[PATCH v5 1/8] extcon: max8997: Add CHGINS and CHGRM interrupt handling

[PATCH v5 1/8] extcon: max8997: Add CHGINS and CHGRM interrupt handling

[Timon Baetz]

This allows the MAX8997 charger to set the current limit depending on
the detected extcon charger type.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 drivers/extcon/extcon-max8997.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 337b0eea4e62..e1408075ef7d 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -44,6 +44,8 @@ static struct max8997_muic_irq muic_irqs[] = {
 	{ MAX8997_MUICIRQ_ChgDetRun,	"muic-CHGDETRUN" },
 	{ MAX8997_MUICIRQ_ChgTyp,	"muic-CHGTYP" },
 	{ MAX8997_MUICIRQ_OVP,		"muic-OVP" },
+	{ MAX8997_PMICIRQ_CHGINS,	"pmic-CHGINS" },
+	{ MAX8997_PMICIRQ_CHGRM,	"pmic-CHGRM" },
 };
 
 /* Define supported cable type */
@@ -538,6 +540,8 @@ static void max8997_muic_irq_work(struct work_struct *work)
 	case MAX8997_MUICIRQ_DCDTmr:
 	case MAX8997_MUICIRQ_ChgDetRun:
 	case MAX8997_MUICIRQ_ChgTyp:
+	case MAX8997_PMICIRQ_CHGINS:
+	case MAX8997_PMICIRQ_CHGRM:
 		/* Handle charger cable */
 		ret = max8997_muic_chg_handler(info);
 		break;
-- 
2.25.1

[PATCH v5 1/8] extcon: max8997: Add CHGINS and CHGRM interrupt handling

[Timon Baetz]

This allows the MAX8997 charger to set the current limit depending on
the detected extcon charger type.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 drivers/extcon/extcon-max8997.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 337b0eea4e62..e1408075ef7d 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -44,6 +44,8 @@ static struct max8997_muic_irq muic_irqs[] = {
 	{ MAX8997_MUICIRQ_ChgDetRun,	"muic-CHGDETRUN" },
 	{ MAX8997_MUICIRQ_ChgTyp,	"muic-CHGTYP" },
 	{ MAX8997_MUICIRQ_OVP,		"muic-OVP" },
+	{ MAX8997_PMICIRQ_CHGINS,	"pmic-CHGINS" },
+	{ MAX8997_PMICIRQ_CHGRM,	"pmic-CHGRM" },
 };
 
 /* Define supported cable type */
@@ -538,6 +540,8 @@ static void max8997_muic_irq_work(struct work_struct *work)
 	case MAX8997_MUICIRQ_DCDTmr:
 	case MAX8997_MUICIRQ_ChgDetRun:
 	case MAX8997_MUICIRQ_ChgTyp:
+	case MAX8997_PMICIRQ_CHGINS:
+	case MAX8997_PMICIRQ_CHGRM:
 		/* Handle charger cable */
 		ret = max8997_muic_chg_handler(info);
 		break;
-- 
2.25.1



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[PATCH v5 2/8] regulator: dt-bindings: Document max8997-pmic nodes

[Timon Baetz]

Add maxim,max8997-battery and maxim,max8997-muic optional nodes.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 .../bindings/regulator/max8997-regulator.txt         | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/max8997-regulator.txt b/Documentation/devicetree/bindings/regulator/max8997-regulator.txt
index 6fe825b8ac1b..faaf2bbf0272 100644
--- a/Documentation/devicetree/bindings/regulator/max8997-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/max8997-regulator.txt
@@ -53,6 +53,18 @@ Additional properties required if either of the optional properties are used:
 - max8997,pmic-buck125-dvs-gpios: GPIO specifiers for three host gpio's used
   for dvs. The format of the gpio specifier depends in the gpio controller.
 
+Optional nodes:
+- charger: Node for configuring the charger driver.
+  Required properties:
+  - compatible: "maxim,max8997-battery"
+  Optional properties:
+  - extcon: extcon specifier for charging events
+  - charger-supply: regulator node for charging current
+
+- muic: Node used only by extcon consumers.
+  Required properties:
+  - compatible: "maxim,max8997-muic"
+
 Regulators: The regulators of max8997 that have to be instantiated should be
 included in a sub-node named 'regulators'. Regulator nodes included in this
 sub-node should be of the format as listed below.
-- 
2.25.1

[PATCH v5 2/8] regulator: dt-bindings: Document max8997-pmic nodes

[Timon Baetz]

Add maxim,max8997-battery and maxim,max8997-muic optional nodes.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 .../bindings/regulator/max8997-regulator.txt         | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/max8997-regulator.txt b/Documentation/devicetree/bindings/regulator/max8997-regulator.txt
index 6fe825b8ac1b..faaf2bbf0272 100644
--- a/Documentation/devicetree/bindings/regulator/max8997-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/max8997-regulator.txt
@@ -53,6 +53,18 @@ Additional properties required if either of the optional properties are used:
 - max8997,pmic-buck125-dvs-gpios: GPIO specifiers for three host gpio's used
   for dvs. The format of the gpio specifier depends in the gpio controller.
 
