2 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/usb3503.txt b/Documentation/devicetree/bindings/usb/usb3503.txt
index 6813a715fc7d..8c5be48b43c8 100644
--- a/Documentation/devicetree/bindings/usb/usb3503.txt
+++ b/Documentation/devicetree/bindings/usb/usb3503.txt
@@ -4,6 +4,10 @@ Required properties:
 - compatible: Should be "smsc,usb3503".
 - reg: Specifies the i2c slave address, it should be 0x08.
 - connect-gpios: Should specify GPIO for connect.
+- disabled-ports: Should specify the ports unused.
+        '1' or '2' or '3' are availe for this property to describe the port
+        number. 1~3 property values are possible to be desribed.
+        Do not describe this property if all ports have to be enabled.
 - intn-gpios: Should specify GPIO for interrupt.
 - reset-gpios: Should specify GPIO for reset.
 - initial-mode: Should specify initial mode.
@@ -14,6 +18,7 @@ Examples:
                 compatible = "smsc,usb3503";
                 reg = <0x08>;
                 connect-gpios = <&gpx3 0 1>;
+                disabled-ports = <2 3>;
                 intn-gpios = <&gpx3 4 1>;
                 reset-gpios = <&gpx3 5 1>;
                 initial-mode = <1>;
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index ab24bb345979..1908ec65c55b 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -186,6 +186,8 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
         struct usb3503 *hub;
         int err = -ENOMEM;
         u32 mode = USB3503_MODE_UNKNOWN;
+        const u32 *property;
+        int len;
 
         hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);
         if (!hub) {
@@ -203,6 +205,18 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
                 hub->gpio_reset         = pdata->gpio_reset;
                 hub->mode               = pdata->initial_mode;
         } else if (np) {
+                hub->port_off_mask = 0;
+
+                property = of_get_property(np, "disabled-ports", &len);
+                if (property && (len / sizeof(u32)) > 0) {
+                        int i;
+                        for (i = 0; i < len / sizeof(u32); i++) {
+                                u32 port = be32_to_cpu(property[i]);
+                                if ((1 <= port) && (port <= 3))
+                                        hub->port_off_mask |= (1 << port);
+                        }
+                }
+
                 hub->gpio_intn  = of_get_named_gpio(np, "connect-gpios", 0);
                 if (hub->gpio_intn == -EPROBE_DEFER)
                         return -EPROBE_DEFER;