[PATCH v2 0/3] power: Remove the deprecated extcon functions

[PATCH v2 0/3] power: Remove the deprecated extcon functions

[Chanwoo Choi]

This patch-set removes the deprecated notifier API of extcon framework and
then use the new extcon API[2] with the unique id[1] to indicate the each
external connector. Alter deprecated API as following:
- extcon_register_interest() -> extcon_register_notifier()
- extcon_unregister_interest() -> extcon_unregister_notifier()
- extcon_set_cable_state() -> extcon_set_cable_state_()
- extcon_get_cable_state() -> extcon_get_cable_state_()

And, extcon alters the name of USB charger connector in patch[3] as following:
- EXTCON_CHG_USB_SDP /* Standard Downstream Port */
- EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
- EXTCON_CHG_USB_CDP /* Charging Downstream Port */
- EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */

[1] Commit 2a9de9c0f08d61
- ("extcon: Use the unique id for external connector instead of string)
[2] Commit 046050f6e623e4
- ("extcon: Update the prototype of extcon_register_notifier() with enum extcon
[3] Commit 11eecf910bd81d
- ("extcon: Modify the id and name of external connector")

Changes from v1:
- Fix the typo (EXTCON_CHG_USB_SDP -> EXTCON_CHG_USB_CDP) on axp288_charger.c

Chanwoo Choi (3):
  power: charger-manager: Replace deprecatd API of extcon
  power: axp288_charger: Replace deprecatd API of extcon
  extcon: Remove the deprecated extcon functions

 .../bindings/power_supply/charger-manager.txt      |   4 +-
 drivers/extcon/extcon.c                            | 201 +++------------------
 drivers/power/axp288_charger.c                     |  77 +++++---
 drivers/power/charger-manager.c                    |  31 ++--
 include/linux/extcon.h                             |  59 ------
 include/linux/power/charger-manager.h              |   4 +-
 6 files changed, 101 insertions(+), 275 deletions(-)

-- 
1.9.1

[PATCH v2 1/3] power: charger-manager: Replace deprecatd API of extcon

[Chanwoo Choi]

This patch removes the deprecated notifier API of extcon framework and then use
the new extcon API[2] with the unique id[1] to indicate the each external
connector. Alter deprecated API as following:
- extcon_register_interest() -> extcon_register_notifier()
- extcon_unregister_interest() -> extcon_unregister_notifier()

And, extcon alters the name of USB charger connector in patch[3] as following:
- EXTCON_CHG_USB_SDP /* Standard Downstream Port */
- EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
- EXTCON_CHG_USB_CDP /* Charging Downstream Port */
- EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */

So, the name of external charger connector are changed as following:
- "USB" -> "SDP"
- "TA" -> "DCP"

[1] Commit 2a9de9c0f08d61
- ("extcon: Use the unique id for external connector instead of string)
[2] Commit 046050f6e623e4
- ("extcon: Update the prototype of extcon_register_notifier() with enum extcon
[3] Commit 11eecf910bd81d
- ("extcon: Modify the id and name of external connector")

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-By: Sebastian Reichel <sre@kernel.org>
---
 .../bindings/power_supply/charger-manager.txt      |  4 +--
 drivers/power/charger-manager.c                    | 31 ++++++++++++++--------
 include/linux/power/charger-manager.h              |  4 +--
 3 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/Documentation/devicetree/bindings/power_supply/charger-manager.txt b/Documentation/devicetree/bindings/power_supply/charger-manager.txt
index ec4fe9de3137..73193e380dc2 100644
--- a/Documentation/devicetree/bindings/power_supply/charger-manager.txt
+++ b/Documentation/devicetree/bindings/power_supply/charger-manager.txt
@@ -65,13 +65,13 @@ Example :
 		regulator@0 {
 			cm-regulator-name = "chg-reg";
 			cable@0 {
-				cm-cable-name = "USB";
+				cm-cable-id = 5; /* EXTCON_CHG_USB_SDP */
 				cm-cable-extcon = "extcon-dev.0";
 				cm-cable-min = <475000>;
 				cm-cable-max = <500000>;
 			};
 			cable@1 {
-				cm-cable-name = "TA";
+				cm-cable-id = 6; /* EXTCON_CHG_USB_DCP */
 				cm-cable-extcon = "extcon-dev.0";
 				cm-cable-min = <650000>;
 				cm-cable-max = <675000>;
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index e664ca7c0afd..ed63dc086eb6 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -1137,8 +1137,8 @@ static void charger_extcon_work(struct work_struct *work)
 		ret = regulator_set_current_limit(cable->charger->consumer,
 					cable->min_uA, cable->max_uA);
 		if (ret < 0) {
-			pr_err("Cannot set current limit of %s (%s)\n",
-			       cable->charger->regulator_name, cable->name);
+			pr_err("Cannot set current limit of %s (%d)\n",
+			       cable->charger->regulator_name, cable->id);
 			return;
 		}
 