+Optional nodes:
+- charger: Node for configuring the charger driver.
+  Required properties:
+  - compatible: "maxim,max8997-battery"
+  Optional properties:
+  - extcon: extcon specifier for charging events
+  - charger-supply: regulator node for charging current
+
+- muic: Node used only by extcon consumers.
+  Required properties:
+  - compatible: "maxim,max8997-muic"
+
 Regulators: The regulators of max8997 that have to be instantiated should be
 included in a sub-node named 'regulators'. Regulator nodes included in this
 sub-node should be of the format as listed below.
-- 
2.25.1



_______________________________________________
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[PATCH v5 3/8] power: supply: max8997_charger: Set CHARGER current limit

[Timon Baetz]

Register for extcon notification and set charging current depending on
the detected cable type. Current values are taken from vendor kernel,
where most charger types end up setting 650mA [0].

Also enable and disable the CHARGER regulator based on extcon events.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/misc/max8997-muic.c#L1675-L1678

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 drivers/power/supply/max8997_charger.c | 96 ++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/drivers/power/supply/max8997_charger.c b/drivers/power/supply/max8997_charger.c
index 1947af25879a..f0f725385dfc 100644
--- a/drivers/power/supply/max8997_charger.c
+++ b/drivers/power/supply/max8997_charger.c
@@ -6,12 +6,14 @@
 //  MyungJoo Ham <myungjoo.ham@samsung.com>
 
 #include <linux/err.h>
+#include <linux/extcon.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/mfd/max8997.h>
 #include <linux/mfd/max8997-private.h>
+#include <linux/regulator/consumer.h>
 
 /* MAX8997_REG_STATUS4 */
 #define DCINOK_SHIFT		1
@@ -31,6 +33,10 @@ struct charger_data {
 	struct device *dev;
 	struct max8997_dev *iodev;
 	struct power_supply *battery;
+	struct regulator *reg;
+	struct extcon_dev *edev;
+	struct notifier_block extcon_nb;
+	struct work_struct extcon_work;
 };
 
 static enum power_supply_property max8997_battery_props[] = {
@@ -88,6 +94,67 @@ static int max8997_battery_get_property(struct power_supply *psy,
 	return 0;
 }
 
+static void max8997_battery_extcon_evt_stop_work(void *data)
+{
+	struct charger_data *charger = data;
+
+	cancel_work_sync(&charger->extcon_work);
+}
+
+static void max8997_battery_extcon_evt_worker(struct work_struct *work)
+{
+	struct charger_data *charger =
+	    container_of(work, struct charger_data, extcon_work);
+	struct extcon_dev *edev = charger->edev;
+	int current_limit;
+
+	if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
+		dev_dbg(charger->dev, "USB SDP charger is connected\n");
+		current_limit = 450000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
+		dev_dbg(charger->dev, "USB DCP charger is connected\n");
+		current_limit = 650000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) {
+		dev_dbg(charger->dev, "USB FAST charger is connected\n");
+		current_limit = 650000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) {
+		dev_dbg(charger->dev, "USB SLOW charger is connected\n");
+		current_limit = 650000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
+		dev_dbg(charger->dev, "USB CDP charger is connected\n");
+		current_limit = 650000;
+	} else {
+		dev_dbg(charger->dev, "USB charger is diconnected\n");
+		current_limit = -1;
+	}
+
+	if (current_limit > 0) {
+		int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit);
+
+		if (ret) {
+			dev_err(charger->dev, "failed to set current limit: %d\n", ret);
+			return;
+		}
+		ret = regulator_enable(charger->reg);
+		if (ret)
+			dev_err(charger->dev, "failed to enable regulator: %d\n", ret);
+	} else {
+		int ret  = regulator_disable(charger->reg);
+
+		if (ret)
+			dev_err(charger->dev, "failed to disable regulator: %d\n", ret);
+	}
+}
+
+static int max8997_battery_extcon_evt(struct notifier_block *nb,
+				unsigned long event, void *param)
+{
+	struct charger_data *charger =
+		container_of(nb, struct charger_data, extcon_nb);
+	schedule_work(&charger->extcon_work);
+	return NOTIFY_OK;
+}
+
 static const struct power_supply_desc max8997_battery_desc = {
 	.name		= "max8997_pmic",
 	.type		= POWER_SUPPLY_TYPE_BATTERY,
@@ -170,6 +237,35 @@ static int max8997_battery_probe(struct platform_device *pdev)
 		return PTR_ERR(charger->battery);
 	}
 
