Linux-libre 4.8.2-gnupck-4.8.2-gnu

9 files changed, 244 insertions, 98 deletions

diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index c5a7de9bc..3b205e212 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -132,6 +132,19 @@ config SUNXI_RSB
 	  with various RSB based devices, such as AXP223, AXP8XX PMICs,
 	  and AC100/AC200 ICs.
 
+# TODO: This uses pm_clk_*() symbols that aren't exported in v4.7 and hence
+# the driver will fail to build as a module. However there are patches to
+# address that queued for v4.8, so this can be turned into a tristate symbol
+# after v4.8-rc1.
+config TEGRA_ACONNECT
+	bool "Tegra ACONNECT Bus Driver"
+	depends on ARCH_TEGRA_210_SOC
+	depends on OF && PM
+	select PM_CLK
+	help
+	  Driver for the Tegra ACONNECT bus which is used to interface with
+	  the devices inside the Audio Processing Engine (APE) for Tegra210.
+
 config UNIPHIER_SYSTEM_BUS
 	tristate "UniPhier System Bus driver"
 	depends on ARCH_UNIPHIER && OF
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index ccff007ee..ac84cc434 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -17,5 +17,6 @@ obj-$(CONFIG_OMAP_INTERCONNECT)	+= omap_l3_smx.o omap_l3_noc.o
 obj-$(CONFIG_OMAP_OCP2SCP)	+= omap-ocp2scp.o
 obj-$(CONFIG_SUNXI_RSB)		+= sunxi-rsb.o
 obj-$(CONFIG_SIMPLE_PM_BUS)	+= simple-pm-bus.o
+obj-$(CONFIG_TEGRA_ACONNECT)	+= tegra-aconnect.o
 obj-$(CONFIG_UNIPHIER_SYSTEM_BUS)	+= uniphier-system-bus.o
 obj-$(CONFIG_VEXPRESS_CONFIG)	+= vexpress-config.o
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index a49b28378..ffa7c9dcb 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -144,12 +144,15 @@ struct cci_pmu {
 	int num_cntrs;
 	atomic_t active_events;
 	struct mutex reserve_mutex;
-	struct notifier_block cpu_nb;
+	struct list_head entry;
 	cpumask_t cpus;
 };
 
 #define to_cci_pmu(c)	(container_of(c, struct cci_pmu, pmu))
 
+static DEFINE_MUTEX(cci_pmu_mutex);
+static LIST_HEAD(cci_pmu_list);
+
 enum cci_models {
 #ifdef CONFIG_ARM_CCI400_PMU
 	CCI400_R0,
@@ -548,7 +551,7 @@ static struct attribute *cci5xx_pmu_event_attrs[] = {
 	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_wrq, 0xB),
 	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_cd_hs, 0xC),
 	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD),
-	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snopp_rq_stall_tt_full, 0xE),
+	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_stall_tt_full, 0xE),
 	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF),
 	NULL
 };
@@ -1503,31 +1506,26 @@ static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
 	return perf_pmu_register(&cci_pmu->pmu, name, -1);
 }
 
-static int cci_pmu_cpu_notifier(struct notifier_block *self,
-				unsigned long action, void *hcpu)
+static int cci_pmu_offline_cpu(unsigned int cpu)
 {
-	struct cci_pmu *cci_pmu = container_of(self,
-					struct cci_pmu, cpu_nb);
-	unsigned int cpu = (long)hcpu;
+	struct cci_pmu *cci_pmu;
 	unsigned int target;
 
-	switch (action & ~CPU_TASKS_FROZEN) {
-	case CPU_DOWN_PREPARE:
+	mutex_lock(&cci_pmu_mutex);
+	list_for_each_entry(cci_pmu, &cci_pmu_list, entry) {
 		if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
-			break;
+			continue;
 		target = cpumask_any_but(cpu_online_mask, cpu);
-		if (target >= nr_cpu_ids) // UP, last CPU
-			break;
+		if (target >= nr_cpu_ids)
+			continue;
 		/*
 		 * TODO: migrate context once core races on event->ctx have
 		 * been fixed.
 		 */
 		cpumask_set_cpu(target, &cci_pmu->cpus);
-	default:
-		break;
 	}
-
-	return NOTIFY_OK;
+	mutex_unlock(&cci_pmu_mutex);
+	return 0;
 }
 
 static struct cci_pmu_model cci_pmu_models[] = {
@@ -1766,24 +1764,13 @@ static int cci_pmu_probe(struct platform_device *pdev)
 	atomic_set(&cci_pmu->active_events, 0);
 	cpumask_set_cpu(smp_processor_id(), &cci_pmu->cpus);
 
