[PATCH v10 3/4] drivers/i2c/busses/i2c-at91.c: add new driver

[Voss, Nikolaus]

Hi Carsten,

Carsten Behling wrote on 2012-04-27:
>>  	INIT_COMPLETION(dev->cmd_complete);
>> +	dev->transfer_status = 0;
>>  	if (dev->msg->flags & I2C_M_RD) {
>>  		unsigned start_flags = AT91_TWI_START;
> 
> this patch will not work, because you reset 'dev->transfer_status'
> before it is evaluated on errors (AT91_TWI_NACK, AT91_TWI_OVRE). 

it should, because transfer_status is updated by the ISR between
wait_for_completion_interruptible_timeout() and the error evaluation.
Please try it out.

> > P.S. Are you using a RM9200? Seems that this SOC has some problems...
> 
> Yes, our ECO920 uses the RM9200, but we support it with an very old kernel
> (2.6.21). I remember there were many problems with I2C.

Ok, but good to hear the driver basically works with the RM9200.

Niko