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ARM / shmobile: Make A3RV be a subdomain of A4LC on SH7372 

Instead of coding the undocumented dependencies between power domains
A3RV and A4LC on SH7372 directly into the low-level power up/down
routines, make A3RV be a subdomain of A4LC, which will cause the
same dependecies to hold.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
This commit is contained in:
Rafael J. Wysocki 2011-08-14 13:35:39 +02:00
parent bc0403ff16
commit 111058c3ff
3 changed files with 14 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm/mach-shmobile/include/mach/sh7372.h
View File

@ -494,9 +494,12 @@ extern struct sh7372_pm_domain sh7372_a3sg;
extern void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd);
extern void sh7372_add_device_to_domain(struct sh7372_pm_domain *sh7372_pd,
struct platform_device *pdev);
extern void sh7372_pm_add_subdomain(struct sh7372_pm_domain *sh7372_pd,
struct sh7372_pm_domain *sh7372_sd);
#else
#define sh7372_init_pm_domain(pd) do { } while(0)
#define sh7372_add_device_to_domain(pd, pdev) do { } while(0)
#define sh7372_pm_add_subdomain(pd, sd) do { } while(0)
#endif /* CONFIG_PM */
#endif /* __ASM_SH7372_H__ */

48
arch/arm/mach-shmobile/pm-sh7372.c
View File

@ -91,35 +91,6 @@ static int pd_power_up(struct generic_pm_domain *genpd)
return ret;
}
static int pd_power_up_a3rv(struct generic_pm_domain *genpd)
{
int ret = pd_power_up(genpd);
/* force A4LC on after A3RV has been requested on */
pm_genpd_poweron(&sh7372_a4lc.genpd);
return ret;
}
static int pd_power_down_a3rv(struct generic_pm_domain *genpd)
{
int ret = pd_power_down(genpd);
/* try to power down A4LC after A3RV is requested off */
genpd_queue_power_off_work(&sh7372_a4lc.genpd);
return ret;
}
static int pd_power_down_a4lc(struct generic_pm_domain *genpd)
{
/* only power down A4LC if A3RV is off */
if (!(__raw_readl(PSTR) & (1 << sh7372_a3rv.bit_shift)))
return pd_power_down(genpd);
return -EBUSY;
}
static bool pd_active_wakeup(struct device *dev)
{
return true;
@ -133,17 +104,8 @@ void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd)
genpd->stop_device = pm_clk_suspend;
genpd->start_device = pm_clk_resume;
genpd->active_wakeup = pd_active_wakeup;
if (sh7372_pd == &sh7372_a4lc) {
genpd->power_off = pd_power_down_a4lc;
genpd->power_on = pd_power_up;
} else if (sh7372_pd == &sh7372_a3rv) {
genpd->power_off = pd_power_down_a3rv;
genpd->power_on = pd_power_up_a3rv;
} else {
genpd->power_off = pd_power_down;
genpd->power_on = pd_power_up;
}
genpd->power_off = pd_power_down;
genpd->power_on = pd_power_up;
genpd->power_on(&sh7372_pd->genpd);
}
@ -159,6 +121,12 @@ void sh7372_add_device_to_domain(struct sh7372_pm_domain *sh7372_pd,
pm_genpd_add_device(&sh7372_pd->genpd, dev);
}
void sh7372_pm_add_subdomain(struct sh7372_pm_domain *sh7372_pd,
struct sh7372_pm_domain *sh7372_sd)
{
pm_genpd_add_subdomain(&sh7372_pd->genpd, &sh7372_sd->genpd);
}
struct sh7372_pm_domain sh7372_a4lc = {
.bit_shift = 1,
};

3
arch/arm/mach-shmobile/setup-sh7372.c
View File

@ -30,6 +30,7 @@
#include <linux/sh_dma.h>
#include <linux/sh_intc.h>
#include <linux/sh_timer.h>
#include <linux/pm_domain.h>
#include <mach/hardware.h>
#include <mach/sh7372.h>
#include <asm/mach-types.h>
@ -848,6 +849,8 @@ void __init sh7372_add_standard_devices(void)
sh7372_init_pm_domain(&sh7372_a3ri);
sh7372_init_pm_domain(&sh7372_a3sg);
sh7372_pm_add_subdomain(&sh7372_a4lc, &sh7372_a3rv);
platform_add_devices(sh7372_early_devices,
ARRAY_SIZE(sh7372_early_devices));