usb: gadget: tegra-xudc: Add vbus_draw support

Register vbus_draw to gadget ops and update corresponding vbus
draw current to usb_phy.

Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index 52a6add..53e2d1c 100644 (file)
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -492,6 +492,7 @@ struct tegra_xudc {
        bool powergated;
 
        struct usb_phy **usbphy;
+       struct usb_phy *curr_usbphy;
        struct notifier_block vbus_nb;
 
        struct completion disconnect_complete;
@@ -719,6 +720,7 @@ static int tegra_xudc_vbus_notify(struct notifier_block *nb,
        if (!xudc->suspended && phy_index != -1) {
                xudc->curr_utmi_phy = xudc->utmi_phy[phy_index];
                xudc->curr_usb3_phy = xudc->usb3_phy[phy_index];
+               xudc->curr_usbphy = usbphy;
                schedule_work(&xudc->usb_role_sw_work);
        }
 
@@ -2042,6 +2044,20 @@ static int tegra_xudc_gadget_stop(struct usb_gadget *gadget)
        return 0;
 }
 
+static int tegra_xudc_gadget_vbus_draw(struct usb_gadget *gadget,
+                                               unsigned int m_a)
+{
+       int ret = 0;
+       struct tegra_xudc *xudc = to_xudc(gadget);
+
+       dev_dbg(xudc->dev, "%s: %u mA\n", __func__, m_a);
+
+       if (xudc->curr_usbphy->chg_type == SDP_TYPE)
+               ret = usb_phy_set_power(xudc->curr_usbphy, m_a);
+
+       return ret;
+}
+
 static int tegra_xudc_set_selfpowered(struct usb_gadget *gadget, int is_on)
 {
        struct tegra_xudc *xudc = to_xudc(gadget);
@@ -2058,6 +2074,7 @@ static struct usb_gadget_ops tegra_xudc_gadget_ops = {
        .pullup = tegra_xudc_gadget_pullup,
        .udc_start = tegra_xudc_gadget_start,
        .udc_stop = tegra_xudc_gadget_stop,
+       .vbus_draw = tegra_xudc_gadget_vbus_draw,
        .set_selfpowered = tegra_xudc_set_selfpowered,
 };