+	charger->reg = devm_regulator_get_optional(&pdev->dev, "charger");
+	if (IS_ERR(charger->reg)) {
+		if (PTR_ERR(charger->reg) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "couldn't get charger regulator\n");
+	}
+	charger->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
+	if (IS_ERR(charger->edev)) {
+		if (PTR_ERR(charger->edev) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(charger->dev, "couldn't get extcon device\n");
+	}
+
+	if (!IS_ERR(charger->reg) && !IS_ERR(charger->edev)) {
+		INIT_WORK(&charger->extcon_work, max8997_battery_extcon_evt_worker);
+		ret = devm_add_action(&pdev->dev, max8997_battery_extcon_evt_stop_work, charger);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to add extcon evt stop action: %d\n", ret);
+			return ret;
+		}
+		charger->extcon_nb.notifier_call = max8997_battery_extcon_evt;
+		ret = devm_extcon_register_notifier_all(&pdev->dev, charger->edev,
+							&charger->extcon_nb);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to register extcon notifier\n");
+			return ret;
+		};
+	}
+
 	return 0;
 }
 
-- 
2.25.1

[PATCH v5 3/8] power: supply: max8997_charger: Set CHARGER current limit

[Timon Baetz]

Register for extcon notification and set charging current depending on
the detected cable type. Current values are taken from vendor kernel,
where most charger types end up setting 650mA [0].

Also enable and disable the CHARGER regulator based on extcon events.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/misc/max8997-muic.c#L1675-L1678

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 drivers/power/supply/max8997_charger.c | 96 ++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/drivers/power/supply/max8997_charger.c b/drivers/power/supply/max8997_charger.c
index 1947af25879a..f0f725385dfc 100644
--- a/drivers/power/supply/max8997_charger.c
+++ b/drivers/power/supply/max8997_charger.c
@@ -6,12 +6,14 @@
 //  MyungJoo Ham <myungjoo.ham@samsung.com>
 
 #include <linux/err.h>
+#include <linux/extcon.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/mfd/max8997.h>
 #include <linux/mfd/max8997-private.h>
+#include <linux/regulator/consumer.h>
 
 /* MAX8997_REG_STATUS4 */
 #define DCINOK_SHIFT		1
@@ -31,6 +33,10 @@ struct charger_data {
 	struct device *dev;
 	struct max8997_dev *iodev;
 	struct power_supply *battery;
+	struct regulator *reg;
+	struct extcon_dev *edev;
+	struct notifier_block extcon_nb;
+	struct work_struct extcon_work;
 };
 
 static enum power_supply_property max8997_battery_props[] = {
@@ -88,6 +94,67 @@ static int max8997_battery_get_property(struct power_supply *psy,
 	return 0;
 }
 
+static void max8997_battery_extcon_evt_stop_work(void *data)
+{
+	struct charger_data *charger = data;
+
+	cancel_work_sync(&charger->extcon_work);
+}
+
+static void max8997_battery_extcon_evt_worker(struct work_struct *work)
+{
+	struct charger_data *charger =
+	    container_of(work, struct charger_data, extcon_work);
+	struct extcon_dev *edev = charger->edev;
+	int current_limit;
+
+	if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
+		dev_dbg(charger->dev, "USB SDP charger is connected\n");
+		current_limit = 450000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
+		dev_dbg(charger->dev, "USB DCP charger is connected\n");
+		current_limit = 650000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) {
+		dev_dbg(charger->dev, "USB FAST charger is connected\n");
+		current_limit = 650000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) {
+		dev_dbg(charger->dev, "USB SLOW charger is connected\n");
+		current_limit = 650000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
+		dev_dbg(charger->dev, "USB CDP charger is connected\n");
+		current_limit = 650000;
+	} else {
+		dev_dbg(charger->dev, "USB charger is diconnected\n");
+		current_limit = -1;
+	}
+
+	if (current_limit > 0) {
+		int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit);
+
+		if (ret) {
+			dev_err(charger->dev, "failed to set current limit: %d\n", ret);
+			return;
+		}
+		ret = regulator_enable(charger->reg);
+		if (ret)
+			dev_err(charger->dev, "failed to enable regulator: %d\n", ret);
+	} else {
+		int ret  = regulator_disable(charger->reg);
+
+		if (ret)
+			dev_err(charger->dev, "failed to disable regulator: %d\n", ret);
+	}
+}
+
+static int max8997_battery_extcon_evt(struct notifier_block *nb,
+				unsigned long event, void *param)
+{
+	struct charger_data *charger =
+		container_of(nb, struct charger_data, extcon_nb);
+	schedule_work(&charger->extcon_work);
+	return NOTIFY_OK;
+}
+
 static const struct power_supply_desc max8997_battery_desc = {
 	.name		= "max8997_pmic",
 	.type		= POWER_SUPPLY_TYPE_BATTERY,
@@ -170,6 +237,35 @@ static int max8997_battery_probe(struct platform_device *pdev)
 		return PTR_ERR(charger->battery);
 	}
 
