linux-kernel - Re: [PATCH RESEND] usb: gadget: lpc32xx

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Date:	Mon, 15 Oct 2012 16:27:56 +0200
From:	Roland Stigge <stigge@...com.de>
To:	balbi@...com
CC:	Alexandre Pereira da Silva <aletes.xgr@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] usb: gadget: lpc32xx_udc: Fix compatibility with
 STOTG04

On 10/15/2012 03:01 PM, Felipe Balbi wrote:
> On Mon, Oct 15, 2012 at 09:47:35AM -0300, Alexandre Pereira da
> Silva wrote:
>> 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> 
>> ---
>> 
>> This patch is very important to LPC32xx users. IMHO this should
>> go in for 3.7-rc2.
>> 
>> 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)
> 
> why isn't this using a PHY driver instead ?

Right, should definitely be done in a subsequent patch.

Thanks for pointing this out.
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