Re: [PATCH v2 3/3] i2c: cadence: Check for errata condition involving master receive
From: Harini Katakam
Date: Thu Dec 04 2014 - 23:12:39 EST
Hi,
On Fri, Dec 5, 2014 at 12:04 AM, Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote:
>
>> + /*
>> + * This controller does not give completion interrupt after a
>> + * master receive transfer if HOLD bit is set (repeated start),
>> + * resulting in SW timeout. Hence, if a receive transfer is
>> + * followed by any other transfer, an error is returned
>> + * indicating that this sequence is not supported.
>> + */
>> + for (count = 0; count < num-1; count++) {
>> + if (msgs[count].flags & I2C_M_RD)
>> + return -EOPNOTSUPP;
>> + }
>
> Yeah, a lot better. Probably it would be good to inform the user with a
> warning what went wrong?
>
Sure. I'll add that.
Regards,
Harini
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