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perf: add OMAP support for the new power events

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The patch adds the new power management trace points for
the OMAP architecture.

The trace points are for:
- default idle handler. Since the cpuidle framework is
  instrumented in the generic way there is no need to
  add trace points in the OMAP specific cpuidle handler;
- SoC clocks changes (enable, disable, set_rate),
- power domain states: the desired target state and -if different-
  the actually hit state.

Because of the generic nature of the changes, OMAP3 and OMAP4 are supported.

Tested on OMAP3 with suspend/resume, cpuidle, basic DVFS.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Jean Pihet
2011-03-03 11:25:43 +01:00
committed by Kevin Hilman
parent a271e58cfb
commit 5e7c58dc8d
3 changed files with 39 additions and 5 deletions
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26
arch/arm/mach-omap2/powerdomain.c
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@@ -19,12 +19,15 @@
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <trace/events/power.h>
#include "cm2xxx_3xxx.h"
#include "prcm44xx.h"
#include "cm44xx.h"
#include "prm2xxx_3xxx.h"
#include "prm44xx.h"
#include <asm/cpu.h>
#include <plat/cpu.h>
#include "powerdomain.h"
#include "clockdomain.h"
@@ -32,6 +35,8 @@
#include "pm.h"
#define PWRDM_TRACE_STATES_FLAG (1<<31)
enum {
PWRDM_STATE_NOW = 0,
PWRDM_STATE_PREV,
@@ -130,8 +135,7 @@ static void _update_logic_membank_counters(struct powerdomain *pwrdm)
static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
{
int prev;
int state;
int prev, state, trace_state = 0;
if (pwrdm == NULL)
return -EINVAL;
@@ -148,6 +152,17 @@ static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
pwrdm->state_counter[prev]++;
if (prev == PWRDM_POWER_RET)
_update_logic_membank_counters(pwrdm);
/*
* If the power domain did not hit the desired state,
* generate a trace event with both the desired and hit states
*/
if (state != prev) {
trace_state = (PWRDM_TRACE_STATES_FLAG |
((state & OMAP_POWERSTATE_MASK) << 8) |
((prev & OMAP_POWERSTATE_MASK) << 0));
trace_power_domain_target(pwrdm->name, trace_state,
smp_processor_id());
}
break;
default:
return -EINVAL;
@@ -406,8 +421,13 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
pr_debug("powerdomain: setting next powerstate for %s to %0x\n",
pwrdm->name, pwrst);
if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst)
if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) {
/* Trace the pwrdm desired target state */
trace_power_domain_target(pwrdm->name, pwrst,
smp_processor_id());
/* Program the pwrdm desired target state */
ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst);
}
return ret;
}