[PATCH 1/2] usb: gadget: udc: renesas_usb3: add property "renesas,ignore-id"

[Yoshihiro Shimoda]

This patch adds a new property to ignore the ID signal on a board.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
---
 Documentation/devicetree/bindings/usb/renesas_usb3.txt |  2 ++
 drivers/usb/gadget/udc/renesas_usb3.c                  | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/renesas_usb3.txt 
b/Documentation/devicetree/bindings/usb/renesas_usb3.txt
index 2c071bb..53949bd 100644
--- a/Documentation/devicetree/bindings/usb/renesas_usb3.txt
+++ b/Documentation/devicetree/bindings/usb/renesas_usb3.txt
@@ -19,6 +19,8 @@ Required properties:
 Optional properties:
   - phys: phandle + phy specifier pair
   - phy-names: must be "usb"
+  - renesas,ignore-id: when a board doesn't use ID pin, you can add this
+                      property to ignore the ID state.
 
 Example of R-Car H3 ES1.x:
        usb3_peri0: usb@ee020000 {
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c 
b/drivers/usb/gadget/udc/renesas_usb3.c
index 409cde4..59e1485 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -350,6 +350,7 @@ struct renesas_usb3 {
        bool extcon_host;               /* check id and set EXTCON_USB_HOST */
        bool extcon_usb;                /* check vbus and set EXTCON_USB */
        bool forced_b_device;
+       bool ignore_id;
 };
 
 #define gadget_to_renesas_usb3(_gadget)        \
@@ -645,6 +646,9 @@ static void usb3_check_vbus(struct renesas_usb3 *usb3)
 
 static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
 {
+       if (usb3->ignore_id && !usb3->forced_b_device)
+               return;
+
        if (host)
                usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
        else
@@ -675,6 +679,9 @@ static void usb3_mode_config(struct renesas_usb3 *usb3, 
bool host, bool a_dev)
 
 static bool usb3_is_a_device(struct renesas_usb3 *usb3)
 {
+       if (usb3->ignore_id)
+               return false;
+
        return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
 }
 
@@ -2632,6 +2639,9 @@ static int renesas_usb3_probe(struct platform_device 
*pdev)
        if (ret < 0)
                goto err_add_udc;
 
+       if (of_property_read_bool(pdev->dev.of_node, "renesas,no-id"))
+               usb3->ignore_id = true;
+
        ret = device_create_file(&pdev->dev, &dev_attr_role);
        if (ret < 0)
                goto err_dev_create;
-- 
1.9.1