linux-kernel - [18/90] [ARM] pxa/em-x270: fix usb hub power up/reset sequence

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Date:	Wed, 16 Dec 2009 17:14:29 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Igor Grinberg <grinberg@...pulab.co.il>,
	Mike Rapoport <mike@...pulab.co.il>,
	Eric Miao <eric.y.miao@...il.com>
Subject: [18/90] [ARM] pxa/em-x270: fix usb hub power up/reset sequence

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Igor Grinberg <grinberg@...pulab.co.il>

commit 1b82e4c32fba96d8805b1e2126ba5382e56fac32 upstream.

Signed-off-by: Igor Grinberg <grinberg@...pulab.co.il>
Signed-off-by: Mike Rapoport <mike@...pulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/arm/mach-pxa/em-x270.c |   11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -497,16 +497,15 @@ static int em_x270_usb_hub_init(void)
 		goto err_free_vbus_gpio;
 
 	/* USB Hub power-on and reset */
-	gpio_direction_output(usb_hub_reset, 0);
+	gpio_direction_output(usb_hub_reset, 1);
+	gpio_direction_output(GPIO9_USB_VBUS_EN, 0);
 	regulator_enable(em_x270_usb_ldo);
-	gpio_set_value(usb_hub_reset, 1);
 	gpio_set_value(usb_hub_reset, 0);
+	gpio_set_value(usb_hub_reset, 1);
 	regulator_disable(em_x270_usb_ldo);
 	regulator_enable(em_x270_usb_ldo);
-	gpio_set_value(usb_hub_reset, 1);
-
-	/* enable VBUS */
-	gpio_direction_output(GPIO9_USB_VBUS_EN, 1);
+	gpio_set_value(usb_hub_reset, 0);
+	gpio_set_value(GPIO9_USB_VBUS_EN, 1);
 
 	return 0;
 


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