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Add driver support for the UART routing control. Users can perform
runtime configuration of the RX muxes among the UART controllers and
the UART IO pins.
The sysfs interface is also exported for the convenience of routing paths
check and update.
Signed-off-by: Oskar Senft <[email protected]>
Signed-off-by: Chia-Wei Wang <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Tested-by: Lei YU <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]'
Signed-off-by: Arnd Bergmann <[email protected]>
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