phy-sun4i-usb: Add extcon support for the otg phy (phy0)

The sunxi musb glue needs to know if a host or normal usb cable is plugged
in, add extcon support so that the musb glue can monitor the host status.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index e2f2a4d394e1c13f77c2608f6c8348016aac0bbe..c0c1ad2e2c0131029800853af7511ddf72e057fd 100644 (file)
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -208,6 +208,7 @@ config PHY_SUN4I_USB
        tristate "Allwinner sunxi SoC USB PHY driver"
        depends on ARCH_SUNXI && HAS_IOMEM && OF
        depends on RESET_CONTROLLER
+       depends on EXTCON
        select GENERIC_PHY
        help
          Enable this to support the transceiver that is part of Allwinner

diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index 37f52f73fdba4bc6217b873eb9c14344217870e9..a6ea2e6b1d5c7d79c6c09b4a20ee707e4555a6f5 100644 (file)
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -23,6 +23,7 @@
 
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/extcon.h>
 #include <linux/io.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
@@ -99,6 +100,7 @@ struct sun4i_usb_phy_data {
                int index;
        } phys[MAX_PHYS];
        /* phy0 / otg related variables */
+       struct extcon_dev *extcon;
        bool phy0_init;
        bool phy0_poll;
        struct gpio_desc *id_det_gpio;
@@ -343,7 +345,7 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
        struct sun4i_usb_phy_data *data =
                container_of(work, struct sun4i_usb_phy_data, detect.work);
        struct phy *phy0 = data->phys[0].phy;
-       int id_det, vbus_det;
+       int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
 
        id_det = gpiod_get_value_cansleep(data->id_det_gpio);
        vbus_det = gpiod_get_value_cansleep(data->vbus_det_gpio);
@@ -358,15 +360,24 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
        if (id_det != data->id_det) {
                sun4i_usb_phy0_set_id_detect(phy0, id_det);
                data->id_det = id_det;
+               id_notify = 1;
        }
 
        if (vbus_det != data->vbus_det) {
                sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
                data->vbus_det = vbus_det;
+               vbus_notify = 1;
        }
 
        mutex_unlock(&phy0->mutex);
 
+       if (id_notify)
+               extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
+                                       !id_det);
+
+       if (vbus_notify)
+               extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
+
        if (data->phy0_poll)
                queue_delayed_work(system_wq, &data->detect, POLL_TIME);
 }
@@ -407,6 +418,12 @@ static int sun4i_usb_phy_remove(struct platform_device *pdev)
        return 0;
 }
 
+static const unsigned int sun4i_usb_phy0_cable[] = {
+       EXTCON_USB,
+       EXTCON_USB_HOST,
+       EXTCON_NONE,
+};
+
 static int sun4i_usb_phy_probe(struct platform_device *pdev)
 {
        struct sun4i_usb_phy_data *data;
@@ -466,6 +483,19 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
+       if (data->id_det_gpio) {
+               data->extcon = devm_extcon_dev_allocate(dev,
+                                                       sun4i_usb_phy0_cable);
+               if (IS_ERR(data->extcon))
+                       return PTR_ERR(data->extcon);
+
+               ret = devm_extcon_dev_register(dev, data->extcon);
+               if (ret) {
+                       dev_err(dev, "failed to register extcon: %d\n", ret);
+                       return ret;
+               }
+       }
+
        for (i = 0; i < data->num_phys; i++) {
                struct sun4i_usb_phy *phy = data->phys + i;
                char name[16];