diff options
| author | Rajendra Nayak <rnayak@ti.com> | 2010-12-22 08:37:27 +0300 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2010-12-22 08:37:27 +0300 |
| commit | 71a488dbcc4acbc9b845491a368b30ecd7484089 (patch) | |
| tree | 2361a5f47e82226dd8e88edcb11f9709e8217af6 /arch/arm/mach-omap2/pm.c | |
| parent | 6081dc348f122cdb76093b2fc6cf5742c968cb69 (diff) | |
| download | linux-71a488dbcc4acbc9b845491a368b30ecd7484089.tar.xz | |
OMAP4: PM: Use the low-power state change feature on OMAP4
For pwrdm's which support LOWPOWERSTATECHANGE, do not try waking
up the domain to put it back to deeper sleep state.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/pm.c')
| -rw-r--r-- | arch/arm/mach-omap2/pm.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index 227a211921c3..a2b826cdfbf6 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -89,6 +89,10 @@ static void omap2_init_processor_devices(void) } } +/* Types of sleep_switch used in omap_set_pwrdm_state */ +#define FORCEWAKEUP_SWITCH 0 +#define LOWPOWERSTATE_SWITCH 1 + /* * This sets pwrdm state (other than mpu & core. Currently only ON & * RET are supported. Function is assuming that clkdm doesn't have @@ -114,9 +118,14 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) return ret; if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) { - omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); - sleep_switch = 1; - pwrdm_wait_transition(pwrdm); + if ((pwrdm_read_pwrst(pwrdm) > state) && + (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) { + sleep_switch = LOWPOWERSTATE_SWITCH; + } else { + omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]); + pwrdm_wait_transition(pwrdm); + sleep_switch = FORCEWAKEUP_SWITCH; + } } ret = pwrdm_set_next_pwrst(pwrdm, state); @@ -126,12 +135,19 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) goto err; } - if (sleep_switch) { + switch (sleep_switch) { + case FORCEWAKEUP_SWITCH: omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]); - pwrdm_wait_transition(pwrdm); - pwrdm_state_switch(pwrdm); + break; + case LOWPOWERSTATE_SWITCH: + pwrdm_set_lowpwrstchange(pwrdm); + break; + default: + return ret; } + pwrdm_wait_transition(pwrdm); + pwrdm_state_switch(pwrdm); err: return ret; } |