From 0822f5ee6e1e68787fe7232b63b79ba4d2d9c23a Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Mon, 8 Aug 2011 23:44:19 +0200
Subject: [PATCH] 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>
---
 arch/arm/mach-shmobile/pm-sh7372.c    | 42 ++-------------------------
 arch/arm/mach-shmobile/setup-sh7372.c |  3 ++
 2 files changed, 5 insertions(+), 40 deletions(-)

diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c
index 933fb411be0f..168ed5890ce8 100644
--- a/arch/arm/mach-shmobile/pm-sh7372.c
+++ b/arch/arm/mach-shmobile/pm-sh7372.c
@@ -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);
 }
 
diff --git a/arch/arm/mach-shmobile/setup-sh7372.c b/arch/arm/mach-shmobile/setup-sh7372.c
index 79f0413d8725..a8d6abb70fc3 100644
--- a/arch/arm/mach-shmobile/setup-sh7372.c
+++ b/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(void)
 	sh7372_init_pm_domain(&sh7372_a3ri);
 	sh7372_init_pm_domain(&sh7372_a3sg);
 
+	pm_genpd_add_subdomain(&sh7372_a4lc.genpd, &sh7372_a3sg.genpd);
+
 	platform_add_devices(sh7372_early_devices,
 			    ARRAY_SIZE(sh7372_early_devices));
 
-- 
2.39.5