mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
ab496b9d25
There are no active users of these callbacks, thus there are no benefit of trying to invoke them. Cc: Simon Horman <horms@verge.net.au> Cc: Magnus Damm <magnus.damm@gmail.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
155 lines
3.7 KiB
C
155 lines
3.7 KiB
C
/*
|
|
* 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 IOMEM(0xe6180008)
|
|
#define SWUCR IOMEM(0xe6180014)
|
|
#define PSTR IOMEM(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)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static 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 = pm_clk_suspend;
|
|
genpd->dev_ops.start = pm_clk_resume;
|
|
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_init_domains(struct rmobile_pm_domain domains[], int num)
|
|
{
|
|
int j;
|
|
|
|
for (j = 0; j < num; j++)
|
|
rmobile_init_pm_domain(&domains[j]);
|
|
}
|
|
|
|
void rmobile_add_device_to_domain_td(const char *domain_name,
|
|
struct platform_device *pdev,
|
|
struct gpd_timing_data *td)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
|
|
__pm_genpd_name_add_device(domain_name, dev, td);
|
|
if (pm_clk_no_clocks(dev))
|
|
pm_clk_add(dev, NULL);
|
|
}
|
|
|
|
void rmobile_add_devices_to_domains(struct pm_domain_device data[],
|
|
int size)
|
|
{
|
|
struct gpd_timing_data latencies = {
|
|
.stop_latency_ns = DEFAULT_DEV_LATENCY_NS,
|
|
.start_latency_ns = DEFAULT_DEV_LATENCY_NS,
|
|
.save_state_latency_ns = DEFAULT_DEV_LATENCY_NS,
|
|
.restore_state_latency_ns = DEFAULT_DEV_LATENCY_NS,
|
|
};
|
|
int j;
|
|
|
|
for (j = 0; j < size; j++)
|
|
rmobile_add_device_to_domain_td(data[j].domain_name,
|
|
data[j].pdev, &latencies);
|
|
}
|
|
#endif /* CONFIG_PM */
|