Commit 8f45b112 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Rafael J. Wysocki

ARM: shmobile: soc-core: add R-mobile PM domain common APIs

This patch adds Renesas R-mobile series common PM domain APIs.
R-mobile CPU can use/switch this API
Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent 64e9de2f
......@@ -39,6 +39,7 @@ obj-$(CONFIG_ARCH_R8A7740) += entry-intc.o
# PM objects
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_ARCH_SHMOBILE) += pm-rmobile.o
obj-$(CONFIG_ARCH_SH7372) += pm-sh7372.o sleep-sh7372.o
obj-$(CONFIG_ARCH_R8A7779) += pm-r8a7779.o
......
/*
* Copyright (C) 2012 Renesas Solutions Corp.
*
* Kuninori Morimoto <morimoto.kuninori@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.
*/
#ifndef PM_RMOBILE_H
#define PM_RMOBILE_H
#include <linux/pm_domain.h>
struct platform_device;
struct rmobile_pm_domain {
struct generic_pm_domain genpd;
struct dev_power_governor *gov;
int (*suspend)(void);
void (*resume)(void);
unsigned int bit_shift;
bool no_debug;
};
static inline
struct rmobile_pm_domain *to_rmobile_pd(struct generic_pm_domain *d)
{
return container_of(d, struct rmobile_pm_domain, genpd);
}
#ifdef CONFIG_PM
extern void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd);
extern void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd,
struct platform_device *pdev);
extern void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd,
struct rmobile_pm_domain *rmobile_sd);
#else
#define rmobile_init_pm_domain(pd) do { } while (0)
#define rmobile_add_device_to_domain(pd, pdev) do { } while (0)
#define rmobile_pm_add_subdomain(pd, sd) do { } while (0)
#endif /* CONFIG_PM */
#endif /* PM_RMOBILE_H */
/*
* rmobile power management support
*
* Copyright (C) 2012 Renesas Solutions Corp.
* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* based on pm-sh7372.c
* Copyright (C) 2011 Magnus Damm
*
* 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/delay.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_clock.h>
#include <asm/io.h>
#include <mach/pm-rmobile.h>
/* SYSC */
#define SPDCR 0xe6180008
#define SWUCR 0xe6180014
#define PSTR 0xe6180080
#define PSTR_RETRIES 100
#define PSTR_DELAY_US 10
#ifdef CONFIG_PM
static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
{
struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
unsigned int mask = 1 << rmobile_pd->bit_shift;
if (rmobile_pd->suspend) {
int ret = rmobile_pd->suspend();
if (ret)
return ret;
}
if (__raw_readl(PSTR) & mask) {
unsigned int retry_count;
__raw_writel(mask, SPDCR);
for (retry_count = PSTR_RETRIES; retry_count; retry_count--) {
if (!(__raw_readl(SPDCR) & mask))
break;
cpu_relax();
}
}
if (!rmobile_pd->no_debug)
pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n",
genpd->name, mask, __raw_readl(PSTR));
return 0;
}
static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd,
bool do_resume)
{
unsigned int mask = 1 << rmobile_pd->bit_shift;
unsigned int retry_count;
int ret = 0;
if (__raw_readl(PSTR) & mask)
goto out;
__raw_writel(mask, SWUCR);
for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) {
if (!(__raw_readl(SWUCR) & mask))
break;
if (retry_count > PSTR_RETRIES)
udelay(PSTR_DELAY_US);
else
cpu_relax();
}
if (!retry_count)
ret = -EIO;
if (!rmobile_pd->no_debug)
pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
rmobile_pd->genpd.name, mask, __raw_readl(PSTR));
out:
if (ret == 0 && rmobile_pd->resume && do_resume)
rmobile_pd->resume();
return ret;
}
static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
{
return __rmobile_pd_power_up(to_rmobile_pd(genpd), true);
}
static bool rmobile_pd_active_wakeup(struct device *dev)
{
bool (*active_wakeup)(struct device *dev);
active_wakeup = dev_gpd_data(dev)->ops.active_wakeup;
return active_wakeup ? active_wakeup(dev) : true;
}
static int rmobile_pd_stop_dev(struct device *dev)
{
int (*stop)(struct device *dev);
stop = dev_gpd_data(dev)->ops.stop;
if (stop) {
int ret = stop(dev);
if (ret)
return ret;
}
return pm_clk_suspend(dev);
}
static int rmobile_pd_start_dev(struct device *dev)
{
int (*start)(struct device *dev);
int ret;
ret = pm_clk_resume(dev);
if (ret)
return ret;
start = dev_gpd_data(dev)->ops.start;
if (start)
ret = start(dev);
return ret;
}
void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
{
struct generic_pm_domain *genpd = &rmobile_pd->genpd;
struct dev_power_governor *gov = rmobile_pd->gov;
pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
genpd->dev_ops.stop = rmobile_pd_stop_dev;
genpd->dev_ops.start = rmobile_pd_start_dev;
genpd->dev_ops.active_wakeup = rmobile_pd_active_wakeup;
genpd->dev_irq_safe = true;
genpd->power_off = rmobile_pd_power_down;
genpd->power_on = rmobile_pd_power_up;
__rmobile_pd_power_up(rmobile_pd, false);
}
void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
pm_genpd_add_device(&rmobile_pd->genpd, dev);
if (pm_clk_no_clocks(dev))
pm_clk_add(dev, NULL);
}
void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd,
struct rmobile_pm_domain *rmobile_sd)
{
pm_genpd_add_subdomain(&rmobile_pd->genpd, &rmobile_sd->genpd);
}
#endif /* CONFIG_PM */
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