diff options
Diffstat (limited to 'drivers/usb/common')
| -rw-r--r-- | drivers/usb/common/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/usb/common/usb-conn-gpio.c | 45 |
2 files changed, 46 insertions, 0 deletions
diff --git a/drivers/usb/common/Kconfig b/drivers/usb/common/Kconfig index d611477aae41..5e8a04e3dd3c 100644 --- a/drivers/usb/common/Kconfig +++ b/drivers/usb/common/Kconfig @@ -40,6 +40,7 @@ config USB_CONN_GPIO tristate "USB GPIO Based Connection Detection Driver" depends on GPIOLIB select USB_ROLE_SWITCH + select POWER_SUPPLY help The driver supports USB role switch between host and device via GPIO based USB cable detection, used typically if an input GPIO is used diff --git a/drivers/usb/common/usb-conn-gpio.c b/drivers/usb/common/usb-conn-gpio.c index b4051f042c79..7b3a21360d7c 100644 --- a/drivers/usb/common/usb-conn-gpio.c +++ b/drivers/usb/common/usb-conn-gpio.c @@ -17,6 +17,7 @@ #include <linux/of.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> +#include <linux/power_supply.h> #include <linux/regulator/consumer.h> #include <linux/usb/role.h> @@ -38,6 +39,9 @@ struct usb_conn_info { struct gpio_desc *vbus_gpiod; int id_irq; int vbus_irq; + + struct power_supply_desc desc; + struct power_supply *charger; }; /* @@ -104,6 +108,8 @@ static void usb_conn_detect_cable(struct work_struct *work) dev_dbg(info->dev, "vbus regulator is %s\n", regulator_is_enabled(info->vbus) ? "enabled" : "disabled"); + + power_supply_changed(info->charger); } static void usb_conn_queue_dwork(struct usb_conn_info *info, @@ -121,10 +127,35 @@ static irqreturn_t usb_conn_isr(int irq, void *dev_id) return IRQ_HANDLED; } +static enum power_supply_property usb_charger_properties[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static int usb_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct usb_conn_info *info = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = info->last_role == USB_ROLE_DEVICE; + break; + default: + return -EINVAL; + } + + return 0; +} + static int usb_conn_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct power_supply_desc *desc; struct usb_conn_info *info; + struct power_supply_config cfg = { + .of_node = dev->of_node, + }; int ret = 0; info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); @@ -203,6 +234,20 @@ static int usb_conn_probe(struct platform_device *pdev) } } + desc = &info->desc; + desc->name = "usb-charger"; + desc->properties = usb_charger_properties; + desc->num_properties = ARRAY_SIZE(usb_charger_properties); + desc->get_property = usb_charger_get_property; + desc->type = POWER_SUPPLY_TYPE_USB; + cfg.drv_data = info; + + info->charger = devm_power_supply_register(dev, desc, &cfg); + if (IS_ERR(info->charger)) { + dev_err(dev, "Unable to register charger\n"); + return PTR_ERR(info->charger); + } + platform_set_drvdata(pdev, info); /* Perform initial detection */ |