linux-kernel - RE: [PATCH] driver core: platform: add device binding path 'driver

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Date:	Thu, 10 Apr 2014 20:03:15 +0000
From:	Stuart Yoder <stuart.yoder@...escale.com>
To:	Kim Phillips <Kim.Phillips@...escale.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"libvir-list@...hat.com" <libvir-list@...hat.com>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"tech@...tualopensystems.com" <tech@...tualopensystems.com>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Guenter Roeck <linux@...ck-us.net>,
	"christoffer.dall@...aro.org" <christoffer.dall@...aro.org>
Subject: RE: [PATCH] driver core: platform: add device binding path
 'driver_override'



> -----Original Message-----
> From: Kim Phillips [mailto:kim.phillips@...escale.com]
> Sent: Tuesday, April 08, 2014 8:47 PM
> To: Alex Williamson; gregkh@...uxfoundation.org
> Cc: bhelgaas@...gle.com; linux-pci@...r.kernel.org; kvm@...r.kernel.org;
> konrad.wilk@...cle.com; Yoder Stuart-B08248; libvir-list@...hat.com;
> iommu@...ts.linux-foundation.org; tech@...tualopensystems.com;
> kvmarm@...ts.cs.columbia.edu; linux-kernel@...r.kernel.org; Guenter
> Roeck; christoffer.dall@...aro.org
> Subject: [PATCH] driver core: platform: add device binding path
> 'driver_override'
> 
> Needed by platform device drivers, such as the vfio-platform driver [1],
> in order to bypass the existing OF, ACPI, id_table and name string
> matches,
> and successfully be able to be bound to any device, like so:
> 
> echo vfio-platform >
> /sys/bus/platform/devices/fff51000.ethernet/driver_override
> echo fff51000.ethernet >
> /sys/bus/platform/devices/fff51000.ethernet/driver/unbind
> echo fff51000.ethernet > /sys/bus/platform/drivers_probe
> 
> This mimics "PCI: Introduce new device binding path using
> pci_dev.driver_override" [2], which is an interface enhancement
> for more deterministic PCI device binding, e.g., when in the
> presence of hotplug.
> 
> [1] http://lkml.iu.edu/hypermail/linux/kernel/1402.1/00177.html
> [2] http://lists-archives.com/linux-kernel/28030441-pci-introduce-new-
> device-binding-path-using-pci_dev-driver_override.html
> 
> Suggested-by: Alex Williamson <alex.williamson@...hat.com>
> Signed-off-by: Kim Phillips <kim.phillips@...escale.com>
> ---

Reviewed-by: Stuart Yoder <stuart.yoder@...escale.com>
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