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[0/3] i2c: imx: Fix handling of arbitration loss

Message ID 20200917122029.11121-1-ceggers@arri.de (mailing list archive)
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Series i2c: imx: Fix handling of arbitration loss | expand

Message

Christian Eggers Sept. 17, 2020, 12:20 p.m. UTC 
On my (noisy) system, I2C arbitration losses happen quite often. In it's
current implementation, the IAL flag is partly handled, but has a
number of shortcomings:

1. The driver runs unnecessarily in a timeout when waiting for an
interrupt.

2. The driver performs 500 ms busy-waiting without any value.

3. Arbitration loss errors may be reported one transfer later than they
occured.

Best regards
Christian

Comments

Oleksij Rempel Sept. 25, 2020, 7:03 a.m. UTC | #1 
On Thu, Sep 17, 2020 at 02:20:26PM +0200, Christian Eggers wrote:
> On my (noisy) system, I2C arbitration losses happen quite often. In it's
> current implementation, the IAL flag is partly handled, but has a
> number of shortcomings:
> 
> 1. The driver runs unnecessarily in a timeout when waiting for an
> interrupt.
> 
> 2. The driver performs 500 ms busy-waiting without any value.
> 
> 3. Arbitration loss errors may be reported one transfer later than they
> occured.
> 
> Best regards
> Christian
> 

Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>

Thank you!