usb: misc: usb3503: Add to select the ports to disable

This patch is to disable the USB ports unconnected to USB3503. In order to
disable the port, 'port_off_mask' must be set.

* Disable PORT1 only
.port_off_mask = USB3503_OFF_PORT1;

* Disable PORT1 and PORT3 only
.port_off_mask = USB3503_OFF_PORT1 | USB3503_OFF_PORT3;

* Enables all ports
.port_off_mask = 0;

Signed-off-by: Dongjin Kim <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/misc/usb3503.c

···
 #define USB3503_NRD		0x09
 
 #define USB3503_PDS		0x0a
-#define USB3503_PORT1		(1 << 1)
-#define USB3503_PORT2		(1 << 2)
-#define USB3503_PORT3		(1 << 3)
 
 #define USB3503_SP_ILOCK	0xe7
 #define USB3503_SPILOCK_CONNECT	(1 << 1)
···
 struct usb3503 {
 	enum usb3503_mode	mode;
 	struct i2c_client	*client;
+	u8	port_off_mask;
 	int	gpio_intn;
 	int	gpio_reset;
 	int	gpio_connect;
···
 			goto err_hubmode;
 		}
 
-		/* PDS : Port2,3 Disable For Self Powered Operation */
-		err = usb3503_set_bits(i2c, USB3503_PDS,
-				(USB3503_PORT2 | USB3503_PORT3));
-		if (err < 0) {
-			dev_err(&i2c->dev, "PDS failed (%d)\n", err);
-			goto err_hubmode;
+		/* PDS : Disable For Self Powered Operation */
+		if (hub->port_off_mask) {
+			err = usb3503_set_bits(i2c, USB3503_PDS,
+					hub->port_off_mask);
+			if (err < 0) {
+				dev_err(&i2c->dev, "PDS failed (%d)\n", err);
+				goto err_hubmode;
+			}
 		}
 
 		/* CFG1 : SELF_BUS_PWR -> Self-Powerd operation */
···
 	hub->client = i2c;
 
 	if (pdata) {
+		hub->port_off_mask	= pdata->port_off_mask;
 		hub->gpio_intn		= pdata->gpio_intn;
 		hub->gpio_connect	= pdata->gpio_connect;
 		hub->gpio_reset		= pdata->gpio_reset;

include/linux/platform_data/usb3503.h

···
 
 #define USB3503_I2C_NAME	"usb3503"
 
+#define USB3503_OFF_PORT1	(1 << 1)
+#define USB3503_OFF_PORT2	(1 << 2)
+#define USB3503_OFF_PORT3	(1 << 3)
+
 enum usb3503_mode {
 	USB3503_MODE_UNKNOWN,
 	USB3503_MODE_HUB,
···
 
 struct usb3503_platform_data {
 	enum usb3503_mode	initial_mode;
+	u8	port_off_mask;
 	int	gpio_intn;
 	int	gpio_connect;
 	int	gpio_reset;