diff mbox

[v2,4/7] OMAP2+: PM: idle clkdms only if already in idle

Message ID 1308917193-16912-5-git-send-email-b-cousson@ti.com (mailing list archive)
State New, archived
Delegated to: Benoit Cousson
Headers show

Commit Message

Benoit Cousson June 24, 2011, 12:06 p.m. UTC 
From: Nayak, Rajendra <rnayak@ti.com>

The omap_set_pwrdm_state function forces clockdomains
to idle, without checking the existing idle state
programmed, instead based solely on the HW capability
of the clockdomain to support idle.
This is wrong and the clockdomains should be idled
post a state_switch *only* if idle transitions on the
clockdomain were already enabled.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
---
 arch/arm/mach-omap2/pm.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
diff mbox

Patch

diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index d48813f..840b0e1 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -108,6 +108,7 @@  int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
 	u32 cur_state;
 	int sleep_switch = -1;
 	int ret = 0;
+	int hwsup = 0;
 
 	if (pwrdm == NULL || IS_ERR(pwrdm))
 		return -EINVAL;
@@ -127,6 +128,7 @@  int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
 			(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) {
 			sleep_switch = LOWPOWERSTATE_SWITCH;
 		} else {
+			hwsup = clkdm_is_idle(pwrdm->pwrdm_clkdms[0]);
 			clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
 			pwrdm_wait_transition(pwrdm);
 			sleep_switch = FORCEWAKEUP_SWITCH;
@@ -142,7 +144,7 @@  int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
 
 	switch (sleep_switch) {
 	case FORCEWAKEUP_SWITCH:
-		if (pwrdm->pwrdm_clkdms[0]->flags & CLKDM_CAN_ENABLE_AUTO)
+		if (hwsup)
 			clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
 		else
 			clkdm_sleep(pwrdm->pwrdm_clkdms[0]);