-	cci_pmu->cpu_nb = (struct notifier_block) {
-		.notifier_call	= cci_pmu_cpu_notifier,
-		/*
-		 * to migrate uncore events, our notifier should be executed
-		 * before perf core's notifier.
-		 */
-		.priority	= CPU_PRI_PERF + 1,
-	};
-
-	ret = register_cpu_notifier(&cci_pmu->cpu_nb);
+	ret = cci_pmu_init(cci_pmu, pdev);
 	if (ret)
 		return ret;
 
-	ret = cci_pmu_init(cci_pmu, pdev);
-	if (ret) {
-		unregister_cpu_notifier(&cci_pmu->cpu_nb);
-		return ret;
-	}
+	mutex_lock(&cci_pmu_mutex);
+	list_add(&cci_pmu->entry, &cci_pmu_list);
+	mutex_unlock(&cci_pmu_mutex);
 
 	pr_info("ARM %s PMU driver probed", cci_pmu->model->name);
 	return 0;
@@ -1817,6 +1804,12 @@ static int __init cci_platform_init(void)
 {
 	int ret;
 
+	ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
+					"AP_PERF_ARM_CCI_ONLINE", NULL,
+					cci_pmu_offline_cpu);
+	if (ret)
+		return ret;
+
 	ret = platform_driver_register(&cci_pmu_driver);
 	if (ret)
 		return ret;
diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c
index d88372b79..884c0305e 100644
--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -167,7 +167,7 @@ struct arm_ccn_dt {
 	struct hrtimer hrtimer;
 
 	cpumask_t cpu;
-	struct notifier_block cpu_nb;
+	struct list_head entry;
 
 	struct pmu pmu;
 };
@@ -190,6 +190,8 @@ struct arm_ccn {
 	int mn_id;
 };
 
+static DEFINE_MUTEX(arm_ccn_mutex);
+static LIST_HEAD(arm_ccn_list);
 
 static int arm_ccn_node_to_xp(int node)
 {
@@ -211,6 +213,7 @@ static int arm_ccn_node_to_xp_port(int node)
 #define CCN_CONFIG_TYPE(_config)	(((_config) >> 8) & 0xff)
 #define CCN_CONFIG_EVENT(_config)	(((_config) >> 16) & 0xff)
 #define CCN_CONFIG_PORT(_config)	(((_config) >> 24) & 0x3)
+#define CCN_CONFIG_BUS(_config)		(((_config) >> 24) & 0x3)
 #define CCN_CONFIG_VC(_config)		(((_config) >> 26) & 0x7)
 #define CCN_CONFIG_DIR(_config)		(((_config) >> 29) & 0x1)
 #define CCN_CONFIG_MASK(_config)	(((_config) >> 30) & 0xf)
@@ -240,6 +243,7 @@ static CCN_FORMAT_ATTR(xp, "config:0-7");
 static CCN_FORMAT_ATTR(type, "config:8-15");
 static CCN_FORMAT_ATTR(event, "config:16-23");
 static CCN_FORMAT_ATTR(port, "config:24-25");
+static CCN_FORMAT_ATTR(bus, "config:24-25");
 static CCN_FORMAT_ATTR(vc, "config:26-28");
 static CCN_FORMAT_ATTR(dir, "config:29-29");
 static CCN_FORMAT_ATTR(mask, "config:30-33");
@@ -252,6 +256,7 @@ static struct attribute *arm_ccn_pmu_format_attrs[] = {
 	&arm_ccn_pmu_format_attr_type.attr.attr,
 	&arm_ccn_pmu_format_attr_event.attr.attr,
 	&arm_ccn_pmu_format_attr_port.attr.attr,
+	&arm_ccn_pmu_format_attr_bus.attr.attr,
 	&arm_ccn_pmu_format_attr_vc.attr.attr,
 	&arm_ccn_pmu_format_attr_dir.attr.attr,
 	&arm_ccn_pmu_format_attr_mask.attr.attr,
@@ -349,10 +354,14 @@ static ssize_t arm_ccn_pmu_event_show(struct device *dev,
 		break;
 	case CCN_TYPE_XP:
 		res += snprintf(buf + res, PAGE_SIZE - res,
-				",xp=?,port=?,vc=?,dir=?");
+				",xp=?,vc=?");
 		if (event->event == CCN_EVENT_WATCHPOINT)
 			res += snprintf(buf + res, PAGE_SIZE - res,
-					",cmp_l=?,cmp_h=?,mask=?");
+					",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
+		else
+			res += snprintf(buf + res, PAGE_SIZE - res,
+					",bus=?");
+
 		break;
 	case CCN_TYPE_MN:
 		res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
@@ -736,9 +745,10 @@ static int arm_ccn_pmu_event_init(struct perf_event *event)
 
