Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 135 insertions, 64 deletions

diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
index 3846941801b..d49e891b567 100644
--- a/drivers/extcon/extcon-max14577.c
+++ b/drivers/extcon/extcon-max14577.c
@@ -1,8 +1,9 @@
 /*
- * extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC
+ * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
  *
- * Copyright (C) 2013 Samsung Electrnoics
+ * Copyright (C) 2013,2014 Samsung Electrnoics
  * Chanwoo Choi <cw00.choi@samsung.com>
+ * Krzysztof Kozlowski <k.kozlowski@samsung.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,7 +25,6 @@
 #include <linux/mfd/max14577-private.h>
 #include <linux/extcon.h>
 
-#define	DEV_NAME			"max14577-muic"
 #define	DELAY_MS_DEFAULT		17000		/* unit: millisecond */
 
 enum max14577_muic_adc_debounce_time {
@@ -40,6 +40,42 @@ enum max14577_muic_status {
 	MAX14577_MUIC_STATUS_END,
 };
 
+/**
+ * struct max14577_muic_irq
+ * @irq: the index of irq list of MUIC device.
+ * @name: the name of irq.
+ * @virq: the virtual irq to use irq domain
+ */
+struct max14577_muic_irq {
+	unsigned int irq;
+	const char *name;
+	unsigned int virq;
+};
+
+static struct max14577_muic_irq max14577_muic_irqs[] = {
+	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
+	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
+	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
+	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
+	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
+	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
+	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
+	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
+};
+
+static struct max14577_muic_irq max77836_muic_irqs[] = {
+	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
+	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
+	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
+	{ MAX77836_IRQ_INT1_ADC1K,	"muic-ADC1K" },
+	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
+	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
+	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
+	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
+	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
+	{ MAX77836_IRQ_INT2_VIDRM,	"muic-VIDRM" },
+};
+
 struct max14577_muic_info {
 	struct device *dev;
 	struct max14577 *max14577;
@@ -48,6 +84,8 @@ struct max14577_muic_info {
 	int prev_chg_type;
 	u8 status[MAX14577_MUIC_STATUS_END];
 
+	struct max14577_muic_irq *muic_irqs;
+	unsigned int muic_irqs_num;
 	bool irq_adc;
 	bool irq_chg;
 	struct work_struct irq_work;
@@ -74,29 +112,6 @@ enum max14577_muic_cable_group {
 	MAX14577_CABLE_GROUP_CHG,
 };
 
-/**
- * struct max14577_muic_irq
- * @irq: the index of irq list of MUIC device.
- * @name: the name of irq.
- * @virq: the virtual irq to use irq domain
- */
-struct max14577_muic_irq {
-	unsigned int irq;
-	const char *name;
-	unsigned int virq;
-};
-
-static struct max14577_muic_irq muic_irqs[] = {
-	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
-	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
-	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
-	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
-	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
-	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
-	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
-	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
-};
-
 /* Define supported accessory type */
 enum max14577_muic_acc_type {
 	MAX14577_MUIC_ADC_GROUND = 0x0,
@@ -528,21 +543,12 @@ static void max14577_muic_irq_work(struct work_struct *work)
 	return;
 }
 
-static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
+/*
+ * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
+ * Returns 0 if irq_type does not match registered IRQ for this device type.
+ */
+static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
 {
-	struct max14577_muic_info *info = data;
-	int i, irq_type = -1;
-
-	/*
-	 * We may be called multiple times for different nested IRQ-s.
-	 * Including changes in INT1_ADC and INT2_CGHTYP at once.
-	 * However we only need to know whether it was ADC, charger
-	 * or both interrupts so decode IRQ and turn on proper flags.
-	 */
-	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
-		if (irq == muic_irqs[i].virq)
-			irq_type = muic_irqs[i].irq;
-
 	switch (irq_type) {
 	case MAX14577_IRQ_INT1_ADC:
 	case MAX14577_IRQ_INT1_ADCLOW:
@@ -550,7 +556,7 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
 		/* Handle all of accessory except for
 		   type of charger accessory */
 		info->irq_adc = true;
-		break;
+		return 1;
 	case MAX14577_IRQ_INT2_CHGTYP:
 	case MAX14577_IRQ_INT2_CHGDETRUN:
 	case MAX14577_IRQ_INT2_DCDTMR:
@@ -558,8 +564,62 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
 	case MAX14577_IRQ_INT2_VBVOLT:
 		/* Handle charger accessory */
 		info->irq_chg = true;
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+/*
+ * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
+ * Returns 0 if irq_type does not match registered IRQ for this device type.
+ */
+static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
+{
+	/* First check common max14577 interrupts */
+	if (max14577_parse_irq(info, irq_type))
+		return 1;
+
+	switch (irq_type) {
+	case MAX77836_IRQ_INT1_ADC1K:
+		info->irq_adc = true;
+		return 1;
+	case MAX77836_IRQ_INT2_VIDRM:
+		/* Handle charger accessory */
+		info->irq_chg = true;
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
+{
+	struct max14577_muic_info *info = data;
+	int i, irq_type = -1;
+	bool irq_parsed;
+
+	/*
+	 * We may be called multiple times for different nested IRQ-s.
+	 * Including changes in INT1_ADC and INT2_CGHTYP at once.
+	 * However we only need to know whether it was ADC, charger
+	 * or both interrupts so decode IRQ and turn on proper flags.
+	 */
+	for (i = 0; i < info->muic_irqs_num; i++)
+		if (irq == info->muic_irqs[i].virq)
+			irq_type = info->muic_irqs[i].irq;
+
+	switch (info->max14577->dev_type) {
+	case MAXIM_DEVICE_TYPE_MAX77836:
+		irq_parsed = max77836_parse_irq(info, irq_type);
 		break;
+	case MAXIM_DEVICE_TYPE_MAX14577:
 	default:
+		irq_parsed = max14577_parse_irq(info, irq_type);
+		break;
+	}
+
+	if (!irq_parsed) {
 		dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
 				irq_type);
 		return IRQ_HANDLED;
@@ -644,13 +704,24 @@ static int max14577_muic_probe(struct platform_device *pdev)
 
