From mboxrd@z Thu Jan 1 00:00:00 1970 From: robh@kernel.org (Rob Herring) Date: Fri, 27 Jan 2017 16:03:57 -0600 Subject: [PATCH V6 3/5] OF: Add missing I/O range exception for indirect-IO devices In-Reply-To: <1485241525-201782-4-git-send-email-yuanzhichang@hisilicon.com> References: <1485241525-201782-1-git-send-email-yuanzhichang@hisilicon.com> <1485241525-201782-4-git-send-email-yuanzhichang@hisilicon.com> Message-ID: <20170127220357.3lpavvyeymlhvlfg@rob-hp-laptop> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 > Signed-off-by: Gabriele Paoloni > Signed-off-by: Arnd Bergmann Shouldn't this be Reviewed-by? Otherwise, looks fine to me. Acked-by: Rob Herring > --- > drivers/of/address.c | 87 ++++++++++++++++++++++++++++++++++++++++++---------- > 1 file changed, 71 insertions(+), 16 deletions(-) >