 	if (has_branch_stack(event) || event->attr.exclude_user ||
 			event->attr.exclude_kernel || event->attr.exclude_hv ||
-			event->attr.exclude_idle) {
+			event->attr.exclude_idle || event->attr.exclude_host ||
+			event->attr.exclude_guest) {
 		dev_warn(ccn->dev, "Can't exclude execution levels!\n");
-		return -EOPNOTSUPP;
+		return -EINVAL;
 	}
 
 	if (event->cpu < 0) {
@@ -930,38 +940,17 @@ static void arm_ccn_pmu_event_start(struct perf_event *event, int flags)
 			arm_ccn_pmu_read_counter(ccn, hw->idx));
 	hw->state = 0;
 
-	/*
-	 * Pin the timer, so that the overflows are handled by the chosen
-	 * event->cpu (this is the same one as presented in "cpumask"
-	 * attribute).
-	 */
-	if (!ccn->irq)
-		hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
-				HRTIMER_MODE_REL_PINNED);
-
 	/* Set the DT bus input, engaging the counter */
 	arm_ccn_pmu_xp_dt_config(event, 1);
 }
 
 static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags)
 {
-	struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
 	struct hw_perf_event *hw = &event->hw;
-	u64 timeout;
 
 	/* Disable counting, setting the DT bus to pass-through mode */
 	arm_ccn_pmu_xp_dt_config(event, 0);
 
-	if (!ccn->irq)
-		hrtimer_cancel(&ccn->dt.hrtimer);
-
-	/* Let the DT bus drain */
-	timeout = arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) +
-			ccn->num_xps;
-	while (arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) <
-			timeout)
-		cpu_relax();
-
 	if (flags & PERF_EF_UPDATE)
 		arm_ccn_pmu_event_update(event);
 
@@ -1027,7 +1016,7 @@ static void arm_ccn_pmu_xp_event_config(struct perf_event *event)
 	hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base);
 
 	id = (CCN_CONFIG_VC(event->attr.config) << 4) |
-			(CCN_CONFIG_PORT(event->attr.config) << 3) |
+			(CCN_CONFIG_BUS(event->attr.config) << 3) |
 			(CCN_CONFIG_EVENT(event->attr.config) << 0);
 
 	val = readl(source->base + CCN_XP_PMU_EVENT_SEL);
@@ -1112,15 +1101,31 @@ static void arm_ccn_pmu_event_config(struct perf_event *event)
 	spin_unlock(&ccn->dt.config_lock);
 }
 
+static int arm_ccn_pmu_active_counters(struct arm_ccn *ccn)
+{
+	return bitmap_weight(ccn->dt.pmu_counters_mask,
+			     CCN_NUM_PMU_EVENT_COUNTERS + 1);
+}
+
 static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
 {
 	int err;
 	struct hw_perf_event *hw = &event->hw;
+	struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
 
 	err = arm_ccn_pmu_event_alloc(event);
 	if (err)
 		return err;
 
