* [PATCH 0/3] i2c: imx: Fix handling of arbitration loss
@ 2020-09-17 12:13 Christian Eggers
0 siblings, 0 replies; 3+ messages in thread
From: Christian Eggers @ 2020-09-17 12:13 UTC (permalink / raw)
To: Oleksij Rempel, Shawn Guo, Sascha Hauer, Fabio Estevam
Cc: Pengutronix Kernel Team, NXP Linux Team, linux-i2c,
linux-arm-kernel, linux-kernel
On my (noisy) system, I2C arbitration losses happen quite often. In it's
current implementation, the IAL flags 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
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 0/3] i2c: imx: Fix handling of arbitration loss
@ 2020-09-17 12:20 Christian Eggers
2020-09-25 7:03 ` Oleksij Rempel
0 siblings, 1 reply; 3+ messages in thread
From: Christian Eggers @ 2020-09-17 12:20 UTC (permalink / raw)
To: Oleksij Rempel, Shawn Guo, Sascha Hauer, Fabio Estevam
Cc: Pengutronix Kernel Team, NXP Linux Team, linux-i2c,
linux-arm-kernel, linux-kernel
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 0/3] i2c: imx: Fix handling of arbitration loss
2020-09-17 12:20 Christian Eggers
@ 2020-09-25 7:03 ` Oleksij Rempel
0 siblings, 0 replies; 3+ messages in thread
From: Oleksij Rempel @ 2020-09-25 7:03 UTC (permalink / raw)
To: Christian Eggers
Cc: Oleksij Rempel, Shawn Guo, Sascha Hauer, Fabio Estevam,
linux-arm-kernel, linux-kernel, NXP Linux Team,
Pengutronix Kernel Team, linux-i2c
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!
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-09-25 7:04 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-17 12:13 [PATCH 0/3] i2c: imx: Fix handling of arbitration loss Christian Eggers
2020-09-17 12:20 Christian Eggers
2020-09-25 7:03 ` Oleksij Rempel
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).