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Commit 963b168f authored by Lina Iyer's avatar Lina Iyer Committed by Tushar Nimkar
Browse files

cpuidle: lpm-levels: no hotplug for single core 



Register for hotplug and dev_pm_qos notification only
for SMP so covering under CONFIG_SMP flag.

Change-Id: Ic3da9648a4dd5c762cd97dbb9f1915f79bd2481e
Signed-off-by: default avatarLina Iyer <ilina@codeaurora.org>
Signed-off-by: default avatarTushar Nimkar <tnimkar@codeaurora.org>
parent 6757e16b

drivers/cpuidle/lpm-levels.c

+8 −3
Original line number Diff line number Diff line
@@ -121,12 +121,14 @@ static void cluster_prepare(struct lpm_cluster *cluster, 
static bool sleep_disabled;

module_param_named(sleep_disabled, sleep_disabled, bool, 0664);



#ifdef CONFIG_SMP

static int lpm_cpu_qos_notify(struct notifier_block *nb,

		unsigned long val, void *ptr);



static struct notifier_block dev_pm_qos_nb[MAX_LPM_CPUS] = {

	[0 ... (MAX_LPM_CPUS - 1)] = { .notifier_call = lpm_cpu_qos_notify },

};

#endif



#ifdef CONFIG_SCHED_WALT

static bool check_cpu_isolated(int cpu)
@@ -140,6 +142,7 @@ static bool check_cpu_isolated(int cpu) 
}

#endif



#ifdef CONFIG_SMP

static int lpm_cpu_qos_notify(struct notifier_block *nb,

		unsigned long val, void *ptr)

{
@@ -171,6 +174,7 @@ static int lpm_online_cpu(unsigned int cpu) 
				DEV_PM_QOS_RESUME_LATENCY);

	return 0;

}

#endif



/**

 * msm_cpuidle_get_deep_idle_latency - Get deep idle latency value
@@ -219,6 +223,7 @@ static void update_debug_pc_event(enum debug_event event, uint32_t arg1, 
	spin_unlock(&debug_lock);

}



#ifdef CONFIG_SMP

static int lpm_dying_cpu(unsigned int cpu)

{

	struct lpm_cluster *cluster = per_cpu(cpu_lpm, cpu)->parent;
@@ -241,7 +246,7 @@ static int lpm_starting_cpu(unsigned int cpu) 
						0, true);

	return 0;

}



#endif

static void histtimer_cancel(void)

{

	unsigned int cpu = raw_smp_processor_id();
@@ -1695,7 +1700,7 @@ static int lpm_probe(struct platform_device *pdev) 
		pr_err("Failed to register with cpuidle framework\n");

		goto failed;

	}



#ifdef CONFIG_SMP

	ret = cpuhp_setup_state(CPUHP_AP_QCOM_TIMER_STARTING,

			"AP_QCOM_SLEEP_STARTING",

			lpm_starting_cpu, lpm_dying_cpu);
@@ -1707,7 +1712,7 @@ static int lpm_probe(struct platform_device *pdev) 
			lpm_online_cpu, lpm_offline_cpu);

	if (ret)

		goto failed;



#endif

	module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);

	if (!module_kobj) {

		pr_err("Cannot find kobject for module %s\n", KBUILD_MODNAME);