+	charger->reg = devm_regulator_get_optional(&pdev->dev, "charger");
+	if (IS_ERR(charger->reg)) {
+		if (PTR_ERR(charger->reg) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(&pdev->dev, "couldn't get charger regulator\n");
+	}
+	charger->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
+	if (IS_ERR(charger->edev)) {
+		if (PTR_ERR(charger->edev) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(charger->dev, "couldn't get extcon device\n");
+	}
+
+	if (!IS_ERR(charger->reg) && !IS_ERR(charger->edev)) {
+		INIT_WORK(&charger->extcon_work, max8997_battery_extcon_evt_worker);
+		ret = devm_add_action(&pdev->dev, max8997_battery_extcon_evt_stop_work, charger);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to add extcon evt stop action: %d\n", ret);
+			return ret;
+		}
+		charger->extcon_nb.notifier_call = max8997_battery_extcon_evt;
+		ret = devm_extcon_register_notifier_all(&pdev->dev, charger->edev,
+							&charger->extcon_nb);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to register extcon notifier\n");
+			return ret;
+		};
+	}
+
 	return 0;
 }
 
-- 
2.25.1



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[PATCH v5 4/8] ARM: dts: exynos: Add muic and charger nodes for I9100

[Timon Baetz]

muic node is only used for extcon consumers.
charger node is used to point to muic and regulator.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-i9100.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index 5370ee477186..8fa704babd5e 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/exynos4210-i9100.dts
@@ -584,6 +584,16 @@ EN32KHZ_CP {
 				regulator-always-on;
 			};
 		};
+
+		muic: max8997-muic {
+			compatible = "maxim,max8997-muic";
+		};
+
+		charger {
+			compatible = "maxim,max8997-battery";
+			charger-supply = <&charger_reg>;
+			extcon = <&muic>;
+		};
 	};
 };
 
-- 
2.25.1

[PATCH v5 4/8] ARM: dts: exynos: Add muic and charger nodes for I9100

[Timon Baetz]

muic node is only used for extcon consumers.
charger node is used to point to muic and regulator.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-i9100.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index 5370ee477186..8fa704babd5e 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/exynos4210-i9100.dts
@@ -584,6 +584,16 @@ EN32KHZ_CP {
 				regulator-always-on;
 			};
 		};
+
+		muic: max8997-muic {
+			compatible = "maxim,max8997-muic";
+		};
+
+		charger {
+			compatible = "maxim,max8997-battery";
+			charger-supply = <&charger_reg>;
+			extcon = <&muic>;
+		};
 	};
 };
 
-- 
2.25.1



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[PATCH v5 5/8] ARM: dts: exynos: Add muic and charger nodes for Origen

[Timon Baetz]

Both nodes are disabled as there is no battery and pins are not
connected.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-origen.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-origen.dts b/arch/arm/boot/dts/exynos4210-origen.dts
index 7d2cfbafefb2..9792531ac3da 100644
--- a/arch/arm/boot/dts/exynos4210-origen.dts
+++ b/arch/arm/boot/dts/exynos4210-origen.dts
@@ -312,6 +312,16 @@ EN32KHZ_AP {
 				regulator-always-on;
 			};
 		};
+
+		muic {
+			compatible = "maxim,max8997-muic";
+			status = "disabled";
+		};
+
+		charger {
+			compatible = "maxim,max8997-battery";
+			status = "disabled";
+		};
 	};
 };
 
-- 
2.25.1

[PATCH v5 5/8] ARM: dts: exynos: Add muic and charger nodes for Origen

[Timon Baetz]

Both nodes are disabled as there is no battery and pins are not
connected.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-origen.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-origen.dts b/arch/arm/boot/dts/exynos4210-origen.dts
index 7d2cfbafefb2..9792531ac3da 100644
--- a/arch/arm/boot/dts/exynos4210-origen.dts
+++ b/arch/arm/boot/dts/exynos4210-origen.dts
@@ -312,6 +312,16 @@ EN32KHZ_AP {
 				regulator-always-on;
 			};
 		};
+
+		muic {
+			compatible = "maxim,max8997-muic";
+			status = "disabled";
+		};
+
+		charger {
+			compatible = "maxim,max8997-battery";
+			status = "disabled";
+		};
 	};
 };
 
-- 
2.25.1



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[PATCH v5 6/8] ARM: dts: exynos: Add muic and charger nodes for Trats

[Timon Baetz]

muic node is only used for extcon consumers.
charger node is used to point to muic.

