brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 23:36:23 +09:00
Code Issues Projects Releases Wiki Activity

OMAP3: PM: CPUidle: check activity for C2, C3, correct accounting

Browse Source 
Use the activity check for states C2 and C3 as well.  This is
primarily to prevent deeper states during UART activity.

Also, if a different state is chosen than the target state, update the
'last_state' accordingly so that CPUidle state accounting is coorect.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Kevin Hilman 2008-10-28 17:32:11 -07:00
parent c98e223006
commit 0f724ed92b
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/arm/mach-omap2/cpuidle34xx.c
View File

@ -28,6 +28,7 @@
#include <plat/powerdomain.h>
#include <plat/irqs.h>
#include <plat/control.h>
#include <plat/serial.h>
#include "pm.h"
@ -124,11 +125,15 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
static int omap3_enter_idle_bm(struct cpuidle_device *dev,
struct cpuidle_state *state)
{
struct cpuidle_state *new_state = state;
if ((state->flags & CPUIDLE_FLAG_CHECK_BM) && omap3_idle_bm_check()) {
if (dev->safe_state)
return dev->safe_state->enter(dev, dev->safe_state);
BUG_ON(!dev->safe_state);
new_state = dev->safe_state;
}
return omap3_enter_idle(dev, state);
dev->last_state = new_state;
return omap3_enter_idle(dev, new_state);
}
DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
@ -163,7 +168,8 @@ void omap_init_power_states(void)
omap3_power_states[OMAP3_STATE_C2].threshold = 300;
omap3_power_states[OMAP3_STATE_C2].mpu_state = PWRDM_POWER_RET;
omap3_power_states[OMAP3_STATE_C2].core_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C2].flags = CPUIDLE_FLAG_TIME_VALID;
omap3_power_states[OMAP3_STATE_C2].flags = CPUIDLE_FLAG_TIME_VALID |
CPUIDLE_FLAG_CHECK_BM;
/* C3 . MPU OFF + Core active */
omap3_power_states[OMAP3_STATE_C3].valid = 1;
@ -173,7 +179,8 @@ void omap_init_power_states(void)
omap3_power_states[OMAP3_STATE_C3].threshold = 4000;
omap3_power_states[OMAP3_STATE_C3].mpu_state = PWRDM_POWER_OFF;
omap3_power_states[OMAP3_STATE_C3].core_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C3].flags = CPUIDLE_FLAG_TIME_VALID;
omap3_power_states[OMAP3_STATE_C3].flags = CPUIDLE_FLAG_TIME_VALID |
CPUIDLE_FLAG_CHECK_BM;
/* C4 . MPU CSWR + Core CSWR*/
omap3_power_states[OMAP3_STATE_C4].valid = 1;
@ -198,7 +205,7 @@ void omap_init_power_states(void)
CPUIDLE_FLAG_CHECK_BM;
/* C6 . MPU OFF + Core OFF */
omap3_power_states[OMAP3_STATE_C6].valid = 0;
omap3_power_states[OMAP3_STATE_C6].valid = 1;
omap3_power_states[OMAP3_STATE_C6].type = OMAP3_STATE_C6;
omap3_power_states[OMAP3_STATE_C6].sleep_latency = 10000;
omap3_power_states[OMAP3_STATE_C6].wakeup_latency = 30000;