Jean Pihet <[email protected]> writes: > 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),
Minor: AFAICT, this patch doesn't instrument CPUfreq. > - 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 <[email protected]> With Paul's ack on the powerdomain changes, I'll queue this for 2.6.39 after making the above change in the changelog. Kevin > --- > arch/arm/mach-omap2/clock.c | 11 +++++++++-- > arch/arm/mach-omap2/pm34xx.c | 7 +++++++ > arch/arm/mach-omap2/powerdomain.c | 26 +++++++++++++++++++++++--- > 3 files changed, 39 insertions(+), 5 deletions(-) > > diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c > index 46d03cc..180299e 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; > } > diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c > index bd610bc..d46b9ff 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" > @@ -514,8 +515,14 @@ 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..1495eed 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 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; > } -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
