From: Igor Grinberg <grinberg@compulab.co.il>
Date: Tue, 13 Dec 2011 18:48:53 +0000 (-0800)
Subject: ARM: OMAP3: cm-t35: Add reset for USB hub
X-Git-Tag: firefly_0821_release~3680^2~3792^2~8^2^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=039401f3efa890cd9974d8921c19359ac2084df3;p=firefly-linux-kernel-4.4.55.git

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>
---

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)