On Tue, Jan 24, 2017 at 03:05:23PM +0800, zhichang.yuan wrote:

There are some special ISA/LPC devices that work on a specific I/O range where
it is not correct to specify a 'ranges' property in DTS parent node as cpu
addresses translated from DTS node are only for memory space on some
architectures, such as Arm64. Without the parent 'ranges' property, current
of_translate_address() return an error.
Here we add special handlings for this case.
During the OF address translation, some checkings will be perfromed to
identify whether the device node is registered as indirect-IO. If yes, the I/O
translation will be done in a different way from that one of PCI MMIO.
In this way, the I/O 'reg' property of the special ISA/LPC devices will be
parsed correctly.

Signed-off-by: zhichang.yuan <redacted>
Signed-off-by: Gabriele Paoloni <redacted>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Shouldn't this be Reviewed-by?

Otherwise, looks fine to me.

Acked-by: Rob Herring <robh@kernel.org>

---
 drivers/of/address.c | 87 ++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 71 insertions(+), 16 deletions(-)