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>

1 files changed, 9 insertions, 2 deletions

diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 46d03ccc280..180299e4a83 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>
@@ -261,8 +263,10 @@ void omap2_clk_disable(struct clk *clk)
 
 	pr_debug("clock: %s: disabling in hardware\n", clk->name);
 
-	if (clk->ops && clk->ops->disable)
+	if (clk->ops && clk->ops->disable) {
+		trace_clock_disable(clk->name, 0, smp_processor_id());
 		clk->ops->disable(clk);
+	}
 
 	if (clk->clkdm)
 		clkdm_clk_disable(clk->clkdm, clk);
@@ -314,6 +318,7 @@ int omap2_clk_enable(struct clk *clk)
 	}
 
 	if (clk->ops && clk->ops->enable) {
+		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",
@@ -353,8 +358,10 @@ 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;
 }