These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

5 files changed, 267 insertions, 34 deletions

diff --git a/kernel/drivers/devfreq/devfreq.c b/kernel/drivers/devfreq/devfreq.c
index ca1b362d7..ca848cc6a 100644
--- a/kernel/drivers/devfreq/devfreq.c
+++ b/kernel/drivers/devfreq/devfreq.c
@@ -53,7 +53,7 @@ static struct devfreq *find_device_devfreq(struct device *dev)
 {
 	struct devfreq *tmp_devfreq;
 
-	if (unlikely(IS_ERR_OR_NULL(dev))) {
+	if (IS_ERR_OR_NULL(dev)) {
 		pr_err("DEVFREQ: %s: Invalid parameters\n", __func__);
 		return ERR_PTR(-EINVAL);
 	}
@@ -133,7 +133,7 @@ static struct devfreq_governor *find_devfreq_governor(const char *name)
 {
 	struct devfreq_governor *tmp_governor;
 
-	if (unlikely(IS_ERR_OR_NULL(name))) {
+	if (IS_ERR_OR_NULL(name)) {
 		pr_err("DEVFREQ: %s: Invalid parameters\n", __func__);
 		return ERR_PTR(-EINVAL);
 	}
@@ -177,10 +177,10 @@ int update_devfreq(struct devfreq *devfreq)
 		return err;
 
 	/*
-	 * Adjust the freuqency with user freq and QoS.
+	 * Adjust the frequency with user freq and QoS.
 	 *
-	 * List from the highest proiority
-	 * max_freq (probably called by thermal when it's too hot)
+	 * List from the highest priority
+	 * max_freq
 	 * min_freq
 	 */
 
@@ -482,7 +482,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
 						devfreq->profile->max_state *
 						devfreq->profile->max_state,
 						GFP_KERNEL);
-	devfreq->time_in_state = devm_kzalloc(dev, sizeof(unsigned int) *
+	devfreq->time_in_state = devm_kzalloc(dev, sizeof(unsigned long) *
 						devfreq->profile->max_state,
 						GFP_KERNEL);
 	devfreq->last_stat_updated = jiffies;
@@ -492,7 +492,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
 	if (err) {
 		put_device(&devfreq->dev);
 		mutex_unlock(&devfreq->lock);
-		goto err_dev;
+		goto err_out;
 	}
 
 	mutex_unlock(&devfreq->lock);
@@ -518,7 +518,6 @@ struct devfreq *devfreq_add_device(struct device *dev,
 err_init:
 	list_del(&devfreq->node);
 	device_unregister(&devfreq->dev);
-err_dev:
 	kfree(devfreq);
 err_out:
 	return ERR_PTR(err);
@@ -795,8 +794,10 @@ static ssize_t governor_store(struct device *dev, struct device_attribute *attr,
 		ret = PTR_ERR(governor);
 		goto out;
 	}
-	if (df->governor == governor)
+	if (df->governor == governor) {
+		ret = 0;
 		goto out;
+	}
 
 	if (df->governor) {
 		ret = df->governor->event_handler(df, DEVFREQ_GOV_STOP, NULL);
diff --git a/kernel/drivers/devfreq/event/exynos-ppmu.c b/kernel/drivers/devfreq/event/exynos-ppmu.c
index 7d99d13ba..f312485f1 100644
--- a/kernel/drivers/devfreq/event/exynos-ppmu.c
+++ b/kernel/drivers/devfreq/event/exynos-ppmu.c
@@ -1,7 +1,7 @@
 /*
  * exynos_ppmu.c - EXYNOS PPMU (Platform Performance Monitoring Unit) support
  *
- * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2014-2015 Samsung Electronics Co., Ltd.
  * Author : Chanwoo Choi <cw00.choi@samsung.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -82,6 +82,15 @@ struct __exynos_ppmu_events {
 	PPMU_EVENT(mscl),
 	PPMU_EVENT(fimd0x),
 	PPMU_EVENT(fimd1x),
+
+	/* Only for Exynos5433 SoCs */
+	PPMU_EVENT(d0-cpu),
+	PPMU_EVENT(d0-general),
+	PPMU_EVENT(d0-rt),
+	PPMU_EVENT(d1-cpu),
+	PPMU_EVENT(d1-general),
+	PPMU_EVENT(d1-rt),
+
 	{ /* sentinel */ },
 };
 
