iommu/ipmmu-vmsa: r8a7795 support V5 [PATCH v5 01/09] iommu/ipmmu-vmsa: Introduce features, break out alias [PATCH v5 02/09] iommu/ipmmu-vmsa: Add optional root device feature [PATCH v5 03/09] iommu/ipmmu-vmsa: Enable multi context support [PATCH v5 04/09] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE() [PATCH v5 05/09] iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master [PATCH v5 06/09] iommu/ipmmu-vmsa: Write IMCTR twice [PATCH v5 07/09] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional [PATCH v5 08/09] iommu/ipmmu-vmsa: Allow two bit SL0 [PATCH v5 09/09] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code This is V5 of r8a7795 IPMMU driver where the series has been rebased and reworked to fit on next-20171013 that includes: [PATCH v2 00/05] iommu/ipmmu-vmsa: 32-bit ARM update V2 [PATCH] iommu/ipmmu-vmsa: Use iommu_device_sysfs_add()/remove() The major feature change is in patch 2/9 that now gets by without using a local list of registered IPMMU devices and instead relies on driver_for_each_device(). Thanks to Robin Murphy for his support. The DT binding for r8a7795 has been accepted for upstream merge and this series implements support following such format: d4e42e7 iommu/ipmmu-vmsa: Add r8a7795 DT binding The r8a7795 IPMMU is almost register compatible with earlier devices like r8a7790-r8a7794, however some bitfields have been shifted slightly. On a grander scale topology has been added and interrupts have been reworked. So now there are several "cache" IPMMU units without interrupt that somehow communicate with IPMMU-MM that is the only instance that supports interrupts. The code refers to IPMMU-MM as a "root" device and the other ones as "leaf" nodes. Changes since V4: - Rebased on top of [PATCH v2 00/05] iommu/ipmmu-vmsa: 32-bit ARM update V2 - Reworked root device handling to make use of driver_for_each_device() - Added deferred probing to make sure root device always is present Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> --- Developed on top of next-20171013 Also applies to renesas-drivers-2017-10-03-v4.14-rc3 Tested on top of renesas-drivers on r8a7796-m3ulcb using /dev/ttySC1 - [PATCH v4 0/3] iommu/ipmmu-vmsa: r8a7796 support V4 - local /dev/ttySC1 enablement for testing purpose - local DTS changes to hook up SYS-DMAC and IPMMU DS0, DS1 and MM - local whitelist code to enable "e7310000.dma-controller" drivers/iommu/ipmmu-vmsa.c | 310 ++++++++++++++++++++++++++++++++++---------- 1 file changed, 244 insertions(+), 66 deletions(-)