Note: charging control is not working as we don't have a charger-supply.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-trats.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
index a226bec56a45..686465f0044b 100644
--- a/arch/arm/boot/dts/exynos4210-trats.dts
+++ b/arch/arm/boot/dts/exynos4210-trats.dts
@@ -459,6 +459,15 @@ EN32KHZ_CP {
 				regulator-always-on;
 			};
 		};
+
+		muic: max8997-muic {
+			compatible = "maxim,max8997-muic";
+		};
+
+		charger {
+			compatible = "maxim,max8997-battery";
+			extcon = <&muic>;
+		};
 	};
 };
 
-- 
2.25.1

[PATCH v5 6/8] ARM: dts: exynos: Add muic and charger nodes for Trats

[Timon Baetz]

muic node is only used for extcon consumers.
charger node is used to point to muic.

Note: charging control is not working as we don't have a charger-supply.

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-trats.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
index a226bec56a45..686465f0044b 100644
--- a/arch/arm/boot/dts/exynos4210-trats.dts
+++ b/arch/arm/boot/dts/exynos4210-trats.dts
@@ -459,6 +459,15 @@ EN32KHZ_CP {
 				regulator-always-on;
 			};
 		};
+
+		muic: max8997-muic {
+			compatible = "maxim,max8997-muic";
+		};
+
+		charger {
+			compatible = "maxim,max8997-battery";
+			extcon = <&muic>;
+		};
 	};
 };
 
-- 
2.25.1



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[PATCH v5 7/8] ARM: dts: exynos: Fix charging regulator voltage and current for I9100

[Timon Baetz]

Set CHARGER current and CHARGER_CV voltage according to Galaxy S2 Epic
4G Touch SPH-D710 Android vendor sources [0,1].

Remove regulator-always-on. The regulator can be enabled and disabled
based on extcon events.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/max8997_charger_u1.c#L169-L170
[1] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/max8997_charger_u1.c#L390-L391

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-i9100.dts | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index 8fa704babd5e..586d801af0b5 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/exynos4210-i9100.dts
@@ -562,15 +562,14 @@ safe2_sreg: ESAFEOUT2 {
 
 			charger_reg: CHARGER {
 				regulator-name = "CHARGER";
-				regulator-min-microamp = <60000>;
-				regulator-max-microamp = <2580000>;
-				regulator-always-on;
+				regulator-min-microamp = <200000>;
+				regulator-max-microamp = <950000>;
 			};
 
 			chargercv_reg: CHARGER_CV {
 				regulator-name = "CHARGER_CV";
-				regulator-min-microvolt = <3800000>;
-				regulator-max-microvolt = <4100000>;
+				regulator-min-microvolt = <4200000>;
+				regulator-max-microvolt = <4200000>;
 				regulator-always-on;
 			};
 
-- 
2.25.1

[PATCH v5 7/8] ARM: dts: exynos: Fix charging regulator voltage and current for I9100

[Timon Baetz]

Set CHARGER current and CHARGER_CV voltage according to Galaxy S2 Epic
4G Touch SPH-D710 Android vendor sources [0,1].

Remove regulator-always-on. The regulator can be enabled and disabled
based on extcon events.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/max8997_charger_u1.c#L169-L170
[1] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/max8997_charger_u1.c#L390-L391

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-i9100.dts | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index 8fa704babd5e..586d801af0b5 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/exynos4210-i9100.dts
@@ -562,15 +562,14 @@ safe2_sreg: ESAFEOUT2 {
 
 			charger_reg: CHARGER {
 				regulator-name = "CHARGER";
-				regulator-min-microamp = <60000>;
-				regulator-max-microamp = <2580000>;
-				regulator-always-on;
+				regulator-min-microamp = <200000>;
+				regulator-max-microamp = <950000>;
 			};
 
 			chargercv_reg: CHARGER_CV {
 				regulator-name = "CHARGER_CV";
-				regulator-min-microvolt = <3800000>;
-				regulator-max-microvolt = <4100000>;
+				regulator-min-microvolt = <4200000>;
+				regulator-max-microvolt = <4200000>;
 				regulator-always-on;
 			};
 
-- 
2.25.1



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[PATCH v5 8/8] ARM: dts: exynos: Add top-off charging regulator node for I9100

[Timon Baetz]

Value taken from Galaxy S2 Epic 4G Touch SPH-D710 Android vendor
kernel [0] which always sets 200mA.

