of/pci: Add of_pci_get_max_link_speed() to parse max-link-speed from DT
authorShawn Lin <shawn.lin@rock-chips.com>
Mon, 14 Nov 2016 21:21:14 +0000 (15:21 -0600)
committerBjorn Helgaas <bhelgaas@google.com>
Mon, 14 Nov 2016 21:21:14 +0000 (15:21 -0600)
commit9a1dc3891255afd836f355b117fd6b975d0b1eb2
treee32a27ec04397d4d767342be5ad721cfb57fb91e
parent2fa39159b6a9931d6fd82ecbe65357e0ad77e1a4
of/pci: Add of_pci_get_max_link_speed() to parse max-link-speed from DT

This new helper function could be used by host drivers to get the limitaion
of max link speed provided by DT.  If the property isn't assigned or is
invalid, it will return -EINVAL to the caller.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
drivers/of/of_pci.c
include/linux/of_pci.h