+	/*
+	 * Pin the timer, so that the overflows are handled by the chosen
+	 * event->cpu (this is the same one as presented in "cpumask"
+	 * attribute).
+	 */
+	if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 1)
+		hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
+			      HRTIMER_MODE_REL_PINNED);
+
 	arm_ccn_pmu_event_config(event);
 
 	hw->state = PERF_HES_STOPPED;
@@ -1133,9 +1138,14 @@ static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
 
 static void arm_ccn_pmu_event_del(struct perf_event *event, int flags)
 {
+	struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
+
 	arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE);
 
 	arm_ccn_pmu_event_release(event);
+
+	if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 0)
+		hrtimer_cancel(&ccn->dt.hrtimer);
 }
 
 static void arm_ccn_pmu_event_read(struct perf_event *event)
@@ -1143,6 +1153,24 @@ static void arm_ccn_pmu_event_read(struct perf_event *event)
 	arm_ccn_pmu_event_update(event);
 }
 
+static void arm_ccn_pmu_enable(struct pmu *pmu)
+{
+	struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
+
+	u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
+	val |= CCN_DT_PMCR__PMU_EN;
+	writel(val, ccn->dt.base + CCN_DT_PMCR);
+}
+
+static void arm_ccn_pmu_disable(struct pmu *pmu)
+{
+	struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
+
+	u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
+	val &= ~CCN_DT_PMCR__PMU_EN;
+	writel(val, ccn->dt.base + CCN_DT_PMCR);
+}
+
 static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt)
 {
 	u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR);
@@ -1186,30 +1214,27 @@ static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer)
 }
 
 
-static int arm_ccn_pmu_cpu_notifier(struct notifier_block *nb,
-		unsigned long action, void *hcpu)
+static int arm_ccn_pmu_offline_cpu(unsigned int cpu)
 {
-	struct arm_ccn_dt *dt = container_of(nb, struct arm_ccn_dt, cpu_nb);
-	struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
-	unsigned int cpu = (long)hcpu; /* for (long) see kernel/cpu.c */
+	struct arm_ccn_dt *dt;
 	unsigned int target;
 
-	switch (action & ~CPU_TASKS_FROZEN) {
-	case CPU_DOWN_PREPARE:
+	mutex_lock(&arm_ccn_mutex);
+	list_for_each_entry(dt, &arm_ccn_list, entry) {
+		struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
+
 		if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
-			break;
+			continue;
 		target = cpumask_any_but(cpu_online_mask, cpu);
 		if (target >= nr_cpu_ids)
-			break;
+			continue;
 		perf_pmu_migrate_context(&dt->pmu, cpu, target);
 		cpumask_set_cpu(target, &dt->cpu);
 		if (ccn->irq)
 			WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0);
-	default:
-		break;
 	}
-
-	return NOTIFY_OK;
+	mutex_unlock(&arm_ccn_mutex);
+	return 0;
 }
 
 
@@ -1268,6 +1293,8 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
 		.start = arm_ccn_pmu_event_start,
 		.stop = arm_ccn_pmu_event_stop,
 		.read = arm_ccn_pmu_event_read,
+		.pmu_enable = arm_ccn_pmu_enable,
+		.pmu_disable = arm_ccn_pmu_disable,
 	};
 
 	/* No overflow interrupt? Have to use a timer instead. */
@@ -1281,16 +1308,6 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
 	/* Pick one CPU which we will use to collect data from CCN... */
 	cpumask_set_cpu(smp_processor_id(), &ccn->dt.cpu);
 
-	/*
-	 * ... and change the selection when it goes offline. Priority is
-	 * picked to have a chance to migrate events before perf is notified.
-	 */
-	ccn->dt.cpu_nb.notifier_call = arm_ccn_pmu_cpu_notifier;
-	ccn->dt.cpu_nb.priority = CPU_PRI_PERF + 1,
-	err = register_cpu_notifier(&ccn->dt.cpu_nb);
-	if (err)
-		goto error_cpu_notifier;
-
 	/* Also make sure that the overflow interrupt is handled by this CPU */
 	if (ccn->irq) {
 		err = irq_set_affinity_hint(ccn->irq, &ccn->dt.cpu);
@@ -1304,12 +1321,13 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
 	if (err)
 		goto error_pmu_register;
 
+	mutex_lock(&arm_ccn_mutex);
+	list_add(&ccn->dt.entry, &arm_ccn_list);
+	mutex_unlock(&arm_ccn_mutex);
 	return 0;
 
 error_pmu_register:
 error_set_affinity:
-	unregister_cpu_notifier(&ccn->dt.cpu_nb);
-error_cpu_notifier:
 	ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
 	for (i = 0; i < ccn->num_xps; i++)
 		writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
@@ -1321,9 +1339,12 @@ static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
 {
 	int i;
 