@@ -1207,11 +1207,18 @@ static int charger_extcon_init(struct charger_manager *cm,
 	 */
 	INIT_WORK(&cable->wq, charger_extcon_work);
 	cable->nb.notifier_call = charger_extcon_notifier;
-	ret = extcon_register_interest(&cable->extcon_dev,
-			cable->extcon_name, cable->name, &cable->nb);
+
+	cable->extcon_dev = extcon_get_extcon_dev(cable->extcon_name);
+	if (IS_ERR(cable->extcon_dev)) {
+		pr_err("Cannot get extcon_dev for %s\n", cable->extcon_name);
+		return PTR_ERR(cable->extcon_dev);
+	}
+
+	ret = extcon_register_notifier(cable->extcon_dev, cable->id,
+			&cable->nb);
 	if (ret < 0) {
-		pr_info("Cannot register extcon_dev for %s(cable: %s)\n",
-			cable->extcon_name, cable->name);
+		pr_info("Cannot register extcon_dev for %s(cable: %d)\n",
+			cable->extcon_name, cable->id);
 		ret = -EINVAL;
 	}
 
@@ -1589,8 +1596,8 @@ static struct charger_desc *of_cm_parse_desc(struct device *dev)
 				chg_regs->cables = cables;
 
 				for_each_child_of_node(child, _child) {
-					of_property_read_string(_child,
-					"cm-cable-name", &cables->name);
+					of_property_read_u32(_child,
+					"cm-cable-id", &cables->id);
 					of_property_read_string(_child,
 					"cm-cable-extcon",
 					&cables->extcon_name);
@@ -1833,8 +1840,9 @@ err_reg_extcon:
 		for (j = 0; j < charger->num_cables; j++) {
 			struct charger_cable *cable = &charger->cables[j];
 			/* Remove notifier block if only edev exists */
-			if (cable->extcon_dev.edev)
-				extcon_unregister_interest(&cable->extcon_dev);
+			if (cable->extcon_dev)
+				extcon_unregister_notifier(cable->extcon_dev,
+						cable->id, &cable->nb);
 		}
 
 		regulator_put(desc->charger_regulators[i].consumer);
@@ -1865,7 +1873,8 @@ static int charger_manager_remove(struct platform_device *pdev)
 				= &desc->charger_regulators[i];
 		for (j = 0 ; j < charger->num_cables ; j++) {
 			struct charger_cable *cable = &charger->cables[j];
-			extcon_unregister_interest(&cable->extcon_dev);
+			extcon_unregister_notifier(cable->extcon_dev,
+						cable->id, &cable->nb);
 		}
 	}
 
diff --git a/include/linux/power/charger-manager.h b/include/linux/power/charger-manager.h
index c4fa907c8f14..b3404bb825d6 100644
--- a/include/linux/power/charger-manager.h
+++ b/include/linux/power/charger-manager.h
@@ -63,10 +63,10 @@ enum cm_event_types {
  */
 struct charger_cable {
 	const char *extcon_name;
-	const char *name;
+	unsigned int id;
 
 	/* The charger-manager use Extcon framework */
-	struct extcon_specific_cable_nb extcon_dev;
+	struct extcon_dev *extcon_dev;
 	struct work_struct wq;
 	struct notifier_block nb;
 
-- 
1.9.1

[PATCH v2 2/3] power: axp288_charger: Replace deprecatd API of extcon

[Chanwoo Choi]

This patch removes the deprecated notifier API of extcon framework and then use
the new extcon API[2] with the unique id[1] to indicate the each external
connector. Alter deprecated API as following:
- extcon_register_interest() -> extcon_register_notifier()
- extcon_unregister_interest() -> extcon_unregister_notifier()
- extcon_get_cable_state() -> extcon_get_cable_state_()

And, extcon alters the name of USB charger connector in patch[3] as following:
- EXTCON_CHG_USB_SDP /* Standard Downstream Port */
- EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
- EXTCON_CHG_USB_CDP /* Charging Downstream Port */
- EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */

