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Commit 35e30b35 authored by Raghavendra Kakarla's avatar Raghavendra Kakarla Committed by Gerrit - the friendly Code Review server
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drivers: cpuidle: lpm-levels: Update CPU prediction timer 



Use per cpu timer to wake up cpu when LPM prediction fails.

Change-Id: I42e56a54decb1b98651a85f0087fd37542b68425
Signed-off-by: default avatarRaghavendra Kakarla <rkakarla@codeaurora.org>
parent 64766974

drivers/cpuidle/lpm-levels.c

+16 −5
Original line number Diff line number Diff line
@@ -116,7 +116,7 @@ static DEFINE_PER_CPU(struct lpm_history, hist); 
static DEFINE_PER_CPU(struct lpm_cpu*, cpu_lpm);

static bool suspend_in_progress;

static struct hrtimer lpm_hrtimer;

static struct hrtimer histtimer;

static DEFINE_PER_CPU(struct hrtimer, histtimer);

static struct lpm_debug *lpm_debug;

static phys_addr_t lpm_debug_phys;

static const int num_dbg_elements = 0x100;
@@ -345,7 +345,10 @@ static enum hrtimer_restart lpm_hrtimer_cb(struct hrtimer *h) 


static void histtimer_cancel(void)

{

	hrtimer_try_to_cancel(&histtimer);

	unsigned int cpu = raw_smp_processor_id();

	struct hrtimer *cpu_histtimer = &per_cpu(histtimer, cpu);



	hrtimer_try_to_cancel(cpu_histtimer);

}



static enum hrtimer_restart histtimer_fn(struct hrtimer *h)
@@ -361,9 +364,11 @@ static void histtimer_start(uint32_t time_us) 
{

	uint64_t time_ns = time_us * NSEC_PER_USEC;

	ktime_t hist_ktime = ns_to_ktime(time_ns);

	unsigned int cpu = raw_smp_processor_id();

	struct hrtimer *cpu_histtimer = &per_cpu(histtimer, cpu);



	histtimer.function = histtimer_fn;

	hrtimer_start(&histtimer, hist_ktime, HRTIMER_MODE_REL_PINNED);

	cpu_histtimer->function = histtimer_fn;

	hrtimer_start(cpu_histtimer, hist_ktime, HRTIMER_MODE_REL_PINNED);

}



static void cluster_timer_init(struct lpm_cluster *cluster)
@@ -1643,6 +1648,8 @@ static int lpm_probe(struct platform_device *pdev) 
{

	int ret;

	int size;

	unsigned int cpu;

	struct hrtimer *cpu_histtimer;

	struct kobject *module_kobj = NULL;

	struct md_region md_entry;
@@ -1666,7 +1673,11 @@ static int lpm_probe(struct platform_device *pdev) 
	 */

	suspend_set_ops(&lpm_suspend_ops);

	hrtimer_init(&lpm_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);

	hrtimer_init(&histtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);

	for_each_possible_cpu(cpu) {

		cpu_histtimer = &per_cpu(histtimer, cpu);

		hrtimer_init(cpu_histtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);

	}



	cluster_timer_init(lpm_root_node);



	size = num_dbg_elements * sizeof(struct lpm_debug);