+	mutex_lock(&arm_ccn_mutex);
+	list_del(&ccn->dt.entry);
+	mutex_unlock(&arm_ccn_mutex);
+
 	if (ccn->irq)
 		irq_set_affinity_hint(ccn->irq, NULL);
-	unregister_cpu_notifier(&ccn->dt.cpu_nb);
 	for (i = 0; i < ccn->num_xps; i++)
 		writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
 	writel(0, ccn->dt.base + CCN_DT_PMCR);
@@ -1331,7 +1352,6 @@ static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
 	ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
 }
 
-
 static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn,
 		int (*callback)(struct arm_ccn *ccn, int region,
 		void __iomem *base, u32 type, u32 id))
@@ -1496,8 +1516,9 @@ static int arm_ccn_probe(struct platform_device *pdev)
 		/* Can set 'disable' bits, so can acknowledge interrupts */
 		writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE,
 				ccn->base + CCN_MN_ERRINT_STATUS);
-		err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler, 0,
-				dev_name(ccn->dev), ccn);
+		err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler,
+				       IRQF_NOBALANCING | IRQF_NO_THREAD,
+				       dev_name(ccn->dev), ccn);
 		if (err)
 			return err;
 
@@ -1550,7 +1571,13 @@ static struct platform_driver arm_ccn_driver = {
 
 static int __init arm_ccn_init(void)
 {
-	int i;
+	int i, ret;
+
+	ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
+					"AP_PERF_ARM_CCN_ONLINE", NULL,
+					arm_ccn_pmu_offline_cpu);
+	if (ret)
+		return ret;
 
 	for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
 		arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
@@ -1560,6 +1587,7 @@ static int __init arm_ccn_init(void)
 
 static void __exit arm_ccn_exit(void)
 {
+	cpuhp_remove_state_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE);
 	platform_driver_unregister(&arm_ccn_driver);
 }
 
diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c
index 1827fc4d1..4bd361d64 100644
--- a/drivers/bus/imx-weim.c
+++ b/drivers/bus/imx-weim.c
@@ -163,9 +163,8 @@ static int __init weim_parse_dt(struct platform_device *pdev,
 	}
 
 	if (have_child)
-		ret = of_platform_populate(pdev->dev.of_node,
-				   of_default_bus_match_table,
-				   NULL, &pdev->dev);
+		ret = of_platform_default_populate(pdev->dev.of_node,
+						   NULL, &pdev->dev);
 	if (ret)
 		dev_err(&pdev->dev, "%s fail to create devices.\n",
 			pdev->dev.of_node->full_name);
diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
index ce54a0160..c7f396903 100644
--- a/drivers/bus/mvebu-mbus.c
+++ b/drivers/bus/mvebu-mbus.c
@@ -117,7 +117,7 @@ struct mvebu_mbus_soc_data {
 	unsigned int (*win_remap_offset)(const int win);
 	void (*setup_cpu_target)(struct mvebu_mbus_state *s);
 	int (*save_cpu_target)(struct mvebu_mbus_state *s,
-			       u32 *store_addr);
+			       u32 __iomem *store_addr);
 	int (*show_cpu_target)(struct mvebu_mbus_state *s,
 			       struct seq_file *seq, void *v);
 };
@@ -728,7 +728,7 @@ mvebu_mbus_default_setup_cpu_target(struct mvebu_mbus_state *mbus)
 
 static int
 mvebu_mbus_default_save_cpu_target(struct mvebu_mbus_state *mbus,
-				   u32 *store_addr)
+				   u32 __iomem *store_addr)
 {
 	int i;
 
@@ -780,7 +780,7 @@ mvebu_mbus_dove_setup_cpu_target(struct mvebu_mbus_state *mbus)
 
 static int
 mvebu_mbus_dove_save_cpu_target(struct mvebu_mbus_state *mbus,
-				u32 *store_addr)
+				u32 __iomem *store_addr)
 {
 	int i;
 
@@ -796,7 +796,7 @@ mvebu_mbus_dove_save_cpu_target(struct mvebu_mbus_state *mbus,
 	return 4;
 }
 