@@ -96,6 +105,9 @@ static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev)
 	return -EINVAL;
 }
 
+/*
+ * The devfreq-event ops structure for PPMU v1.1
+ */
 static int exynos_ppmu_disable(struct devfreq_event_dev *edev)
 {
 	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
@@ -200,10 +212,159 @@ static const struct devfreq_event_ops exynos_ppmu_ops = {
 	.get_event = exynos_ppmu_get_event,
 };
 
+/*
+ * The devfreq-event ops structure for PPMU v2.0
+ */
+static int exynos_ppmu_v2_disable(struct devfreq_event_dev *edev)
+{
+	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+	u32 pmnc, clear;
+
+	/* Disable all counters */
+	clear = (PPMU_CCNT_MASK | PPMU_PMCNT0_MASK | PPMU_PMCNT1_MASK
+		| PPMU_PMCNT2_MASK | PPMU_PMCNT3_MASK);
+
+	__raw_writel(clear, info->ppmu.base + PPMU_V2_FLAG);
+	__raw_writel(clear, info->ppmu.base + PPMU_V2_INTENC);
+	__raw_writel(clear, info->ppmu.base + PPMU_V2_CNTENC);
+	__raw_writel(clear, info->ppmu.base + PPMU_V2_CNT_RESET);
+
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_CFG0);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_CFG1);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_CFG2);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_RESULT);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CNT_AUTO);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV0_TYPE);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV1_TYPE);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV2_TYPE);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV3_TYPE);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_ID_V);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_ID_A);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_OTHERS_V);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_OTHERS_A);
+	__raw_writel(0x0, info->ppmu.base + PPMU_V2_INTERRUPT_RESET);
+
+	/* Disable PPMU */
+	pmnc = __raw_readl(info->ppmu.base + PPMU_V2_PMNC);
+	pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+	__raw_writel(pmnc, info->ppmu.base + PPMU_V2_PMNC);
+
+	return 0;
+}
+
+static int exynos_ppmu_v2_set_event(struct devfreq_event_dev *edev)
+{
+	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+	int id = exynos_ppmu_find_ppmu_id(edev);
+	u32 pmnc, cntens;
+
+	/* Enable all counters */
+	cntens = __raw_readl(info->ppmu.base + PPMU_V2_CNTENS);
+	cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+	__raw_writel(cntens, info->ppmu.base + PPMU_V2_CNTENS);
+
+	/* Set the event of Read/Write data count  */
+	switch (id) {
+	case PPMU_PMNCNT0:
+	case PPMU_PMNCNT1:
+	case PPMU_PMNCNT2:
+		__raw_writel(PPMU_V2_RO_DATA_CNT | PPMU_V2_WO_DATA_CNT,
+				info->ppmu.base + PPMU_V2_CH_EVx_TYPE(id));
+		break;
+	case PPMU_PMNCNT3:
+		__raw_writel(PPMU_V2_EVT3_RW_DATA_CNT,
+				info->ppmu.base + PPMU_V2_CH_EVx_TYPE(id));
+		break;
+	}
+
+	/* Reset cycle counter/performance counter and enable PPMU */
+	pmnc = __raw_readl(info->ppmu.base + PPMU_V2_PMNC);
+	pmnc &= ~(PPMU_PMNC_ENABLE_MASK
+			| PPMU_PMNC_COUNTER_RESET_MASK
+			| PPMU_PMNC_CC_RESET_MASK
+			| PPMU_PMNC_CC_DIVIDER_MASK
+			| PPMU_V2_PMNC_START_MODE_MASK);
+	pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT);
+	pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
+	pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
+	pmnc |= (PPMU_V2_MODE_MANUAL << PPMU_V2_PMNC_START_MODE_SHIFT);
+	__raw_writel(pmnc, info->ppmu.base + PPMU_V2_PMNC);
+
+	return 0;
+}
+
+static int exynos_ppmu_v2_get_event(struct devfreq_event_dev *edev,
+				    struct devfreq_event_data *edata)
+{
+	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+	int id = exynos_ppmu_find_ppmu_id(edev);
+	u32 pmnc, cntenc;
+	u32 pmcnt_high, pmcnt_low;
+	u64 load_count = 0;
+
+	/* Disable PPMU */
+	pmnc = __raw_readl(info->ppmu.base + PPMU_V2_PMNC);
+	pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+	__raw_writel(pmnc, info->ppmu.base + PPMU_V2_PMNC);
+
+	/* Read cycle count and performance count */
+	edata->total_count = __raw_readl(info->ppmu.base + PPMU_V2_CCNT);
+
+	switch (id) {
+	case PPMU_PMNCNT0:
+	case PPMU_PMNCNT1:
+	case PPMU_PMNCNT2:
+		load_count = __raw_readl(info->ppmu.base + PPMU_V2_PMNCT(id));
+		break;
+	case PPMU_PMNCNT3:
+		pmcnt_high = __raw_readl(info->ppmu.base + PPMU_V2_PMCNT3_HIGH);
+		pmcnt_low = __raw_readl(info->ppmu.base + PPMU_V2_PMCNT3_LOW);
+		load_count = ((u64)((pmcnt_high & 0xff)) << 32)
+			   + (u64)pmcnt_low;
+		break;
+	}
+	edata->load_count = load_count;
+
+	/* Disable all counters */
+	cntenc = __raw_readl(info->ppmu.base + PPMU_V2_CNTENC);
+	cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+	__raw_writel(cntenc, info->ppmu.base + PPMU_V2_CNTENC);
+
+	dev_dbg(&edev->dev, "%25s (load: %ld / %ld)\n", edev->desc->name,
+					edata->load_count, edata->total_count);
+	return 0;
+}
+
+static const struct devfreq_event_ops exynos_ppmu_v2_ops = {
+	.disable = exynos_ppmu_v2_disable,
+	.set_event = exynos_ppmu_v2_set_event,
+	.get_event = exynos_ppmu_v2_get_event,
+};
+
+static const struct of_device_id exynos_ppmu_id_match[] = {
+	{
+		.compatible = "samsung,exynos-ppmu",
+		.data = (void *)&exynos_ppmu_ops,
+	}, {
+		.compatible = "samsung,exynos-ppmu-v2",
+		.data = (void *)&exynos_ppmu_v2_ops,
+	},
+	{ /* sentinel */ },
+};
+
+static struct devfreq_event_ops *exynos_bus_get_ops(struct device_node *np)
+{
+	const struct of_device_id *match;
+
+	match = of_match_node(exynos_ppmu_id_match, np);
+	return (struct devfreq_event_ops *)match->data;
+}
+
 static int of_get_devfreq_events(struct device_node *np,
 				 struct exynos_ppmu *info)
 {
 	struct devfreq_event_desc *desc;
+	struct devfreq_event_ops *event_ops;
 	struct device *dev = info->dev;
 	struct device_node *events_np, *node;
 	int i, j, count;
@@ -214,6 +375,7 @@ static int of_get_devfreq_events(struct device_node *np,
 			"failed to get child node of devfreq-event devices\n");
 		return -EINVAL;
 	}
+	event_ops = exynos_bus_get_ops(np);
 