Also rearrange regulators based on definition in max8997.h.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/sec_battery_u1.c#L1525

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-i9100.dts | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index 586d801af0b5..e702adb69670 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/exynos4210-i9100.dts
@@ -560,6 +560,16 @@ safe2_sreg: ESAFEOUT2 {
 				regulator-boot-on;
 			};
 
+			EN32KHZ_AP {
+				regulator-name = "EN32KHZ_AP";
+				regulator-always-on;
+			};
+
+			EN32KHZ_CP {
+				regulator-name = "EN32KHZ_CP";
+				regulator-always-on;
+			};
+
 			charger_reg: CHARGER {
 				regulator-name = "CHARGER";
 				regulator-min-microamp = <200000>;
@@ -573,13 +583,10 @@ chargercv_reg: CHARGER_CV {
 				regulator-always-on;
 			};
 
-			EN32KHZ_AP {
-				regulator-name = "EN32KHZ_AP";
-				regulator-always-on;
-			};
-
-			EN32KHZ_CP {
-				regulator-name = "EN32KHZ_CP";
+			CHARGER_TOPOFF {
+				regulator-name = "CHARGER_TOPOFF";
+				regulator-min-microamp = <200000>;
+				regulator-max-microamp = <200000>;
 				regulator-always-on;
 			};
 		};
-- 
2.25.1

[PATCH v5 8/8] ARM: dts: exynos: Add top-off charging regulator node for I9100

[Timon Baetz]

Value taken from Galaxy S2 Epic 4G Touch SPH-D710 Android vendor
kernel [0] which always sets 200mA.

Also rearrange regulators based on definition in max8997.h.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/sec_battery_u1.c#L1525

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
---
 arch/arm/boot/dts/exynos4210-i9100.dts | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index 586d801af0b5..e702adb69670 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/exynos4210-i9100.dts
@@ -560,6 +560,16 @@ safe2_sreg: ESAFEOUT2 {
 				regulator-boot-on;
 			};
 
+			EN32KHZ_AP {
+				regulator-name = "EN32KHZ_AP";
+				regulator-always-on;
+			};
+
+			EN32KHZ_CP {
+				regulator-name = "EN32KHZ_CP";
+				regulator-always-on;
+			};
+
 			charger_reg: CHARGER {
 				regulator-name = "CHARGER";
 				regulator-min-microamp = <200000>;
@@ -573,13 +583,10 @@ chargercv_reg: CHARGER_CV {
 				regulator-always-on;
 			};
 
-			EN32KHZ_AP {
-				regulator-name = "EN32KHZ_AP";
-				regulator-always-on;
-			};
-
-			EN32KHZ_CP {
-				regulator-name = "EN32KHZ_CP";
+			CHARGER_TOPOFF {
+				regulator-name = "CHARGER_TOPOFF";
+				regulator-min-microamp = <200000>;
+				regulator-max-microamp = <200000>;
 				regulator-always-on;
 			};
 		};
-- 
2.25.1



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Re: [PATCH v5 3/8] power: supply: max8997_charger: Set CHARGER current limit

[Krzysztof Kozlowski]