 	INIT_WORK(&info->irq_work, max14577_muic_irq_work);
 
+	switch (max14577->dev_type) {
+	case MAXIM_DEVICE_TYPE_MAX77836:
+		info->muic_irqs = max77836_muic_irqs;
+		info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
+		break;
+	case MAXIM_DEVICE_TYPE_MAX14577:
+	default:
+		info->muic_irqs = max14577_muic_irqs;
+		info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
+	}
+
 	/* Support irq domain for max14577 MUIC device */
-	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
-		struct max14577_muic_irq *muic_irq = &muic_irqs[i];
+	for (i = 0; i < info->muic_irqs_num; i++) {
+		struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
 		unsigned int virq = 0;
 
 		virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
-		if (!virq)
+		if (virq <= 0)
 			return -EINVAL;
 		muic_irq->virq = virq;
 
@@ -668,14 +739,16 @@ static int max14577_muic_probe(struct platform_device *pdev)
 	}
 
 	/* Initialize extcon device */
-	info->edev = devm_kzalloc(&pdev->dev, sizeof(*info->edev), GFP_KERNEL);
-	if (!info->edev) {
+	info->edev = devm_extcon_dev_allocate(&pdev->dev,
+					      max14577_extcon_cable);
+	if (IS_ERR(info->edev)) {
 		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
 		return -ENOMEM;
 	}
-	info->edev->name = DEV_NAME;
-	info->edev->supported_cable = max14577_extcon_cable;
-	ret = extcon_dev_register(info->edev);
+
+	info->edev->name = dev_name(&pdev->dev);
+
+	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register extcon device\n");
 		return ret;
@@ -694,7 +767,7 @@ static int max14577_muic_probe(struct platform_device *pdev)
 			MAX14577_REG_DEVICEID, &id);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to read revision number\n");
-		goto err_extcon;
+		return ret;
 	}
 	dev_info(info->dev, "device ID : 0x%x\n", id);
 
@@ -710,19 +783,10 @@ static int max14577_muic_probe(struct platform_device *pdev)
 	 * driver should notify cable state to upper layer.
 	 */
 	INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
-	ret = queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 			delay_jiffies);
-	if (ret < 0) {
-		dev_err(&pdev->dev,
-			"failed to schedule delayed work for cable detect\n");
-		goto err_extcon;
-	}
 
 	return ret;
-
-err_extcon:
-	extcon_dev_unregister(info->edev);
-	return ret;
 }
 
 static int max14577_muic_remove(struct platform_device *pdev)
@@ -730,23 +794,30 @@ static int max14577_muic_remove(struct platform_device *pdev)
 	struct max14577_muic_info *info = platform_get_drvdata(pdev);
 
 	cancel_work_sync(&info->irq_work);
-	extcon_dev_unregister(info->edev);
 
 	return 0;
 }
 
+static const struct platform_device_id max14577_muic_id[] = {
+	{ "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
+	{ "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, max14577_muic_id);
+
 static struct platform_driver max14577_muic_driver = {
 	.driver		= {
-		.name	= DEV_NAME,
+		.name	= "max14577-muic",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= max14577_muic_probe,
 	.remove		= max14577_muic_remove,
+	.id_table	= max14577_muic_id,
 };
 
 module_platform_driver(max14577_muic_driver);
 
-MODULE_DESCRIPTION("MAXIM 14577 Extcon driver");
-MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:extcon-max14577");