[1] Commit 2a9de9c0f08d61
- ("extcon: Use the unique id for external connector instead of string)
[2] Commit 046050f6e623e4
- ("extcon: Update the prototype of extcon_register_notifier() with enum extcon
[3] Commit 11eecf910bd81d
- ("extcon: Modify the id and name of external connector")

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 drivers/power/axp288_charger.c | 77 +++++++++++++++++++++++++++++-------------
 1 file changed, 53 insertions(+), 24 deletions(-)

diff --git a/drivers/power/axp288_charger.c b/drivers/power/axp288_charger.c
index e4d569f57acc..4030eeb7cf65 100644
--- a/drivers/power/axp288_charger.c
+++ b/drivers/power/axp288_charger.c
@@ -129,10 +129,6 @@
 
 #define AXP288_EXTCON_DEV_NAME		"axp288_extcon"
 
-#define AXP288_EXTCON_SLOW_CHARGER		"SLOW-CHARGER"
-#define AXP288_EXTCON_DOWNSTREAM_CHARGER	"CHARGE-DOWNSTREAM"
-#define AXP288_EXTCON_FAST_CHARGER		"FAST-CHARGER"
-
 enum {
 	VBUS_OV_IRQ = 0,
 	CHARGE_DONE_IRQ,
@@ -158,7 +154,7 @@ struct axp288_chrg_info {
 	/* OTG/Host mode */
 	struct {
 		struct work_struct work;
-		struct extcon_specific_cable_nb cable;
+		struct extcon_dev *cable;
 		struct notifier_block id_nb;
 		bool id_short;
 	} otg;
@@ -586,17 +582,15 @@ static void axp288_charger_extcon_evt_worker(struct work_struct *work)
 	bool old_connected = info->cable.connected;
 
 	/* Determine cable/charger type */
-	if (extcon_get_cable_state(edev, AXP288_EXTCON_SLOW_CHARGER) > 0) {
+	if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_SDP) > 0) {
 		dev_dbg(&info->pdev->dev, "USB SDP charger  is connected");
 		info->cable.connected = true;
 		info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
-	} else if (extcon_get_cable_state(edev,
-				AXP288_EXTCON_DOWNSTREAM_CHARGER) > 0) {
+	} else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_CDP) > 0) {
 		dev_dbg(&info->pdev->dev, "USB CDP charger is connected");
 		info->cable.connected = true;
 		info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP;
-	} else if (extcon_get_cable_state(edev,
-					AXP288_EXTCON_FAST_CHARGER) > 0) {
+	} else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_DCP) > 0) {
 		dev_dbg(&info->pdev->dev, "USB DCP charger is connected");
 		info->cable.connected = true;
 		info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP;
@@ -692,8 +686,8 @@ static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
 {
 	struct axp288_chrg_info *info =
 	    container_of(nb, struct axp288_chrg_info, otg.id_nb);
-	struct extcon_dev *edev = param;
-	int usb_host = extcon_get_cable_state(edev, "USB-Host");
+	struct extcon_dev *edev = info->otg.cable;
+	int usb_host = extcon_get_cable_state_(edev, EXTCON_USB_HOST);
 
 	dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
 				usb_host ? "attached" : "detached");
@@ -848,10 +842,33 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	/* Register for extcon notification */
 	INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
 	info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;
-	ret = extcon_register_notifier(info->cable.edev, EXTCON_NONE, &info->cable.nb);
+	ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_SDP,
+					&info->cable.nb);
+	if (ret) {
+		dev_err(&info->pdev->dev,
+			"failed to register extcon notifier for SDP %d\n", ret);
+		return ret;
+	}
+
+	ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_CDP,
+					&info->cable.nb);
+	if (ret) {
+		dev_err(&info->pdev->dev,
+			"failed to register extcon notifier for CDP %d\n", ret);
+		extcon_unregister_notifier(info->cable.edev,
+				EXTCON_CHG_USB_SDP, &info->cable.nb);
+		return ret;
+	}
+
+	ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_DCP,
+					&info->cable.nb);
 	if (ret) {
 		dev_err(&info->pdev->dev,
-			"failed to register extcon notifier %d\n", ret);
+			"failed to register extcon notifier for DCP %d\n", ret);
+		extcon_unregister_notifier(info->cable.edev,
+				EXTCON_CHG_USB_SDP, &info->cable.nb);
+		extcon_unregister_notifier(info->cable.edev,
+				EXTCON_CHG_USB_CDP, &info->cable.nb);
 		return ret;
 	}
 
