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

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Date:	Mon, 17 Sep 2012 11:05:36 +0200
From:	Roland Stigge <stigge@...com.de>
To:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
CC:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: gadget: lpc32xx_udc: Fix compatibility with STOTG04

On 09/12/2012 10:30 PM, 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>

Tested-by: Roland Stigge <stigge@...com.de>

> ---
>  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;

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