-int mvebu_mbus_save_cpu_target(u32 *store_addr)
+int mvebu_mbus_save_cpu_target(u32 __iomem *store_addr)
 {
 	return mbus_state.soc->save_cpu_target(&mbus_state, store_addr);
 }
@@ -1089,7 +1089,7 @@ static void mvebu_mbus_resume(void)
 	}
 }
 
-struct syscore_ops mvebu_mbus_syscore_ops = {
+static struct syscore_ops mvebu_mbus_syscore_ops = {
 	.suspend	= mvebu_mbus_suspend,
 	.resume		= mvebu_mbus_resume,
 };
diff --git a/drivers/bus/tegra-aconnect.c b/drivers/bus/tegra-aconnect.c
new file mode 100644
index 000000000..7e4104b74
--- /dev/null
+++ b/drivers/bus/tegra-aconnect.c
@@ -0,0 +1,112 @@
+/*
+ * Tegra ACONNECT Bus Driver
+ *
+ * Copyright (C) 2016, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+
+static int tegra_aconnect_add_clock(struct device *dev, char *name)
+{
+	struct clk *clk;
+	int ret;
+
+	clk = clk_get(dev, name);
+	if (IS_ERR(clk)) {
+		dev_err(dev, "%s clock not found\n", name);
+		return PTR_ERR(clk);
+	}
+
+	ret = pm_clk_add_clk(dev, clk);
+	if (ret)
+		clk_put(clk);
+
+	return ret;
+}
+
+static int tegra_aconnect_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -EINVAL;
+
+	ret = pm_clk_create(&pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = tegra_aconnect_add_clock(&pdev->dev, "ape");
+	if (ret)
+		goto clk_destroy;
+
+	ret = tegra_aconnect_add_clock(&pdev->dev, "apb2ape");
+	if (ret)
+		goto clk_destroy;
+
+	pm_runtime_enable(&pdev->dev);
+
+	of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+
+	dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n");
+
+	return 0;
+
+clk_destroy:
+	pm_clk_destroy(&pdev->dev);
+
+	return ret;
+}
+
+static int tegra_aconnect_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+
+	pm_clk_destroy(&pdev->dev);
+
+	return 0;
+}
+
+static int tegra_aconnect_runtime_resume(struct device *dev)
+{
+	return pm_clk_resume(dev);
+}
+
+static int tegra_aconnect_runtime_suspend(struct device *dev)
+{
+	return pm_clk_suspend(dev);
+}
+
+static const struct dev_pm_ops tegra_aconnect_pm_ops = {
+	SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend,
+			   tegra_aconnect_runtime_resume, NULL)
+};
+
+static const struct of_device_id tegra_aconnect_of_match[] = {
+	{ .compatible = "nvidia,tegra210-aconnect", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);
+
+static struct platform_driver tegra_aconnect_driver = {
+	.probe = tegra_aconnect_probe,
+	.remove = tegra_aconnect_remove,
+	.driver = {
+		.name = "tegra-aconnect",
+		.of_match_table = tegra_aconnect_of_match,
+		.pm = &tegra_aconnect_pm_ops,
+	},
+};
+module_platform_driver(tegra_aconnect_driver);
+
+MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver");
+MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/uniphier-system-bus.c b/drivers/bus/uniphier-system-bus.c
index 350b7309c..1e6e0269e 100644
--- a/drivers/bus/uniphier-system-bus.c
+++ b/drivers/bus/uniphier-system-bus.c
@@ -257,8 +257,7 @@ static int uniphier_system_bus_probe(struct platform_device *pdev)
 	uniphier_system_bus_set_reg(priv);
 
 	/* Now, the bus is configured.  Populate platform_devices below it */
-	return of_platform_populate(dev->of_node, of_default_bus_match_table,
-				    NULL, dev);
+	return of_platform_default_populate(dev->of_node, NULL, dev);
 }
 
 static const struct of_device_id uniphier_system_bus_match[] = {
diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c
index c3cb76b36..9efdf1de4 100644
--- a/drivers/bus/vexpress-config.c
+++ b/drivers/bus/vexpress-config.c
@@ -178,6 +178,7 @@ static int vexpress_config_populate(struct device_node *node)
 
 	parent = class_find_device(vexpress_config_class, NULL, bridge,
 			vexpress_config_node_match);
+	of_node_put(bridge);
 	if (WARN_ON(!parent))
 		return -ENODEV;