--- /dev/null
+Analog Devices LT3651 Charger Power Supply bindings: lt3651-charger
+
+Required properties:
+- compatible: Should contain one of the following:
+ * "lltc,ltc3651-charger", (DEPRECATED: Use "lltc,lt3651-charger")
+ * "lltc,lt3651-charger"
+ - lltc,acpr-gpios: Connect to ACPR output. See remark below.
+
+Optional properties:
+ - lltc,fault-gpios: Connect to FAULT output. See remark below.
+ - lltc,chrg-gpios: Connect to CHRG output. See remark below.
+
+The lt3651 outputs are open-drain type and active low. The driver assumes the
+GPIO reports "active" when the output is asserted, so if the pins have been
+connected directly, the GPIO flags should be set to active low also.
+
+The driver will attempt to aquire interrupts for all GPIOs to detect changes in
+line state. If the system is not capabale of providing interrupts, the driver
+cannot report changes and userspace will need to periodically read the sysfs
+attributes to detect changes.
+
+Example:
+
+ charger: battery-charger {
+ compatible = "lltc,lt3651-charger";
+ lltc,acpr-gpios = <&gpio0 68 GPIO_ACTIVE_LOW>;
+ lltc,fault-gpios = <&gpio0 64 GPIO_ACTIVE_LOW>;
+ lltc,chrg-gpios = <&gpio0 63 GPIO_ACTIVE_LOW>;
+ };
+++ /dev/null
-Analog Devices LT3651 Charger Power Supply bindings: lt3651-charger
-
-Required properties:
-- compatible: Should contain one of the following:
- * "lltc,ltc3651-charger", (DEPRECATED: Use "lltc,lt3651-charger")
- * "lltc,lt3651-charger"
- - lltc,acpr-gpios: Connect to ACPR output. See remark below.
-
-Optional properties:
- - lltc,fault-gpios: Connect to FAULT output. See remark below.
- - lltc,chrg-gpios: Connect to CHRG output. See remark below.
-
-The lt3651 outputs are open-drain type and active low. The driver assumes the
-GPIO reports "active" when the output is asserted, so if the pins have been
-connected directly, the GPIO flags should be set to active low also.
-
-The driver will attempt to aquire interrupts for all GPIOs to detect changes in
-line state. If the system is not capabale of providing interrupts, the driver
-cannot report changes and userspace will need to periodically read the sysfs
-attributes to detect changes.
-
-Example:
-
- charger: battery-charger {
- compatible = "lltc,lt3651-charger";
- lltc,acpr-gpios = <&gpio0 68 GPIO_ACTIVE_LOW>;
- lltc,fault-gpios = <&gpio0 64 GPIO_ACTIVE_LOW>;
- lltc,chrg-gpios = <&gpio0 63 GPIO_ACTIVE_LOW>;
- };
obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o
obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o
-obj-$(CONFIG_CHARGER_LT3651) += ltc3651-charger.o
+obj-$(CONFIG_CHARGER_LT3651) += lt3651-charger.o
obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
obj-$(CONFIG_CHARGER_DETECTOR_MAX14656) += max14656_charger_detector.o
obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for Analog Devices (Linear Technology) LT3651 charger IC.
+ * Copyright (C) 2017, Topic Embedded Products
+ */
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+struct lt3651_charger {
+ struct power_supply *charger;
+ struct power_supply_desc charger_desc;
+ struct gpio_desc *acpr_gpio;
+ struct gpio_desc *fault_gpio;
+ struct gpio_desc *chrg_gpio;
+};
+
+static irqreturn_t lt3651_charger_irq(int irq, void *devid)
+{
+ struct power_supply *charger = devid;
+
+ power_supply_changed(charger);
+
+ return IRQ_HANDLED;
+}
+
+static inline struct lt3651_charger *psy_to_lt3651_charger(
+ struct power_supply *psy)
+{
+ return power_supply_get_drvdata(psy);
+}
+
+static int lt3651_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp, union power_supply_propval *val)
+{
+ struct lt3651_charger *lt3651_charger = psy_to_lt3651_charger(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (!lt3651_charger->chrg_gpio) {
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+ }
+ if (gpiod_get_value(lt3651_charger->chrg_gpio))
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = gpiod_get_value(lt3651_charger->acpr_gpio);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (!lt3651_charger->fault_gpio) {
+ val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
+ break;
+ }
+ if (!gpiod_get_value(lt3651_charger->fault_gpio)) {
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ }
+ /*
+ * If the fault pin is active, the chrg pin explains the type
+ * of failure.
