[PATCH 7/9] pcm038: Stop ongoing ULPI transfers before registering the transceiver

[Sascha Hauer]

The ULPI lines are normally input to the USB port. In order to configure
the ULPI transceiver properly the ongoing transfers must be stopped. This
can be done by configuring the the STP pin as gpio output and drinving
it high.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 arch/arm/boards/pcm038/pcm970.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boards/pcm038/pcm970.c b/arch/arm/boards/pcm038/pcm970.c
index 7b25110..a50a1f2 100644
--- a/arch/arm/boards/pcm038/pcm970.c
+++ b/arch/arm/boards/pcm038/pcm970.c
@@ -160,7 +160,7 @@ static int pcm970_init(void)
 		PA1_PF_USBH2_DIR,
 		PA2_PF_USBH2_DATA7,
 		PA3_PF_USBH2_NXT,
-		PA4_PF_USBH2_STP,
+		4 | GPIO_PORTA | GPIO_GPIO | GPIO_OUT,
 		PD19_AF_USBH2_DATA4,
 		PD20_AF_USBH2_DATA3,
 		PD21_AF_USBH2_DATA6,
@@ -176,8 +176,14 @@ static int pcm970_init(void)
 	/* Configure SJA1000 on cs4 */
 	imx27_setup_weimcs(4, 0x0000DCF6, 0x444A0301, 0x44443302);
 
-	if (IS_ENABLED(CONFIG_USB))
+	if (IS_ENABLED(CONFIG_USB)) {
+		/* Stop ULPI */
+		gpio_direction_output(4, 1);
+		mdelay(1);
+		imx_gpio_mode(PA4_PF_USBH2_STP);
+
 		imx27_add_usbh2(&pcm970_usbh2_pdata);
+	}
 
 #ifdef CONFIG_DISK_INTF_PLATFORM_IDE
 	pcm970_ide_init();
-- 
1.7.10.4