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Date: Sun, 14 Aug 2011 16:07:08 +0200
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Linux PM mailing list <linux-pm@...ts.linux-foundation.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org
Subject: [Update x2][PATCH 9/9] ARM / shmobile: Make A3RV be a subdomain of A4LC on SH7372
From: Rafael J. Wysocki <rjw@...k.pl>
Subject: 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@...k.pl>
---
It also needs to build for CONFIG_PM unset.
Thanks,
Rafael
---
arch/arm/mach-shmobile/include/mach/sh7372.h | 3 +
arch/arm/mach-shmobile/pm-sh7372.c | 48 ++++-----------------------
arch/arm/mach-shmobile/setup-sh7372.c | 3 +
3 files changed, 14 insertions(+), 40 deletions(-)
Index: linux/arch/arm/mach-shmobile/pm-sh7372.c
===================================================================
--- linux.orig/arch/arm/mach-shmobile/pm-sh7372.c
+++ linux/arch/arm/mach-shmobile/pm-sh7372.c
@@ -91,35 +91,6 @@ static int pd_power_up(struct generic_pm
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
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
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,
};
Index: linux/arch/arm/mach-shmobile/setup-sh7372.c
===================================================================
--- linux.orig/arch/arm/mach-shmobile/setup-sh7372.c
+++ linux/arch/arm/mach-shmobile/setup-sh7372.c
@@ -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(
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));
Index: linux/arch/arm/mach-shmobile/include/mach/sh7372.h
===================================================================
--- linux.orig/arch/arm/mach-shmobile/include/mach/sh7372.h
+++ linux/arch/arm/mach-shmobile/include/mach/sh7372.h
@@ -494,9 +494,12 @@ extern struct sh7372_pm_domain sh7372_a3
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__ */
--
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