@@ -871,14 +888,14 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	/* Register for OTG notification */
 	INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
 	info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
-	ret = extcon_register_interest(&info->otg.cable, NULL, "USB-Host",
+	ret = extcon_register_notifier(info->otg.cable, EXTCON_USB_HOST,
 				       &info->otg.id_nb);
 	if (ret)
 		dev_warn(&pdev->dev, "failed to register otg notifier\n");
 
-	if (info->otg.cable.edev)
-		info->otg.id_short = extcon_get_cable_state(
-					info->otg.cable.edev, "USB-Host");
+	if (info->otg.cable)
+		info->otg.id_short = extcon_get_cable_state_(
+					info->otg.cable, EXTCON_USB_HOST);
 
 	/* Register charger interrupts */
 	for (i = 0; i < CHRG_INTR_END; i++) {
@@ -905,11 +922,17 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	return 0;
 
 intr_reg_failed:
-	if (info->otg.cable.edev)
-		extcon_unregister_interest(&info->otg.cable);
+	if (info->otg.cable)
+		extcon_unregister_notifier(info->otg.cable, EXTCON_USB_HOST,
+					&info->otg.id_nb);
 	power_supply_unregister(info->psy_usb);
 psy_reg_failed:
-	extcon_unregister_notifier(info->cable.edev, EXTCON_NONE, &info->cable.nb);
+	extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_SDP,
+					&info->cable.nb);
+	extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_CDP,
+					&info->cable.nb);
+	extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_DCP,
+					&info->cable.nb);
 	return ret;
 }
 
@@ -917,10 +940,16 @@ static int axp288_charger_remove(struct platform_device *pdev)
 {
 	struct axp288_chrg_info *info =  dev_get_drvdata(&pdev->dev);
 
-	if (info->otg.cable.edev)
-		extcon_unregister_interest(&info->otg.cable);
+	if (info->otg.cable)
+		extcon_unregister_notifier(info->otg.cable, EXTCON_USB_HOST,
+					&info->otg.id_nb);
 
-	extcon_unregister_notifier(info->cable.edev, EXTCON_NONE, &info->cable.nb);
+	extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_SDP,
+					&info->cable.nb);
+	extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_CDP,
+					&info->cable.nb);
+	extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_DCP,
+					&info->cable.nb);
 	power_supply_unregister(info->psy_usb);
 
 	return 0;
-- 
1.9.1

[PATCH v2 3/3] extcon: Remove the deprecated extcon functions

[Chanwoo Choi]

This patch removes the deprecated extcon functions using string type
to identify the type of external connector. The Commit 2a9de9c0f08d61
("extcon: Use the unique id for external connector instead of string)
uses the unique id to separate the type of external connector instead of
string name.
- extcon_register_interest()
- extcon_unregister_interest()
- extcon_set_cable_state()
- extcon_get_cable_state()

And, extcon_register_interest() finds the first extcon device to include the
requested external connector from extcon client device and then register the
notifier if extcon device argument is NULL. Instead, extcon_register_notifier()
supports this feature.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 drivers/extcon/extcon.c | 201 ++++++------------------------------------------
 include/linux/extcon.h  |  59 --------------
 2 files changed, 24 insertions(+), 236 deletions(-)

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 21a123cadf78..4fef9ab4b148 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -127,38 +127,6 @@ static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id
 	return -EINVAL;
 }
 
-static int find_cable_id_by_name(struct extcon_dev *edev, const char *name)
-{
-	int id = -EINVAL;
-	int i = 0;
-
-	/* Find the id of extcon cable */
-	while (extcon_name[i]) {
-		if (!strncmp(extcon_name[i], name, CABLE_NAME_MAX)) {
-			id = i;
-			break;
-		}
-		i++;
-	}
-
-	return id;
-}
-
-static int find_cable_index_by_name(struct extcon_dev *edev, const char *name)
-{
-	int id;
-
-	if (edev->max_supported == 0)
-		return -EINVAL;
-
-	/* Find the the number of extcon cable */
-	id = find_cable_id_by_name(edev, name);
-	if (id < 0)
-		return id;
-
-	return find_cable_index_by_id(edev, id);
-}
-
 static bool is_extcon_changed(u32 prev, u32 new, int idx, bool *attached)
 {
 	if (((prev >> idx) & 0x1) != ((new >> idx) & 0x1)) {
@@ -374,25 +342,6 @@ int extcon_get_cable_state_(struct extcon_dev *edev, const unsigned int id)
 EXPORT_SYMBOL_GPL(extcon_get_cable_state_);
 