 	count = of_get_child_count(events_np);
 	desc = devm_kzalloc(dev, sizeof(*desc) * count, GFP_KERNEL);
@@ -238,7 +400,7 @@ static int of_get_devfreq_events(struct device_node *np,
 			continue;
 		}
 
-		desc[j].ops = &exynos_ppmu_ops;
+		desc[j].ops = event_ops;
 		desc[j].driver_data = info;
 
 		of_property_read_string(node, "event-name", &desc[j].name);
@@ -354,11 +516,6 @@ static int exynos_ppmu_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct of_device_id exynos_ppmu_id_match[] = {
-	{ .compatible = "samsung,exynos-ppmu", },
-	{ /* sentinel */ },
-};
-
 static struct platform_driver exynos_ppmu_driver = {
 	.probe	= exynos_ppmu_probe,
 	.remove	= exynos_ppmu_remove,
diff --git a/kernel/drivers/devfreq/event/exynos-ppmu.h b/kernel/drivers/devfreq/event/exynos-ppmu.h
index 4e831d48c..05774c449 100644
--- a/kernel/drivers/devfreq/event/exynos-ppmu.h
+++ b/kernel/drivers/devfreq/event/exynos-ppmu.h
@@ -26,6 +26,9 @@ enum ppmu_counter {
 	PPMU_PMNCNT_MAX,
 };
 