+ */
+ if (!lt3651_charger->chrg_gpio) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ }
+ val->intval = gpiod_get_value(lt3651_charger->chrg_gpio) ?
+ POWER_SUPPLY_HEALTH_OVERHEAT :
+ POWER_SUPPLY_HEALTH_DEAD;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property lt3651_charger_properties[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+};
+
+static int lt3651_charger_probe(struct platform_device *pdev)
+{
+ struct power_supply_config psy_cfg = {};
+ struct lt3651_charger *lt3651_charger;
+ struct power_supply_desc *charger_desc;
+ int ret;
+
+ lt3651_charger = devm_kzalloc(&pdev->dev, sizeof(*lt3651_charger),
+ GFP_KERNEL);
+ if (!lt3651_charger)
+ return -ENOMEM;
+
+ lt3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,
+ "lltc,acpr", GPIOD_IN);
+ if (IS_ERR(lt3651_charger->acpr_gpio)) {
+ ret = PTR_ERR(lt3651_charger->acpr_gpio);
+ dev_err(&pdev->dev, "Failed to acquire acpr GPIO: %d\n", ret);
+ return ret;
+ }
+ lt3651_charger->fault_gpio = devm_gpiod_get_optional(&pdev->dev,
+ "lltc,fault", GPIOD_IN);
+ if (IS_ERR(lt3651_charger->fault_gpio)) {
+ ret = PTR_ERR(lt3651_charger->fault_gpio);
+ dev_err(&pdev->dev, "Failed to acquire fault GPIO: %d\n", ret);
+ return ret;
+ }
+ lt3651_charger->chrg_gpio = devm_gpiod_get_optional(&pdev->dev,
+ "lltc,chrg", GPIOD_IN);
+ if (IS_ERR(lt3651_charger->chrg_gpio)) {
+ ret = PTR_ERR(lt3651_charger->chrg_gpio);
+ dev_err(&pdev->dev, "Failed to acquire chrg GPIO: %d\n", ret);
+ return ret;
+ }
+
+ charger_desc = <3651_charger->charger_desc;
+ charger_desc->name = pdev->dev.of_node->name;
+ charger_desc->type = POWER_SUPPLY_TYPE_MAINS;
+ charger_desc->properties = lt3651_charger_properties;
+ charger_desc->num_properties = ARRAY_SIZE(lt3651_charger_properties);
+ charger_desc->get_property = lt3651_charger_get_property;
+ psy_cfg.of_node = pdev->dev.of_node;
+ psy_cfg.drv_data = lt3651_charger;
+
+ lt3651_charger->charger = devm_power_supply_register(&pdev->dev,
+ charger_desc, &psy_cfg);
+ if (IS_ERR(lt3651_charger->charger)) {
+ ret = PTR_ERR(lt3651_charger->charger);
+ dev_err(&pdev->dev, "Failed to register power supply: %d\n",
+ ret);
+ return ret;
+ }
+
+ /*
+ * Acquire IRQs for the GPIO pins if possible. If the system does not
+ * support IRQs on these pins, userspace will have to poll the sysfs
+ * files manually.