 /**
- * extcon_get_cable_state() - Get the status of a specific cable.
- * @edev:	the extcon device that has the cable.
- * @cable_name:	cable name.
- *
- * Note that this is slower than extcon_get_cable_state_.
- */
-int extcon_get_cable_state(struct extcon_dev *edev, const char *cable_name)
-{
-	int id;
-
-	id = find_cable_id_by_name(edev, cable_name);
-	if (id < 0)
-		return id;
-
-	return extcon_get_cable_state_(edev, id);
-}
-EXPORT_SYMBOL_GPL(extcon_get_cable_state);
-
-/**
  * extcon_set_cable_state_() - Set the status of a specific cable.
  * @edev:		the extcon device that has the cable.
  * @id:			the unique id of each external connector
@@ -422,28 +371,6 @@ int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
 EXPORT_SYMBOL_GPL(extcon_set_cable_state_);
 
 /**
- * extcon_set_cable_state() - Set the status of a specific cable.
- * @edev:		the extcon device that has the cable.
- * @cable_name:		cable name.
- * @cable_state:	the new cable status. The default semantics is
- *			true: attached / false: detached.
- *
- * Note that this is slower than extcon_set_cable_state_.
- */
-int extcon_set_cable_state(struct extcon_dev *edev,
-			const char *cable_name, bool cable_state)
-{
-	int id;
-
-	id = find_cable_id_by_name(edev, cable_name);
-	if (id < 0)
-		return id;
-
-	return extcon_set_cable_state_(edev, id, cable_state);
-}
-EXPORT_SYMBOL_GPL(extcon_set_cable_state);
-
-/**
  * extcon_get_extcon_dev() - Get the extcon device instance from the name
  * @extcon_name:	The extcon name provided with extcon_dev_register()
  */
@@ -467,105 +394,6 @@ out:
 EXPORT_SYMBOL_GPL(extcon_get_extcon_dev);
 
 /**
- * extcon_register_interest() - Register a notifier for a state change of a
- *				specific cable, not an entier set of cables of a
- *				extcon device.
- * @obj:		an empty extcon_specific_cable_nb object to be returned.
- * @extcon_name:	the name of extcon device.
- *			if NULL, extcon_register_interest will register
- *			every cable with the target cable_name given.
- * @cable_name:		the target cable name.
- * @nb:			the notifier block to get notified.
- *
- * Provide an empty extcon_specific_cable_nb. extcon_register_interest() sets
- * the struct for you.
- *
- * extcon_register_interest is a helper function for those who want to get
- * notification for a single specific cable's status change. If a user wants
- * to get notification for any changes of all cables of a extcon device,
- * he/she should use the general extcon_register_notifier().
- *
- * Note that the second parameter given to the callback of nb (val) is
- * "old_state", not the current state. The current state can be retrieved
- * by looking at the third pameter (edev pointer)'s state value.
- */
-int extcon_register_interest(struct extcon_specific_cable_nb *obj,
-			     const char *extcon_name, const char *cable_name,
-			     struct notifier_block *nb)
-{
-	unsigned long flags;
-	int ret;
-
-	if (!obj || !cable_name || !nb)
-		return -EINVAL;
-
-	if (extcon_name) {
-		obj->edev = extcon_get_extcon_dev(extcon_name);
-		if (!obj->edev)
-			return -ENODEV;
-
-		obj->cable_index = find_cable_index_by_name(obj->edev,
-							cable_name);
-		if (obj->cable_index < 0)
-			return obj->cable_index;
-
-		obj->user_nb = nb;
-
-		spin_lock_irqsave(&obj->edev->lock, flags);
-		ret = raw_notifier_chain_register(
-					&obj->edev->nh[obj->cable_index],
-					obj->user_nb);
-		spin_unlock_irqrestore(&obj->edev->lock, flags);
-	} else {
-		struct class_dev_iter iter;
-		struct extcon_dev *extd;
-		struct device *dev;
-
-		if (!extcon_class)
-			return -ENODEV;
-		class_dev_iter_init(&iter, extcon_class, NULL, NULL);
-		while ((dev = class_dev_iter_next(&iter))) {
-			extd = dev_get_drvdata(dev);
-
-			if (find_cable_index_by_name(extd, cable_name) < 0)
-				continue;
-
-			class_dev_iter_exit(&iter);
-			return extcon_register_interest(obj, extd->name,
-						cable_name, nb);
-		}
-
-		ret = -ENODEV;
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(extcon_register_interest);
-
-/**
- * extcon_unregister_interest() - Unregister the notifier registered by
- *				  extcon_register_interest().
- * @obj:	the extcon_specific_cable_nb object returned by
- *		extcon_register_interest().
- */
-int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
-{
-	unsigned long flags;
-	int ret;
-
-	if (!obj)
-		return -EINVAL;
-
-	spin_lock_irqsave(&obj->edev->lock, flags);
-	ret = raw_notifier_chain_unregister(
-			&obj->edev->nh[obj->cable_index], obj->user_nb);
-	spin_unlock_irqrestore(&obj->edev->lock, flags);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(extcon_unregister_interest);
-
-/**
  * extcon_register_notifier() - Register a notifiee to get notified by
  *				any attach status changes from the extcon.
  * @edev:	the extcon device that has the external connecotr.
@@ -582,14 +410,33 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
 	unsigned long flags;
 	int ret, idx;
 
