linux-kernel - [PATCH] usb: gadget: lpc32xx_udc: Fix compatibility with STOTG04

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Date:	Wed, 12 Sep 2012 17:30:10 -0300
From:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
To:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Roland Stigge <stigge@...com.de>
Cc:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
Subject: [PATCH] usb: gadget: lpc32xx_udc: Fix compatibility with STOTG04

The STOTG04 is an replacement for ISP1301.

Most of the registers on STOTG04 are the same as on ISP1301, but the
register ISP1301_I2C_OTG_CONTROL_2 (address 0x10) doesn't exist on the
ST part.

This is a work around for this by using the interrupt source register that
should behave the same on both parts and has the needed information.

Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>
---
 drivers/usb/gadget/lpc32xx_udc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/lpc32xx_udc.c b/drivers/usb/gadget/lpc32xx_udc.c
index f696fb9..21a9861 100644
--- a/drivers/usb/gadget/lpc32xx_udc.c
+++ b/drivers/usb/gadget/lpc32xx_udc.c
@@ -2930,10 +2930,10 @@ static void vbus_work(struct work_struct *work)
 
 		/* Get the VBUS status from the transceiver */
 		value = i2c_smbus_read_byte_data(udc->isp1301_i2c_client,
-						 ISP1301_I2C_OTG_CONTROL_2);
+						 ISP1301_I2C_INTERRUPT_SOURCE);
 
 		/* VBUS on or off? */
-		if (value & OTG_B_SESS_VLD)
+		if (value & INT_SESS_VLD)
 			udc->vbus = 1;
 		else
 			udc->vbus = 0;
-- 
1.7.10

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