perf: add OMAP support for the new power events
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>
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index a11be81..49c6513 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -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 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 @@
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 @@
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;
}