Re: [PATCH v2 1/4] i2c: imx: only poll for bus busy in multi master mode

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Subject: Re: [PATCH v2 1/4] i2c: imx: only poll for bus busy in multi master mode
From: Fabio Estevam <festevam@xxxxxxxxx>
Date: Thu, 22 Aug 2024 09:59:39 -0300
Cc: o.rempel@xxxxxxxxxxxxxx, kernel@xxxxxxxxxxxxxx, andi.shyti@xxxxxxxxxx, shawnguo@xxxxxxxxxx, s.hauer@xxxxxxxxxxxxxx, Frank.Li@xxxxxxx, francesco.dolcini@xxxxxxxxxxx, linux-i2c@xxxxxxxxxxxxxxx, imx@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Stefan Eichenberger <stefan.eichenberger@xxxxxxxxxxx>
In-reply-to: <Zscl99sSlbhOTrnQ@eichest-laptop>
References: <20240819072052.8722-1-eichest@gmail.com> <20240819072052.8722-2-eichest@gmail.com> <CAOMZO5CYUNESmBdZBMSMwNraQbqvvsF5fn8i+nHr=MB_T_AG7w@mail.gmail.com> <CAOMZO5CeT+LvQ__3GUf6teL3=8pZe5qxmFffYJX-h3E27UXwtQ@mail.gmail.com> <Zscl99sSlbhOTrnQ@eichest-laptop>

Hi Stefan,

On Thu, Aug 22, 2024 at 8:50 AM Stefan Eichenberger <eichest@xxxxxxxxx> wrote:

> In your setup, do you know what mode (atomic, interrupt, dma) the driver
> uses when it works and when it fails?

On the imx8mp board I am testing, the very first I2C register write
done by the pca935x driver fails.

Thanks

References:
- [PATCH v2 0/4] i2c: imx: prevent rescheduling in non-dma mode
  - From: Stefan Eichenberger
- [PATCH v2 1/4] i2c: imx: only poll for bus busy in multi master mode
  - From: Stefan Eichenberger
- Re: [PATCH v2 1/4] i2c: imx: only poll for bus busy in multi master mode
  - From: Fabio Estevam
- Re: [PATCH v2 1/4] i2c: imx: only poll for bus busy in multi master mode
  - From: Fabio Estevam
- Re: [PATCH v2 1/4] i2c: imx: only poll for bus busy in multi master mode
  - From: Stefan Eichenberger

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