diff options
| author | Santosh Shilimkar <[email protected]> | 2011-08-19 22:59:39 +0000 |
|---|---|---|
| committer | Paul Walmsley <[email protected]> | 2011-08-19 22:59:39 +0000 |
| commit | b1cbdb00da2ac00eb67fe277e563ff1f5093b4ba (patch) | |
| tree | 102865903e981befe15585b0b63ad14b482a160d | |
| parent | OMAP: powerdomains: Make all powerdomain target states as ON at init (diff) | |
| download | kernel-b1cbdb00da2ac00eb67fe277e563ff1f5093b4ba.tar.gz kernel-b1cbdb00da2ac00eb67fe277e563ff1f5093b4ba.zip | |
OMAP: clockdomain: Wait for powerdomain to be ON when using clockdomain force wakeup
While using clockdomain force wakeup method, not waiting for powerdomain
to be effectively ON may end up locking the clockdomain FSM until a
next wakeup event occurs.
One such issue was seen on OMAP4430, where L4_PER was periodically
getting stuck in in-transition state when transitioning from from OSWR to ON.
This issue was reported and investigated by Patrick Titiano <[email protected]>
Signed-off-by: Santosh Shilimkar <[email protected]>
Signed-off-by: Rajendra Nayak <[email protected]>
Reported-by: Patrick Titiano <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: Benoit Cousson <[email protected]>
Cc: Paul Walmsley <[email protected]>
[[email protected]: updated to apply; added transition wait on clkdm_deny_idle();
remove two superfluous pwrdm_wait_transition() calls]
Signed-off-by: Paul Walmsley <[email protected]>
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/pm.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c index ab7db083f97f..8f0890685d7b 100644 --- a/arch/arm/mach-omap2/clockdomain.c +++ b/arch/arm/mach-omap2/clockdomain.c @@ -747,6 +747,7 @@ int clkdm_wakeup(struct clockdomain *clkdm) spin_lock_irqsave(&clkdm->lock, flags); clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED; ret = arch_clkdm->clkdm_wakeup(clkdm); + ret |= pwrdm_state_switch(clkdm->pwrdm.ptr); spin_unlock_irqrestore(&clkdm->lock, flags); return ret; } @@ -818,6 +819,7 @@ void clkdm_deny_idle(struct clockdomain *clkdm) spin_lock_irqsave(&clkdm->lock, flags); clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED; arch_clkdm->clkdm_deny_idle(clkdm); + pwrdm_state_switch(clkdm->pwrdm.ptr); spin_unlock_irqrestore(&clkdm->lock, flags); } diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index 3feb35911a32..472bf22d5e84 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -130,7 +130,6 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) } else { hwsup = clkdm_in_hwsup(pwrdm->pwrdm_clkdms[0]); clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); - pwrdm_wait_transition(pwrdm); sleep_switch = FORCEWAKEUP_SWITCH; } } @@ -156,7 +155,6 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) return ret; } - pwrdm_wait_transition(pwrdm); pwrdm_state_switch(pwrdm); err: return ret; |