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861ac52a7e
tbz check for RDR status is to check for a bit being zero. Unfortunately, we are using a mask rather than the bit position. Further as per http://www.ti.com/lit/ds/symlink/pc16550d.pdf (page 17), LSR register bit 0 is Data ready status (RDR), not bit position 2. Update the same to match the specification. Reported-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com>