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ARM: 8256/1: driver coamba: add device binding path 'driver_override'

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As already demonstrated with PCI [1] and the platform bus [2], a
driver_override property in sysfs can be used to bypass the id
matching of a device to a AMBA driver. This can be used by VFIO to
bind to any AMBA device requested by the user.

[1] http://lists-archives.com/linux-kernel/28030441-pci-introduce-new-device-binding-path-using-pci_dev-driver_override.html
[2] https://www.redhat.com/archives/libvir-list/2014-April/msg00382.html

Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Reviewed-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Antonios Motakis 2015-01-06 11:15:11 +01:00 • committed by Russell King
parent 8684014d71
commit 3cf3857134
3 changed files with 68 additions and 0 deletions
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1
include/linux/amba/bus.h
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@ -33,6 +33,7 @@ struct amba_device {
struct clk *pclk;
unsigned int periphid;
unsigned int irq[AMBA_NR_IRQS];
char *driver_override;
};
struct amba_driver {