[PATCH] perf: add OMAP support for the new power events

[jean.pihet@newoldbits.com]

From: Jean Pihet <j-pihet@ti.com>

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;
- cpufreq (DVFS),
- SoC clocks changes (enable, disable, set_rate),
- change of power domains next power states.

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

Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/clock.c       |    8 +++++++-
 arch/arm/mach-omap2/pm34xx.c      |    7 +++++++
 arch/arm/mach-omap2/powerdomain.c |    8 +++++++-
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 2a2f152..72af75d 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -22,7 +22,9 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/bitops.h>
+#include <trace/events/power.h>
 
+#include <asm/cpu.h>
 #include <plat/clock.h>
 #include "clockdomain.h"
 #include <plat/cpu.h>
@@ -261,6 +263,7 @@ void omap2_clk_disable(struct clk *clk)
 
 	pr_debug("clock: %s: disabling in hardware\n", clk->name);
 
+	trace_clock_disable(clk->name, 0, smp_processor_id());
 	clk->ops->disable(clk);
 
 	if (clk->clkdm)
@@ -312,6 +315,7 @@ int omap2_clk_enable(struct clk *clk)
 		}
 	}
 
+	trace_clock_enable(clk->name, 1, smp_processor_id());
 	ret = clk->ops->enable(clk);
 	if (ret) {
 		WARN(1, "clock: %s: could not enable: %d\n", clk->name, ret);
@@ -349,8 +353,10 @@ int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
 	pr_debug("clock: set_rate for clock %s to rate %ld\n", clk->name, rate);
 
 	/* dpll_ck, core_ck, virt_prcm_set; plus all clksel clocks */
-	if (clk->set_rate)
+	if (clk->set_rate) {
+		trace_clock_set_rate(clk->name, rate, smp_processor_id());
 		ret = clk->set_rate(clk, rate);
+	}
 
 	return ret;
 }
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 8cbbead..7c5e0ee 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -29,6 +29,7 @@
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/console.h>
+#include <trace/events/power.h>
 
 #include <plat/sram.h>
 #include "clockdomain.h"
@@ -518,8 +519,14 @@ static void omap3_pm_idle(void)
 	if (omap_irq_pending() || need_resched())
 		goto out;
 
+	trace_power_start(POWER_CSTATE, 1, smp_processor_id());
+	trace_cpu_idle(1, smp_processor_id());
+
 	omap_sram_idle();
 
+	trace_power_end(smp_processor_id());
+	trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
+
 out:
 	local_fiq_enable();
 	local_irq_enable();
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index eaed0df..e1feb50 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"
@@ -406,8 +409,11 @@ 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_power_domain_target(pwrdm->name, pwrst,
+					  smp_processor_id());
 		ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst);
+	}
 
 	return ret;
 }
-- 
1.7.2.3