diff options
| -rw-r--r-- | drivers/usb/phy/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/usb/phy/phy.c | 57 | ||||
| -rw-r--r-- | include/linux/usb/phy.h | 7 |
3 files changed, 67 insertions, 3 deletions
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig index 3006f569c068..aff702c0eb9f 100644 --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -4,6 +4,7 @@ menu "USB Physical Layer drivers" config USB_PHY + select EXTCON def_bool n # @@ -109,7 +110,7 @@ config OMAP_OTG config TAHVO_USB tristate "Tahvo USB transceiver driver" - depends on MFD_RETU && EXTCON + depends on MFD_RETU depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' select USB_PHY help @@ -141,7 +142,6 @@ config USB_MSM_OTG depends on (USB || USB_GADGET) && (ARCH_QCOM || COMPILE_TEST) depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' depends on RESET_CONTROLLER - depends on EXTCON select USB_PHY help Enable this to support the USB OTG transceiver on Qualcomm chips. It @@ -155,7 +155,7 @@ config USB_MSM_OTG config USB_QCOM_8X16_PHY tristate "Qualcomm APQ8016/MSM8916 on-chip USB PHY controller support" depends on ARCH_QCOM || COMPILE_TEST - depends on RESET_CONTROLLER && EXTCON + depends on RESET_CONTROLLER select USB_PHY select USB_ULPI_VIEWPORT help diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c index 98f75d2842b7..032f5afaad4b 100644 --- a/drivers/usb/phy/phy.c +++ b/drivers/usb/phy/phy.c @@ -100,6 +100,54 @@ static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) return *phy == match_data; } +static int usb_add_extcon(struct usb_phy *x) +{ + int ret; + + if (of_property_read_bool(x->dev->of_node, "extcon")) { + x->edev = extcon_get_edev_by_phandle(x->dev, 0); + if (IS_ERR(x->edev)) + return PTR_ERR(x->edev); + + x->id_edev = extcon_get_edev_by_phandle(x->dev, 1); + if (IS_ERR(x->id_edev)) { + x->id_edev = NULL; + dev_info(x->dev, "No separate ID extcon device\n"); + } + + if (x->vbus_nb.notifier_call) { + ret = devm_extcon_register_notifier(x->dev, x->edev, + EXTCON_USB, + &x->vbus_nb); + if (ret < 0) { + dev_err(x->dev, + "register VBUS notifier failed\n"); + return ret; + } + } + + if (x->id_nb.notifier_call) { + struct extcon_dev *id_ext; + + if (x->id_edev) + id_ext = x->id_edev; + else + id_ext = x->edev; + + ret = devm_extcon_register_notifier(x->dev, id_ext, + EXTCON_USB_HOST, + &x->id_nb); + if (ret < 0) { + dev_err(x->dev, + "register ID notifier failed\n"); + return ret; + } + } + } + + return 0; +} + /** * devm_usb_get_phy - find the USB PHY * @dev - device that requests this phy @@ -388,6 +436,10 @@ int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) return -EINVAL; } + ret = usb_add_extcon(x); + if (ret) + return ret; + ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); spin_lock_irqsave(&phy_lock, flags); @@ -422,12 +474,17 @@ int usb_add_phy_dev(struct usb_phy *x) { struct usb_phy_bind *phy_bind; unsigned long flags; + int ret; if (!x->dev) { dev_err(x->dev, "no device provided for PHY\n"); return -EINVAL; } + ret = usb_add_extcon(x); + if (ret) + return ret; + ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); spin_lock_irqsave(&phy_lock, flags); diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h index 31a8068c42a5..299245105610 100644 --- a/include/linux/usb/phy.h +++ b/include/linux/usb/phy.h @@ -9,6 +9,7 @@ #ifndef __LINUX_USB_PHY_H #define __LINUX_USB_PHY_H +#include <linux/extcon.h> #include <linux/notifier.h> #include <linux/usb.h> @@ -85,6 +86,12 @@ struct usb_phy { struct usb_phy_io_ops *io_ops; void __iomem *io_priv; + /* to support extcon device */ + struct extcon_dev *edev; + struct extcon_dev *id_edev; + struct notifier_block vbus_nb; + struct notifier_block id_nb; + /* for notification of usb_phy_events */ struct atomic_notifier_head notifier; |