SYSC_BASE,
.bit_shift = 3,
.gov = &pm_domain_always_on_gov,
.suspend = r8a7740_pd_d4_suspend,
}, {
.genpd.name = "A4R",
.base = SYSC_BASE,
.bit_shift = 5,
}, {
.genpd.name = "A3RV",
.base = SYSC_BASE,
.bit_shift = 6,
}, {
.genpd.name = "A4S",
.base = SYSC_BASE,
.bit_shift = 10,
.no_debug = true,
}, {
.genpd.name = "A3SP",
.base = SYSC_BASE,
.bit_shift = 11,
.gov = &pm_domain_always_on_gov,
.no_debug = true,
.suspend = r8a7740_pd_a3sp_suspend,
}, {
.genpd.name = "A3SM",
.base = SYSC_BASE,
.bit_shift = 12,
.gov = &pm_domain_always_on_gov,
.suspend = r8a7740_pd_a3sm_suspend,
}, {
.genpd.name = "A3SG",
.base = SYSC_BASE,
.bit_shift = 13,
}, {
.genpd.name = "A4SU",
.base = SYSC_BASE,
.bit_shift = 20,
},
};
void __init r8a7740_init_pm_domains(void)
{
rmobile_init_domains(r8a7740_pm_domains, ARRAY_SIZE(r8a7740_pm_domains));
pm_genpd_add_subdomain_names("A4R", "A3RV");
pm_genpd_add_subdomain_names("A4S", "A3SP");
pm_genpd_add_subdomain_names("A4S", "A3SM");
pm_genpd_add_subdomain_names("A4S", "A3SG");
}
#endif /* CONFIG_PM && !CONFIG_ARCH_MULTIPLATFORM */
#ifdef CONFIG_SUSPEND
static int r8a7740_enter_suspend(suspend_state_t suspend_state)
{
cpu_do_idle();
return 0;
}
static void r8a7740_suspend_init(void)
{
shmobile_suspend_ops.enter = r8a7740_enter_suspend;
}
#else
static void r8a7740_suspend_init(void) {}
#endif
void __init r8a7740_pm_init(void)
{
r8a7740_suspend_init();
}
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