+/***
+ * PPMUv1.1 Definitions
+ */
 enum ppmu_event_type {
 	PPMU_RO_BUSY_CYCLE_CNT	= 0x0,
 	PPMU_WO_BUSY_CYCLE_CNT	= 0x1,
@@ -90,4 +93,71 @@ enum ppmu_reg {
 #define PPMU_PMNCT(x)			(PPMU_PMCNT0 + (0x10 * x))
 #define PPMU_BEVTxSEL(x)		(PPMU_BEVT0SEL + (0x100 * x))
 
+/***
+ * PPMU_V2.0 definitions
+ */
+enum ppmu_v2_mode {
+	PPMU_V2_MODE_MANUAL = 0,
+	PPMU_V2_MODE_AUTO = 1,
+	PPMU_V2_MODE_CIG = 2,	/* CIG (Conditional Interrupt Generation) */
+};
+
+enum ppmu_v2_event_type {
+	PPMU_V2_RO_DATA_CNT	= 0x4,
+	PPMU_V2_WO_DATA_CNT	= 0x5,
+
+	PPMU_V2_EVT3_RW_DATA_CNT = 0x22,	/* Only for Event3 */
+};
+
+enum ppmu_V2_reg {
+	/* PPC control register */
+	PPMU_V2_PMNC		= 0x04,
+	PPMU_V2_CNTENS		= 0x08,
+	PPMU_V2_CNTENC		= 0x0c,
+	PPMU_V2_INTENS		= 0x10,
+	PPMU_V2_INTENC		= 0x14,
+	PPMU_V2_FLAG		= 0x18,
+
+	/* Cycle Counter and Performance Event Counter Register */
+	PPMU_V2_CCNT		= 0x48,
+	PPMU_V2_PMCNT0		= 0x34,
+	PPMU_V2_PMCNT1		= 0x38,
+	PPMU_V2_PMCNT2		= 0x3c,
+	PPMU_V2_PMCNT3_LOW	= 0x40,
+	PPMU_V2_PMCNT3_HIGH	= 0x44,
+
+	/* Bus Event Generator */
+	PPMU_V2_CIG_CFG0		= 0x1c,
+	PPMU_V2_CIG_CFG1		= 0x20,
+	PPMU_V2_CIG_CFG2		= 0x24,
+	PPMU_V2_CIG_RESULT	= 0x28,
+	PPMU_V2_CNT_RESET	= 0x2c,
+	PPMU_V2_CNT_AUTO		= 0x30,
+	PPMU_V2_CH_EV0_TYPE	= 0x200,
+	PPMU_V2_CH_EV1_TYPE	= 0x204,
+	PPMU_V2_CH_EV2_TYPE	= 0x208,
+	PPMU_V2_CH_EV3_TYPE	= 0x20c,
+	PPMU_V2_SM_ID_V		= 0x220,
+	PPMU_V2_SM_ID_A		= 0x224,
+	PPMU_V2_SM_OTHERS_V	= 0x228,
+	PPMU_V2_SM_OTHERS_A	= 0x22c,
+	PPMU_V2_INTERRUPT_RESET	= 0x260,
+};
+
+/* PMNC register */
+#define PPMU_V2_PMNC_START_MODE_SHIFT	20
+#define PPMU_V2_PMNC_START_MODE_MASK	(0x3 << PPMU_V2_PMNC_START_MODE_SHIFT)
+
+#define PPMU_PMNC_CC_RESET_SHIFT	2
+#define PPMU_PMNC_COUNTER_RESET_SHIFT	1
+#define PPMU_PMNC_ENABLE_SHIFT		0
+#define PPMU_PMNC_START_MODE_MASK	BIT(16)
+#define PPMU_PMNC_CC_DIVIDER_MASK	BIT(3)
+#define PPMU_PMNC_CC_RESET_MASK		BIT(2)
+#define PPMU_PMNC_COUNTER_RESET_MASK	BIT(1)
+#define PPMU_PMNC_ENABLE_MASK		BIT(0)
+
+#define PPMU_V2_PMNCT(x)		(PPMU_V2_PMCNT0 + (0x4 * x))
+#define PPMU_V2_CH_EVx_TYPE(x)		(PPMU_V2_CH_EV0_TYPE + (0x4 * x))
+
 #endif /* __EXYNOS_PPMU_H__ */
diff --git a/kernel/drivers/devfreq/governor_simpleondemand.c b/kernel/drivers/devfreq/governor_simpleondemand.c
index 0720ba84c..ae72ba5e7 100644
--- a/kernel/drivers/devfreq/governor_simpleondemand.c
+++ b/kernel/drivers/devfreq/governor_simpleondemand.c
@@ -21,17 +21,20 @@
 static int devfreq_simple_ondemand_func(struct devfreq *df,
 					unsigned long *freq)
 {
-	struct devfreq_dev_status stat;
-	int err = df->profile->get_dev_status(df->dev.parent, &stat);
+	int err;
+	struct devfreq_dev_status *stat;
 	unsigned long long a, b;
 	unsigned int dfso_upthreshold = DFSO_UPTHRESHOLD;
 	unsigned int dfso_downdifferential = DFSO_DOWNDIFFERENCTIAL;
 	struct devfreq_simple_ondemand_data *data = df->data;
 	unsigned long max = (df->max_freq) ? df->max_freq : UINT_MAX;
 