-	if (!edev || !nb)
+	if (!nb)
 		return -EINVAL;
 
-	idx = find_cable_index_by_id(edev, id);
+	if (edev) {
+		idx = find_cable_index_by_id(edev, id);
 
-	spin_lock_irqsave(&edev->lock, flags);
-	ret = raw_notifier_chain_register(&edev->nh[idx], nb);
-	spin_unlock_irqrestore(&edev->lock, flags);
+		spin_lock_irqsave(&edev->lock, flags);
+		ret = raw_notifier_chain_register(&edev->nh[idx], nb);
+		spin_unlock_irqrestore(&edev->lock, flags);
+	} else {
+		struct extcon_dev *extd;
+
+		mutex_lock(&extcon_dev_list_lock);
+		list_for_each_entry(extd, &extcon_dev_list, entry) {
+			idx = find_cable_index_by_id(extd, id);
+			if (idx >= 0)
+				break;
+		}
+		mutex_unlock(&extcon_dev_list_lock);
+
+		if (idx >= 0) {
+			edev = extd;
+			return extcon_register_notifier(extd, id, nb);
+		} else {
+			ret = -ENODEV;
+		}
+	}
 
 	return ret;
 }
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 7abf674c388c..dc7fc5dc9d6b 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -146,22 +146,6 @@ struct extcon_cable {
 	struct attribute *attrs[3]; /* to be fed to attr_g.attrs */
 };
 
-/**
- * struct extcon_specific_cable_nb - An internal data for
- *				     extcon_register_interest().
- * @user_nb:		user provided notifier block for events from
- *			a specific cable.
- * @cable_index:	the target cable.
- * @edev:		the target extcon device.
- * @previous_value:	the saved previous event value.
- */
-struct extcon_specific_cable_nb {
-	struct notifier_block *user_nb;
-	int cable_index;
-	struct extcon_dev *edev;
-	unsigned long previous_value;
-};
-
 #if IS_ENABLED(CONFIG_EXTCON)
 
 /*
@@ -207,23 +191,6 @@ extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id);
 extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
 				   bool cable_state);
 
-extern int extcon_get_cable_state(struct extcon_dev *edev,
-				  const char *cable_name);
-extern int extcon_set_cable_state(struct extcon_dev *edev,
-				  const char *cable_name, bool cable_state);
-
-/*
- * Following APIs are for notifiees (those who want to be notified)
- * to register a callback for events from a specific cable of the extcon.
- * Notifiees are the connected device drivers wanting to get notified by
- * a specific external port of a connection device.
- */
-extern int extcon_register_interest(struct extcon_specific_cable_nb *obj,
-				    const char *extcon_name,
-				    const char *cable_name,
-				    struct notifier_block *nb);
-extern int extcon_unregister_interest(struct extcon_specific_cable_nb *nb);
-
 /*
  * Following APIs are to monitor every action of a notifier.
  * Registrar gets notified for every external port of a connection device.
@@ -306,18 +273,6 @@ static inline int extcon_set_cable_state_(struct extcon_dev *edev,
 	return 0;
 }
 
-static inline int extcon_get_cable_state(struct extcon_dev *edev,
-			const char *cable_name)
-{
-	return 0;
-}
-
-static inline int extcon_set_cable_state(struct extcon_dev *edev,
-			const char *cable_name, int state)
-{
-	return 0;
-}
-
 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
 {
 	return NULL;
@@ -337,20 +292,6 @@ static inline int extcon_unregister_notifier(struct extcon_dev *edev,
 	return 0;
 }
 
-static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
-					   const char *extcon_name,
-					   const char *cable_name,
-					   struct notifier_block *nb)
-{
-	return 0;
-}
-
-static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
-						    *obj)
-{
-	return 0;
-}
-
 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
 							    int index)
 {
-- 
1.9.1

Re: [PATCH v2 0/3] power: Remove the deprecated extcon functions

[Chanwoo Choi]

Ping.

