linux-kernel - Re: [PATCH 6/6] spi: octeon: Add thunderx driver

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Date:	Mon, 25 Jul 2016 17:16:32 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Jan Glauber <jan.glauber@...iumnetworks.com>
Cc:	linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
	"Steven J. Hill" <steven.hill@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH 6/6] spi: octeon: Add thunderx driver

On Mon, Jul 25, 2016 at 05:51:22PM +0200, Jan Glauber wrote:
> On Sun, Jul 24, 2016 at 10:04:52PM +0100, Mark Brown wrote:
> > On Sat, Jul 23, 2016 at 12:42:55PM +0200, Jan Glauber wrote:

> > > +	depends on 64BIT && PCI && !CAVIUM_OCTEON_SOC

> > This is a *weird* and most likely broken set of dependencies - why
> > exclude this if we're on Octeon (or Octeon happens to have been enabled
> > in a config)?

> I agree that it looks weird, the reasoning is that we would like
> to avoid making the driver depend on something like ARCH_THUNDER.

Why?

> So I made the driver depend on the things it actually uses
> (PCI for probing and 64BIT because of readq/writeq) and don't care if it
> compiles on other platforms too (like x86).

The usual pattern would be something like (ARCH_THUNDER || COMPILE_TEST)
&& PCI && 64BIT (so that people on other platforms where the device will
never actually appear don't get bothered by the prompt).

> That said, I can remove the !CAVIUM_OCTEON_SOC, it compiles without
> errors on MIPS too. Would that be ok?

Sure.

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