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

Hi Oleksij,

On Fri, Aug 23, 2024 at 04:04:58PM +0200, Oleksij Rempel wrote:

On Fri, Aug 23, 2024 at 03:48:32PM +0200, Stefan Eichenberger wrote:

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Hi Andi,

On Fri, Aug 23, 2024 at 02:35:54AM +0200, Andi Shyti wrote:

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Hi,

On Thu, Aug 22, 2024 at 12:04:43PM GMT, Oleksij Rempel wrote:

quoted

On Thu, Aug 22, 2024 at 09:03:55AM +0200, Stefan Eichenberger wrote:

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Hi Andi,

On Thu, Aug 22, 2024 at 12:21:30AM +0200, Andi Shyti wrote:

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Hi Stefan,

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@@ -1468,6 +1473,8 @@ static int i2c_imx_probe(struct platform_device *pdev)
 		goto rpm_disable;
 	}
 
+	i2c_imx->multi_master = of_property_read_bool(pdev->dev.of_node, "multi-master");
+

you might also want to add the multi-master boolean property in
the binding.

We discussed this internally and weren't sure when it was required
because e.g. i2c-rcar and i2c-tegra don't have it documented in their
bindings. Is it still required if it is part of the dt-schema?
https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/i2c/i2c-controller.yaml

The i2c-imx.yaml has "unevaluatedProperties: false", which fill discard
every thing not in this yaml

quoted

If so, I will add it in the next version.

Yes, please.

sorry for the confusion, please don't add it. I had a chat with
Krzysztof and I will quote him: "this is a core property, coming
with dtschema, so they dont need to update bindings".

He also sent a cleanup to remove the only binding using it.

No problem, thanks for the clarification. 

Should I still separate the multi-master patch from the rest of the
series, even though it doesn't seem to fix the problem Fabio sees? I did
some more testing today and the workarounds he found do not solve the
problem I see, so they are definitely not the same.

I'll try to review your DMA patches next week.

Perfect, thank you, no need to hurry.

Regards,
Stefan