]> git.karo-electronics.de Git - linux-beck.git/commit
of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()
authorLiviu Dudau <Liviu.Dudau@arm.com>
Mon, 29 Sep 2014 14:29:27 +0000 (15:29 +0100)
committerBjorn Helgaas <bhelgaas@google.com>
Tue, 30 Sep 2014 23:08:57 +0000 (17:08 -0600)
commit41e5c0f81d3e676d671d96a0a1fafb27abfbd9d7
tree674d5c5bc98998014d5b454f059bb052660057d5
parent670ba0c8883b576d0aec28bd7a838358a4be1406
of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()

Add pci_get_new_domain_nr() to allocate a new domain number and
of_get_pci_domain_nr() to retrieve the PCI domain number of a given device
from DT.  Host bridge drivers or architecture-specific code can choose to
implement their PCI domain number policy using these two functions.

Using of_get_pci_domain_nr() guarantees a stable PCI domain number on every
boot provided that all host bridge controllers are assigned a number in the
device tree using "linux,pci-domain" property.  Mixing use of
pci_get_new_domain_nr() and of_get_pci_domain_nr() is not recommended as it
can lead to potentially conflicting domain numbers being assigned to root
buses behind different host bridges.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Catalin Marinas <catalin.marinas@arm.com>
drivers/of/of_pci.c
drivers/pci/pci.c
include/linux/of_pci.h
include/linux/pci.h