On Mon, Dec 28, 2020 at 11:36:02AM +0000, Timon Baetz wrote:
> Register for extcon notification and set charging current depending on
> the detected cable type. Current values are taken from vendor kernel,
> where most charger types end up setting 650mA [0].
> 
> Also enable and disable the CHARGER regulator based on extcon events.
> 
> [0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/misc/max8997-muic.c#L1675-L1678
> 
> Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
> ---
>  drivers/power/supply/max8997_charger.c | 96 ++++++++++++++++++++++++++
>  1 file changed, 96 insertions(+)
> 
> diff --git a/drivers/power/supply/max8997_charger.c b/drivers/power/supply/max8997_charger.c
> index 1947af25879a..f0f725385dfc 100644
> --- a/drivers/power/supply/max8997_charger.c
> +++ b/drivers/power/supply/max8997_charger.c
> @@ -6,12 +6,14 @@
>  //  MyungJoo Ham <myungjoo.ham@samsung.com>
>  
>  #include <linux/err.h>
> +#include <linux/extcon.h>
>  #include <linux/module.h>
>  #include <linux/slab.h>
>  #include <linux/platform_device.h>
>  #include <linux/power_supply.h>
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
> +#include <linux/regulator/consumer.h>
>  
>  /* MAX8997_REG_STATUS4 */
>  #define DCINOK_SHIFT		1
> @@ -31,6 +33,10 @@ struct charger_data {
>  	struct device *dev;
>  	struct max8997_dev *iodev;
>  	struct power_supply *battery;
> +	struct regulator *reg;
> +	struct extcon_dev *edev;
> +	struct notifier_block extcon_nb;
> +	struct work_struct extcon_work;
>  };
>  
>  static enum power_supply_property max8997_battery_props[] = {
> @@ -88,6 +94,67 @@ static int max8997_battery_get_property(struct power_supply *psy,
>  	return 0;
>  }
>  
> +static void max8997_battery_extcon_evt_stop_work(void *data)
> +{
> +	struct charger_data *charger = data;
> +
> +	cancel_work_sync(&charger->extcon_work);
> +}
> +
> +static void max8997_battery_extcon_evt_worker(struct work_struct *work)
> +{
> +	struct charger_data *charger =
> +	    container_of(work, struct charger_data, extcon_work);
> +	struct extcon_dev *edev = charger->edev;
> +	int current_limit;
> +
> +	if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
> +		dev_dbg(charger->dev, "USB SDP charger is connected\n");
> +		current_limit = 450000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
> +		dev_dbg(charger->dev, "USB DCP charger is connected\n");
> +		current_limit = 650000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) {
> +		dev_dbg(charger->dev, "USB FAST charger is connected\n");
> +		current_limit = 650000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) {
> +		dev_dbg(charger->dev, "USB SLOW charger is connected\n");
> +		current_limit = 650000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
> +		dev_dbg(charger->dev, "USB CDP charger is connected\n");
> +		current_limit = 650000;
> +	} else {
> +		dev_dbg(charger->dev, "USB charger is diconnected\n");
> +		current_limit = -1;
> +	}
> +
> +	if (current_limit > 0) {
> +		int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit);
> +
> +		if (ret) {
> +			dev_err(charger->dev, "failed to set current limit: %d\n", ret);
> +			return;
> +		}
> +		ret = regulator_enable(charger->reg);
> +		if (ret)
> +			dev_err(charger->dev, "failed to enable regulator: %d\n", ret);
> +	} else {
> +		int ret  = regulator_disable(charger->reg);
> +
> +		if (ret)
> +			dev_err(charger->dev, "failed to disable regulator: %d\n", ret);
> +	}
> +}
> +
> +static int max8997_battery_extcon_evt(struct notifier_block *nb,
> +				unsigned long event, void *param)
> +{
> +	struct charger_data *charger =
> +		container_of(nb, struct charger_data, extcon_nb);
> +	schedule_work(&charger->extcon_work);
> +	return NOTIFY_OK;
> +}
> +
>  static const struct power_supply_desc max8997_battery_desc = {
>  	.name		= "max8997_pmic",
>  	.type		= POWER_SUPPLY_TYPE_BATTERY,
> @@ -170,6 +237,35 @@ static int max8997_battery_probe(struct platform_device *pdev)
>  		return PTR_ERR(charger->battery);
>  	}
>  
> +	charger->reg = devm_regulator_get_optional(&pdev->dev, "charger");
> +	if (IS_ERR(charger->reg)) {
> +		if (PTR_ERR(charger->reg) == -EPROBE_DEFER)
> +			return -EPROBE_DEFER;
> +		dev_err(&pdev->dev, "couldn't get charger regulator\n");

This should be dev_info, as we discussed. Otherwise it will scream on
every boot with a DTS which does not have charger node.

Best regards,
Krzysztof

Re: [PATCH v5 3/8] power: supply: max8997_charger: Set CHARGER current limit

[Krzysztof Kozlowski]