Could you review this patch?

Thanks,
Chanwoo Choi

On 2016년 04월 21일 18:55, Chanwoo Choi wrote:
> This patch-set removes the deprecated notifier API of extcon framework and
> then use the new extcon API[2] with the unique id[1] to indicate the each
> external connector. Alter deprecated API as following:
> - extcon_register_interest() -> extcon_register_notifier()
> - extcon_unregister_interest() -> extcon_unregister_notifier()
> - extcon_set_cable_state() -> extcon_set_cable_state_()
> - extcon_get_cable_state() -> extcon_get_cable_state_()
> 
> And, extcon alters the name of USB charger connector in patch[3] as following:
> - EXTCON_CHG_USB_SDP /* Standard Downstream Port */
> - EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
> - EXTCON_CHG_USB_CDP /* Charging Downstream Port */
> - EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */
> 
> [1] Commit 2a9de9c0f08d61
> - ("extcon: Use the unique id for external connector instead of string)
> [2] Commit 046050f6e623e4
> - ("extcon: Update the prototype of extcon_register_notifier() with enum extcon
> [3] Commit 11eecf910bd81d
> - ("extcon: Modify the id and name of external connector")
> 
> Changes from v1:
> - Fix the typo (EXTCON_CHG_USB_SDP -> EXTCON_CHG_USB_CDP) on axp288_charger.c
> 
> Chanwoo Choi (3):
>   power: charger-manager: Replace deprecatd API of extcon
>   power: axp288_charger: Replace deprecatd API of extcon
>   extcon: Remove the deprecated extcon functions
> 
>  .../bindings/power_supply/charger-manager.txt      |   4 +-
>  drivers/extcon/extcon.c                            | 201 +++------------------
>  drivers/power/axp288_charger.c                     |  77 +++++---
>  drivers/power/charger-manager.c                    |  31 ++--
>  include/linux/extcon.h                             |  59 ------
>  include/linux/power/charger-manager.h              |   4 +-
>  6 files changed, 101 insertions(+), 275 deletions(-)
> 

Re: [PATCH v2 0/3] power: Remove the deprecated extcon functions

[Rob Herring]

On Tue, May 10, 2016 at 09:54:58AM +0900, Chanwoo Choi wrote:
> Ping.
> 
> Could you review this patch?

I already did. The first problem is you are breaking compatibility here 
(a kernel with these changes won't work with a dtb without these 
changes). As I previously said, this binding in general is horribly 
designed and full on Linux driver specifics. The first clue is your 
driver changes are resulting in DT changes. If you are going to break 
compatibility here, it better be redoing this binding. The problems I 
see with this binding are:

- Linux device name strings
- "charger-manager" is not a chip or circuit. DT describes the h/w.
- Current limits by type of USB connection are pointless. These are part 
of the spec.
- Properties need standard unit suffixes.
- A mixture of battery and charger properties.

Rob

> 
> Thanks,
> Chanwoo Choi
> 
> On 2016년 04월 21일 18:55, Chanwoo Choi wrote:
> > This patch-set removes the deprecated notifier API of extcon framework and
> > then use the new extcon API[2] with the unique id[1] to indicate the each
> > external connector. Alter deprecated API as following:
> > - extcon_register_interest() -> extcon_register_notifier()
> > - extcon_unregister_interest() -> extcon_unregister_notifier()
> > - extcon_set_cable_state() -> extcon_set_cable_state_()
> > - extcon_get_cable_state() -> extcon_get_cable_state_()
> > 
> > And, extcon alters the name of USB charger connector in patch[3] as following:
> > - EXTCON_CHG_USB_SDP /* Standard Downstream Port */
> > - EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
> > - EXTCON_CHG_USB_CDP /* Charging Downstream Port */
> > - EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */
> > 
> > [1] Commit 2a9de9c0f08d61
> > - ("extcon: Use the unique id for external connector instead of string)
> > [2] Commit 046050f6e623e4
> > - ("extcon: Update the prototype of extcon_register_notifier() with enum extcon
> > [3] Commit 11eecf910bd81d
> > - ("extcon: Modify the id and name of external connector")
> > 
> > Changes from v1:
> > - Fix the typo (EXTCON_CHG_USB_SDP -> EXTCON_CHG_USB_CDP) on axp288_charger.c
> > 
> > Chanwoo Choi (3):
> >   power: charger-manager: Replace deprecatd API of extcon
> >   power: axp288_charger: Replace deprecatd API of extcon
> >   extcon: Remove the deprecated extcon functions
> > 
> >  .../bindings/power_supply/charger-manager.txt      |   4 +-
> >  drivers/extcon/extcon.c                            | 201 +++------------------
> >  drivers/power/axp288_charger.c                     |  77 +++++---
> >  drivers/power/charger-manager.c                    |  31 ++--
> >  include/linux/extcon.h                             |  59 ------
> >  include/linux/power/charger-manager.h              |   4 +-
> >  6 files changed, 101 insertions(+), 275 deletions(-)
> > 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH v2 0/3] power: Remove the deprecated extcon functions