+ */
+ if (lt3651_charger->acpr_gpio) {
+ ret = gpiod_to_irq(lt3651_charger->acpr_gpio);
+ if (ret >= 0)
+ ret = devm_request_any_context_irq(&pdev->dev, ret,
+ lt3651_charger_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dev_name(&pdev->dev), lt3651_charger->charger);
+ if (ret < 0)
+ dev_warn(&pdev->dev, "Failed to request acpr irq\n");
+ }
+ if (lt3651_charger->fault_gpio) {
+ ret = gpiod_to_irq(lt3651_charger->fault_gpio);
+ if (ret >= 0)
+ ret = devm_request_any_context_irq(&pdev->dev, ret,
+ lt3651_charger_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dev_name(&pdev->dev), lt3651_charger->charger);
+ if (ret < 0)
+ dev_warn(&pdev->dev, "Failed to request fault irq\n");
+ }
+ if (lt3651_charger->chrg_gpio) {
+ ret = gpiod_to_irq(lt3651_charger->chrg_gpio);
+ if (ret >= 0)
+ ret = devm_request_any_context_irq(&pdev->dev, ret,
+ lt3651_charger_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dev_name(&pdev->dev), lt3651_charger->charger);
+ if (ret < 0)
+ dev_warn(&pdev->dev, "Failed to request chrg irq\n");
+ }
+
+ platform_set_drvdata(pdev, lt3651_charger);
+
+ return 0;
+}
+
+static const struct of_device_id lt3651_charger_match[] = {
+ { .compatible = "lltc,ltc3651-charger" }, /* DEPRECATED */
+ { .compatible = "lltc,lt3651-charger" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lt3651_charger_match);
+
+static struct platform_driver lt3651_charger_driver = {
+ .probe = lt3651_charger_probe,
+ .driver = {
+ .name = "lt3651-charger",
+ .of_match_table = lt3651_charger_match,
+ },
+};
+
+module_platform_driver(lt3651_charger_driver);
+
+MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>");
+MODULE_DESCRIPTION("Driver for LT3651 charger");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lt3651-charger");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Driver for Analog Devices (Linear Technology) LT3651 charger IC.
- * Copyright (C) 2017, Topic Embedded Products
- */
-
-#include <linux/device.h>
-#include <linux/gpio/consumer.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/power_supply.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-
-struct lt3651_charger {
- struct power_supply *charger;
- struct power_supply_desc charger_desc;
- struct gpio_desc *acpr_gpio;
- struct gpio_desc *fault_gpio;
- struct gpio_desc *chrg_gpio;
-};
-
-static irqreturn_t lt3651_charger_irq(int irq, void *devid)
-{
- struct power_supply *charger = devid;
-
- power_supply_changed(charger);
-
- return IRQ_HANDLED;
-}
-
-static inline struct lt3651_charger *psy_to_lt3651_charger(
- struct power_supply *psy)
-{
- return power_supply_get_drvdata(psy);
-}
-
-static int lt3651_charger_get_property(struct power_supply *psy,
- enum power_supply_property psp, union power_supply_propval *val)
-{
- struct lt3651_charger *lt3651_charger = psy_to_lt3651_charger(psy);
-
- switch (psp) {
- case POWER_SUPPLY_PROP_STATUS:
- if (!lt3651_charger->chrg_gpio) {
- val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
- break;
- }
- if (gpiod_get_value(lt3651_charger->chrg_gpio))
- val->intval = POWER_SUPPLY_STATUS_CHARGING;
- else
- val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
- break;
- case POWER_SUPPLY_PROP_ONLINE:
- val->intval = gpiod_get_value(lt3651_charger->acpr_gpio);
- break;
- case POWER_SUPPLY_PROP_HEALTH:
- if (!lt3651_charger->fault_gpio) {
- val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
- break;
- }
- if (!gpiod_get_value(lt3651_charger->fault_gpio)) {
- val->intval = POWER_SUPPLY_HEALTH_GOOD;
- break;
- }
- /*
- * If the fault pin is active, the chrg pin explains the type
- * of failure.
- */
- if (!lt3651_charger->chrg_gpio) {
- val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
- break;
- }
- val->intval = gpiod_get_value(lt3651_charger->chrg_gpio) ?