+	err = devfreq_update_stats(df);
 	if (err)
 		return err;
 
+	stat = &df->last_status;
+
 	if (data) {
 		if (data->upthreshold)
 			dfso_upthreshold = data->upthreshold;
@@ -43,41 +46,41 @@ static int devfreq_simple_ondemand_func(struct devfreq *df,
 		return -EINVAL;
 
 	/* Assume MAX if it is going to be divided by zero */
-	if (stat.total_time == 0) {
+	if (stat->total_time == 0) {
 		*freq = max;
 		return 0;
 	}
 
 	/* Prevent overflow */
-	if (stat.busy_time >= (1 << 24) || stat.total_time >= (1 << 24)) {
-		stat.busy_time >>= 7;
-		stat.total_time >>= 7;
+	if (stat->busy_time >= (1 << 24) || stat->total_time >= (1 << 24)) {
+		stat->busy_time >>= 7;
+		stat->total_time >>= 7;
 	}
 
 	/* Set MAX if it's busy enough */
-	if (stat.busy_time * 100 >
-	    stat.total_time * dfso_upthreshold) {
+	if (stat->busy_time * 100 >
+	    stat->total_time * dfso_upthreshold) {
 		*freq = max;
 		return 0;
 	}
 
 	/* Set MAX if we do not know the initial frequency */
-	if (stat.current_frequency == 0) {
+	if (stat->current_frequency == 0) {
 		*freq = max;
 		return 0;
 	}
 
 	/* Keep the current frequency */
-	if (stat.busy_time * 100 >
-	    stat.total_time * (dfso_upthreshold - dfso_downdifferential)) {
-		*freq = stat.current_frequency;
+	if (stat->busy_time * 100 >
+	    stat->total_time * (dfso_upthreshold - dfso_downdifferential)) {
+		*freq = stat->current_frequency;
 		return 0;
 	}
 
 	/* Set the desired frequency based on the load */
-	a = stat.busy_time;
-	a *= stat.current_frequency;
-	b = div_u64(a, stat.total_time);
+	a = stat->busy_time;
+	a *= stat->current_frequency;
+	b = div_u64(a, stat->total_time);
 	b *= 100;
 	b = div_u64(b, (dfso_upthreshold - dfso_downdifferential / 2));
 	*freq = (unsigned long) b;
diff --git a/kernel/drivers/devfreq/tegra-devfreq.c b/kernel/drivers/devfreq/tegra-devfreq.c
index 13a1a6e81..848b93ee9 100644
--- a/kernel/drivers/devfreq/tegra-devfreq.c
+++ b/kernel/drivers/devfreq/tegra-devfreq.c
@@ -541,18 +541,20 @@ static struct devfreq_dev_profile tegra_devfreq_profile = {
 static int tegra_governor_get_target(struct devfreq *devfreq,
 				     unsigned long *freq)
 {
-	struct devfreq_dev_status stat;
+	struct devfreq_dev_status *stat;
 	struct tegra_devfreq *tegra;
 	struct tegra_devfreq_device *dev;
 	unsigned long target_freq = 0;
 	unsigned int i;
 	int err;
 
-	err = devfreq->profile->get_dev_status(devfreq->dev.parent, &stat);
+	err = devfreq_update_stats(devfreq);
 	if (err)
 		return err;
 
-	tegra = stat.private_data;
+	stat = &devfreq->last_status;
+
+	tegra = stat->private_data;
 
 	for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
 		dev = &tegra->devices[i];