• Suman Anna's avatar
    iommu/omap: Add support for configuring dsp iommus on DRA7xx · 3ca9299e
    Suman Anna authored
    The DSP MMUs on DRA7xx SoC requires configuring an additional
    MMU_CONFIG register present in the DSP_SYSTEM sub module. This
    setting dictates whether the DSP Core's MDMA and EDMA traffic
    is routed through the respective MMU or not. Add the support
    to the OMAP iommu driver so that the traffic is not bypassed
    when enabling the MMUs.
    
    The MMU_CONFIG register has two different bits for enabling
    each of these two MMUs present in the DSP processor sub-system
    on DRA7xx. An id field is added to the OMAP iommu object to
    identify and enable each IOMMU. The id information and the
    DSP_SYSTEM.MMU_CONFIG register programming is achieved through
    the processing of the optional "ti,syscon-mmuconfig" property.
    A proper value is assigned to the id field only when this
    property is present.
    Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
    Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
    3ca9299e
omap-iommu.c 29.5 KB