linux-kernel - Re: [PATCH 2/3] spi / ACPI: add ACPI enumeration support

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Message-ID: <20121105105639.GE1385@opensource.wolfsonmicro.com>
Date:	Mon, 5 Nov 2012 11:56:39 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-kernel@...r.kernel.org, lenb@...nel.org,
	rafael.j.wysocki@...el.com, grant.likely@...retlab.ca,
	linus.walleij@...aro.org, khali@...ux-fr.org, ben-linux@...ff.org,
	w.sang@...gutronix.de, mathias.nyman@...ux.intel.com,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 2/3] spi / ACPI: add ACPI enumeration support

On Mon, Nov 05, 2012 at 12:56:02PM +0200, Mika Westerberg wrote:

> > struct acpi_device {
> > 	...
> > 	union acpi_resource_serial_bus *serial;
> > 	...
> > };

> It is also possible to have several serial bus connectors on a single
> device (although we've seen only one connector per device but it should not
> be limited to that).

I've got practical systems where there are multiple buses physically
connected, though in practice almost always only one is actually used at
runtime when it's I2C and SPI there are some systems (usually with other
buses) where you might want to use more than one bus.  Not sure those
buses will fit in here though.

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