summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/usb/common/Kconfig1
-rw-r--r--drivers/usb/common/usb-conn-gpio.c45
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 */