On Mon, Dec 28, 2020 at 11:36:02AM +0000, Timon Baetz wrote:
> Register for extcon notification and set charging current depending on
> the detected cable type. Current values are taken from vendor kernel,
> where most charger types end up setting 650mA [0].
> 
> Also enable and disable the CHARGER regulator based on extcon events.
> 
> [0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/misc/max8997-muic.c#L1675-L1678
> 
> Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
> ---
>  drivers/power/supply/max8997_charger.c | 96 ++++++++++++++++++++++++++
>  1 file changed, 96 insertions(+)
> 
> diff --git a/drivers/power/supply/max8997_charger.c b/drivers/power/supply/max8997_charger.c
> index 1947af25879a..f0f725385dfc 100644
> --- a/drivers/power/supply/max8997_charger.c
> +++ b/drivers/power/supply/max8997_charger.c
> @@ -6,12 +6,14 @@
>  //  MyungJoo Ham <myungjoo.ham@samsung.com>
>  
>  #include <linux/err.h>
> +#include <linux/extcon.h>
>  #include <linux/module.h>
>  #include <linux/slab.h>
>  #include <linux/platform_device.h>
>  #include <linux/power_supply.h>
>  #include <linux/mfd/max8997.h>
>  #include <linux/mfd/max8997-private.h>
> +#include <linux/regulator/consumer.h>
>  
>  /* MAX8997_REG_STATUS4 */
>  #define DCINOK_SHIFT		1
> @@ -31,6 +33,10 @@ struct charger_data {
>  	struct device *dev;
>  	struct max8997_dev *iodev;
>  	struct power_supply *battery;
> +	struct regulator *reg;
> +	struct extcon_dev *edev;
> +	struct notifier_block extcon_nb;
> +	struct work_struct extcon_work;
>  };
>  
>  static enum power_supply_property max8997_battery_props[] = {
> @@ -88,6 +94,67 @@ static int max8997_battery_get_property(struct power_supply *psy,
>  	return 0;
>  }
>  
> +static void max8997_battery_extcon_evt_stop_work(void *data)
> +{
> +	struct charger_data *charger = data;
> +
> +	cancel_work_sync(&charger->extcon_work);
> +}
> +
> +static void max8997_battery_extcon_evt_worker(struct work_struct *work)
> +{
> +	struct charger_data *charger =
> +	    container_of(work, struct charger_data, extcon_work);
> +	struct extcon_dev *edev = charger->edev;
> +	int current_limit;
> +
> +	if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
> +		dev_dbg(charger->dev, "USB SDP charger is connected\n");
> +		current_limit = 450000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
> +		dev_dbg(charger->dev, "USB DCP charger is connected\n");
> +		current_limit = 650000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) {
> +		dev_dbg(charger->dev, "USB FAST charger is connected\n");
> +		current_limit = 650000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) {
> +		dev_dbg(charger->dev, "USB SLOW charger is connected\n");
> +		current_limit = 650000;
> +	} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
> +		dev_dbg(charger->dev, "USB CDP charger is connected\n");
> +		current_limit = 650000;
> +	} else {
> +		dev_dbg(charger->dev, "USB charger is diconnected\n");
> +		current_limit = -1;
> +	}
> +
> +	if (current_limit > 0) {
> +		int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit);
> +
> +		if (ret) {
> +			dev_err(charger->dev, "failed to set current limit: %d\n", ret);
> +			return;
> +		}
> +		ret = regulator_enable(charger->reg);
> +		if (ret)
> +			dev_err(charger->dev, "failed to enable regulator: %d\n", ret);
> +	} else {
> +		int ret  = regulator_disable(charger->reg);
> +
> +		if (ret)
> +			dev_err(charger->dev, "failed to disable regulator: %d\n", ret);
> +	}
> +}
> +
> +static int max8997_battery_extcon_evt(struct notifier_block *nb,
> +				unsigned long event, void *param)
> +{
> +	struct charger_data *charger =
> +		container_of(nb, struct charger_data, extcon_nb);
> +	schedule_work(&charger->extcon_work);
> +	return NOTIFY_OK;
> +}
> +
>  static const struct power_supply_desc max8997_battery_desc = {
>  	.name		= "max8997_pmic",
>  	.type		= POWER_SUPPLY_TYPE_BATTERY,
> @@ -170,6 +237,35 @@ static int max8997_battery_probe(struct platform_device *pdev)
>  		return PTR_ERR(charger->battery);
>  	}
>  
> +	charger->reg = devm_regulator_get_optional(&pdev->dev, "charger");
> +	if (IS_ERR(charger->reg)) {
> +		if (PTR_ERR(charger->reg) == -EPROBE_DEFER)
> +			return -EPROBE_DEFER;
> +		dev_err(&pdev->dev, "couldn't get charger regulator\n");

This should be dev_info, as we discussed. Otherwise it will scream on
every boot with a DTS which does not have charger node.

Best regards,
Krzysztof

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Re: [PATCH v5 1/8] extcon: max8997: Add CHGINS and CHGRM interrupt handling

[Krzysztof Kozlowski]

On Mon, Dec 28, 2020 at 11:35:38AM +0000, Timon Baetz wrote:
> This allows the MAX8997 charger to set the current limit depending on
> the detected extcon charger type.
> 
> Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
> ---
>  drivers/extcon/extcon-max8997.c | 4 ++++
>  1 file changed, 4 insertions(+)

It's already a v5 but what are the changes here? You must provide the
changelog for your patches - either in the cover letter or in each patch.

Best regards,
Krzysztof

Re: [PATCH v5 1/8] extcon: max8997: Add CHGINS and CHGRM interrupt handling

[Krzysztof Kozlowski]

On Mon, Dec 28, 2020 at 11:35:38AM +0000, Timon Baetz wrote:
> This allows the MAX8997 charger to set the current limit depending on
> the detected extcon charger type.
> 
> Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
> ---
>  drivers/extcon/extcon-max8997.c | 4 ++++
>  1 file changed, 4 insertions(+)

It's already a v5 but what are the changes here? You must provide the
changelog for your patches - either in the cover letter or in each patch.

Best regards,
Krzysztof

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