[Chanwoo Choi]

Hi Rob,

On 2016년 05월 11일 22:47, Rob Herring wrote:
> On Tue, May 10, 2016 at 09:54:58AM +0900, Chanwoo Choi wrote:
>> Ping.
>>
>> Could you review this patch?
> 
> I already did. The first problem is you are breaking compatibility here 
> (a kernel with these changes won't work with a dtb without these 
> changes). As I previously said, this binding in general is horribly 
> designed and full on Linux driver specifics. The first clue is your 
> driver changes are resulting in DT changes. If you are going to break 
> compatibility here, it better be redoing this binding. The problems I 
> see with this binding are:
> 
> - Linux device name strings
> - "charger-manager" is not a chip or circuit. DT describes the h/w.
> - Current limits by type of USB connection are pointless. These are part 
> of the spec.
> - Properties need standard unit suffixes.
> - A mixture of battery and charger properties.

As I mentioned already on previous reply, I agree about your opinion absolutely.
The current charger-manager is not proper DT binding as you mentioned.

Just I want to remove the deprecated EXTCON API on charger-manager.
I don't have any thinking about improving the charger-manager driver.

As you mentioned, "charger-manager" is not a chip or circuit.
So, I think that new charging framework should be implemented
on power-supply framework with deleting charger-manager driver.
But, the update to change the "charger-manager" dt binding style
may be huge task. I think that we have to divide this task from removing
the deprecated EXTCON API.

Dear Sebastian,
If possible, I'd like to receive the opinion from you.

Regards,
Chanwoo Choi

> 
>>
>> Thanks,
>> Chanwoo Choi
>>
>> On 2016년 04월 21일 18:55, Chanwoo Choi wrote:
>>> This patch-set removes the deprecated notifier API of extcon framework and
>>> then use the new extcon API[2] with the unique id[1] to indicate the each
>>> external connector. Alter deprecated API as following:
>>> - extcon_register_interest() -> extcon_register_notifier()
>>> - extcon_unregister_interest() -> extcon_unregister_notifier()
>>> - extcon_set_cable_state() -> extcon_set_cable_state_()
>>> - extcon_get_cable_state() -> extcon_get_cable_state_()
>>>
>>> And, extcon alters the name of USB charger connector in patch[3] as following:
>>> - EXTCON_CHG_USB_SDP /* Standard Downstream Port */
>>> - EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
>>> - EXTCON_CHG_USB_CDP /* Charging Downstream Port */
>>> - EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */
>>>
>>> [1] Commit 2a9de9c0f08d61
>>> - ("extcon: Use the unique id for external connector instead of string)
>>> [2] Commit 046050f6e623e4
>>> - ("extcon: Update the prototype of extcon_register_notifier() with enum extcon
>>> [3] Commit 11eecf910bd81d
>>> - ("extcon: Modify the id and name of external connector")
>>>
>>> Changes from v1:
>>> - Fix the typo (EXTCON_CHG_USB_SDP -> EXTCON_CHG_USB_CDP) on axp288_charger.c
>>>
>>> Chanwoo Choi (3):
>>>   power: charger-manager: Replace deprecatd API of extcon
>>>   power: axp288_charger: Replace deprecatd API of extcon
>>>   extcon: Remove the deprecated extcon functions
>>>
>>>  .../bindings/power_supply/charger-manager.txt      |   4 +-
>>>  drivers/extcon/extcon.c                            | 201 +++------------------
>>>  drivers/power/axp288_charger.c                     |  77 +++++---
>>>  drivers/power/charger-manager.c                    |  31 ++--
>>>  include/linux/extcon.h                             |  59 ------
>>>  include/linux/power/charger-manager.h              |   4 +-
>>>  6 files changed, 101 insertions(+), 275 deletions(-)
>>>
>>
>> --
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>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
>