ARM: OMAP3: cm-t35: Add reset for USB hub

USB hub is not functional until is reset.
Reset the USB hub on SB-T35.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
[tony@atomide.com: updated subject]
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/arch/arm/mach-omap2/board-cm-t35.c b/arch/arm/mach-omap2/board-cm-t35.c
index c417b7d004d1..865f96da771e 100644
--- a/arch/arm/mach-omap2/board-cm-t35.c
+++ b/arch/arm/mach-omap2/board-cm-t35.c
@@ -53,7 +53,8 @@
 #include "hsmmc.h"
 #include "common-board-devices.h"
 
-#define CM_T35_GPIO_PENDOWN     57
+#define CM_T35_GPIO_PENDOWN             57
+#define SB_T35_USB_HUB_RESET_GPIO       167
 
 #define CM_T35_SMSC911X_CS      5
 #define CM_T35_SMSC911X_GPIO    163
@@ -436,6 +437,23 @@ static struct usbhs_omap_board_data usbhs_bdata __initdata = {
         .reset_gpio_port[2]  = -EINVAL
 };
 
+static void cm_t35_init_usbh(void)
+{
+        int err;
+
+        err = gpio_request_one(SB_T35_USB_HUB_RESET_GPIO,
+                               GPIOF_OUT_INIT_LOW, "usb hub rst");
+        if (err) {
+                pr_err("SB-T35: usb hub rst gpio request failed: %d\n", err);
+        } else {
+                udelay(10);
+                gpio_set_value(SB_T35_USB_HUB_RESET_GPIO, 1);
+                msleep(1);
+        }
+
+        usbhs_init(&usbhs_bdata);
+}
+
 static int cm_t35_twl_gpio_setup(struct device *dev, unsigned gpio,
                                  unsigned ngpio)
 {
@@ -624,7 +642,7 @@ static void __init cm_t3x_common_init(void)
         cm_t35_init_display();
 
         usb_musb_init(NULL);
-        usbhs_init(&usbhs_bdata);
+        cm_t35_init_usbh();
 }
 
 static void __init cm_t35_init(void)