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2018-07-21dt: serial: Add Renesas RZ/N1 binding documentationPhil Edworthy1-0/+10
The RZ/N1 UART is a modified Synopsys DesignWare UART. The modifications only relate to DMA so you could actually use the controller with the Synopsys compatible string if you are not using DMA, but you should not do so. Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>