On Fri, Sep 11, 2020 at 12:16:43AM -0700, Nicolin Chen wrote: > There can be clients using the same swgroup in DT, for example i2c0 > and i2c1. The current driver will add them to separate IOMMU groups, > though it has implemented device_group() callback which is to group > devices using different swgroups like DC and DCB. > > All clients having the same swgroup should be also added to the same > IOMMU group so as to share an asid. Otherwise, the asid register may > get overwritten every time a new device is attached. > > Signed-off-by: Nicolin Chen <nicoleotsuka@xxxxxxxxx> > --- > drivers/iommu/tegra-smmu.c | 11 +++++++---- > 1 file changed, 7 insertions(+), 4 deletions(-) Makes sense: Acked-by: Thierry Reding <treding@xxxxxxxxxx>
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