Phil Elwell <phil@xxxxxxxxxxxxxxx> writes: > The AUX/mini-UART in the BCM2835 family of procesors is a cut-down > 8250 clone. In particular it is lacking support for the following > features: CSTOPB PARENB PARODD CMSPAR CS5 CS6 > > Add a new capability (UART_CAP_MINI) that exposes the restrictions to > the user of the termios API by turning off the unsupported features in > the request. > > N.B. It is almost possible to automatically discover the missing > features by reading back the LCR register, but the CSIZE bits don't > cooperate (contrary to the documentation, both bits are significant, > but CS5 and CS6 are mapped to CS7) and the code is much longer. > > See: https://github.com/raspberrypi/linux/issues/1561 > > Signed-off-by: Phil Elwell <phil@xxxxxxxxxxxxxxx> Acked-by: Eric Anholt <eric@xxxxxxxxxx>
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