From: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
To: Peter Rosin <peda@axentia.se>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-i2c@vger.kernel.org" <linux-i2c@vger.kernel.org>
Subject: Re: Sluggish AT91 I2C driver causes SMBus timeouts
Date: Fri, 13 Oct 2017 14:29:35 +0100 [thread overview]
Message-ID: <20171013142935.14ef302e@alans-desktop> (raw)
In-Reply-To: <3d83fd8b-ade9-da10-3364-2afefa2e90af@axentia.se>
On Thu, 12 Oct 2017 13:35:17 +0200
Peter Rosin <peda@axentia.se> wrote:
> Hi!
>
> I have encountered an "interesting" bug. It silently corrupts data
> and is generally nasty...
>
> On an I2C bus, driven by the at91 driver and DMA (an Atmel
> sama5d31 chip), I have an 256 byte eeprom (NXP SE97BTP). I'm using
> Linux v4.13.
If your force the transfer to PIO does it behave ? Does the controller in
fact need to siwtch to PIO for SMBUS ?
Alan
next prev parent reply other threads:[~2017-10-13 13:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 11:35 Sluggish AT91 I2C driver causes SMBus timeouts Peter Rosin
2017-10-12 14:32 ` Peter Rosin
2017-10-12 14:42 ` Guenter Roeck
2017-10-12 21:19 ` Peter Rosin
2017-10-13 1:27 ` Guenter Roeck
2017-10-13 13:29 ` Alan Cox [this message]
2017-10-13 15:01 ` Peter Rosin
2017-10-17 7:58 ` Ludovic Desroches
2017-10-25 21:40 ` Peter Rosin
2017-10-31 16:10 ` Ludovic Desroches
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