- POWER_SUPPLY_HEALTH_OVERHEAT :
- POWER_SUPPLY_HEALTH_DEAD;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static enum power_supply_property lt3651_charger_properties[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_ONLINE,
- POWER_SUPPLY_PROP_HEALTH,
-};
-
-static int lt3651_charger_probe(struct platform_device *pdev)
-{
- struct power_supply_config psy_cfg = {};
- struct lt3651_charger *lt3651_charger;
- struct power_supply_desc *charger_desc;
- int ret;
-
- lt3651_charger = devm_kzalloc(&pdev->dev, sizeof(*lt3651_charger),
- GFP_KERNEL);
- if (!lt3651_charger)
- return -ENOMEM;
-
- lt3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,
- "lltc,acpr", GPIOD_IN);
- if (IS_ERR(lt3651_charger->acpr_gpio)) {
- ret = PTR_ERR(lt3651_charger->acpr_gpio);
- dev_err(&pdev->dev, "Failed to acquire acpr GPIO: %d\n", ret);
- return ret;
- }
- lt3651_charger->fault_gpio = devm_gpiod_get_optional(&pdev->dev,
- "lltc,fault", GPIOD_IN);
- if (IS_ERR(lt3651_charger->fault_gpio)) {
- ret = PTR_ERR(lt3651_charger->fault_gpio);
- dev_err(&pdev->dev, "Failed to acquire fault GPIO: %d\n", ret);
- return ret;
- }
- lt3651_charger->chrg_gpio = devm_gpiod_get_optional(&pdev->dev,
- "lltc,chrg", GPIOD_IN);
- if (IS_ERR(lt3651_charger->chrg_gpio)) {
- ret = PTR_ERR(lt3651_charger->chrg_gpio);
- dev_err(&pdev->dev, "Failed to acquire chrg GPIO: %d\n", ret);
- return ret;
- }
-
- charger_desc = <3651_charger->charger_desc;
- charger_desc->name = pdev->dev.of_node->name;
- charger_desc->type = POWER_SUPPLY_TYPE_MAINS;
- charger_desc->properties = lt3651_charger_properties;
- charger_desc->num_properties = ARRAY_SIZE(lt3651_charger_properties);
- charger_desc->get_property = lt3651_charger_get_property;
- psy_cfg.of_node = pdev->dev.of_node;
- psy_cfg.drv_data = lt3651_charger;
-
- lt3651_charger->charger = devm_power_supply_register(&pdev->dev,
- charger_desc, &psy_cfg);
- if (IS_ERR(lt3651_charger->charger)) {
- ret = PTR_ERR(lt3651_charger->charger);
- dev_err(&pdev->dev, "Failed to register power supply: %d\n",
- ret);
- return ret;
- }
-
- /*
- * Acquire IRQs for the GPIO pins if possible. If the system does not
- * support IRQs on these pins, userspace will have to poll the sysfs
- * files manually.
- */
- if (lt3651_charger->acpr_gpio) {
- ret = gpiod_to_irq(lt3651_charger->acpr_gpio);
- if (ret >= 0)
- ret = devm_request_any_context_irq(&pdev->dev, ret,
- lt3651_charger_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- dev_name(&pdev->dev), lt3651_charger->charger);
- if (ret < 0)
- dev_warn(&pdev->dev, "Failed to request acpr irq\n");
- }
- if (lt3651_charger->fault_gpio) {
- ret = gpiod_to_irq(lt3651_charger->fault_gpio);
- if (ret >= 0)
- ret = devm_request_any_context_irq(&pdev->dev, ret,
- lt3651_charger_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- dev_name(&pdev->dev), lt3651_charger->charger);
- if (ret < 0)
- dev_warn(&pdev->dev, "Failed to request fault irq\n");
- }
- if (lt3651_charger->chrg_gpio) {
- ret = gpiod_to_irq(lt3651_charger->chrg_gpio);
- if (ret >= 0)
- ret = devm_request_any_context_irq(&pdev->dev, ret,
- lt3651_charger_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- dev_name(&pdev->dev), lt3651_charger->charger);
- if (ret < 0)
- dev_warn(&pdev->dev, "Failed to request chrg irq\n");
- }
-
- platform_set_drvdata(pdev, lt3651_charger);
-
- return 0;
-}
-
-static const struct of_device_id lt3651_charger_match[] = {
- { .compatible = "lltc,ltc3651-charger" }, /* DEPRECATED */
- { .compatible = "lltc,lt3651-charger" },
- { }
-};
-MODULE_DEVICE_TABLE(of, lt3651_charger_match);
-
-static struct platform_driver lt3651_charger_driver = {
- .probe = lt3651_charger_probe,
- .driver = {
- .name = "lt3651-charger",
- .of_match_table = lt3651_charger_match,
- },
-};
-
-module_platform_driver(lt3651_charger_driver);
-
-MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>");
-MODULE_DESCRIPTION("Driver for LT3651 charger");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:lt3651-charger");
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