linux-kernel - Re: [PATCH] spi: qup: provide proper bus numbers

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Message-ID: <20160121183810.GN6588@sirena.org.uk>
Date:	Thu, 21 Jan 2016 18:38:10 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	Andy Gross <andy.gross@...aro.org>, linux-spi@...r.kernel.org,
	David Brown <david.brown@...aro.org>,
	linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: qup: provide proper bus numbers

On Thu, Jan 21, 2016 at 06:33:47PM +0000, Srinivas Kandagatla wrote:

> This driver reuses pdev->id for spi bus numbers resulting in random
> or very large bus numbering when used with device trees. pdev->id
> is not the correct choice when using device trees. So add code to

What makes you say this, why is pdev->id not "correct"?  It is worrying
if anything cares what number we pick.

> get bus numbers via device tree aliases and if it fails then generate
> a unique bus number.

The other question is even if this is a good idea why is it something
that should be open coded in individual drivers, if we want to change
the policy we should be consistent between drivers.

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