Re: [PATCH 2/2] i2c/designware: Provide optional i2c bus recovery function

[Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>]

On Monday 27 February 2012 02:42 PM, Shubhrajyoti Datta wrote:
> On Mon, Feb 27, 2012 at 12:57 PM, Laxman Dewangan<ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>  wrote:
>> On Monday 27 February 2012 12:51 PM, Shubhrajyoti Datta wrote:
>>> On Fri, Feb 24, 2012 at 5:01 PM, Viresh Kumar<viresh.kumar-qxv4g6HH51o@public.gmane.org>    wrote:
>>>> From: Vincenzo Frascino<vincenzo.frascino-qxv4g6HH51o@public.gmane.org>
>>>>
>>>> Add optional i2c_recover_bus() function to the Synopsys DesignWare I2C
>>>> adapter
>>>> driver that performs i2c bus recovery after timeout. The scope of this
>>>> routine
>>>> is to define i2c bus recovery procedure as specified in the i2c protocol
>>>> Rev. 03
>>>> section 3.16 titled "Bus clear".
>>> What do you do in the function ?
>>>
>>> Could we have it in the driver file itself?
>>>
>> I think bus recovery mechanism is to send  extra clock on SCL line by
>> toggling the pin (using gpio apis)
> You mean the SCL I didnt understand the gpio part?
>
> Why is gpio needed?

How do you toggle the SCL pin?

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