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serial: mvebu-uart: initial support for Armada-3700 serial port

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Armada-3700's uart is a simple serial port, which doesn't
support. Configuring the modem control lines. The uart port has a 32
bytes Tx FIFO and a 64 bytes Rx FIFO

The uart driver implements the uart core operations. It also support the
system (early) console based on Armada-3700's serial port.

Known Issue:

The uart driver currently doesn't support clock programming, which means
the baud-rate stays with the default value configured by the bootloader
at boot time

[gregory.clement@free-electrons.com: Rewrite many part which are too long
to enumerate]

Signed-off-by: Wilson Ding <dingwei@marvell.com>
Signed-off-by: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wilson Ding 2016-02-16 19:14:53 +01:00 • committed by Greg Kroah-Hartman
parent 82a3f87f6e
commit 30530791a7
6 changed files with 695 additions and 0 deletions
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3
include/uapi/linux/serial_core.h
View file

@ -261,4 +261,7 @@
/* STM32 USART */
#define PORT_STM32 113
/* MVEBU UART */
#define PORT_MVEBU 114
#endif /* _UAPILINUX_SERIAL_CORE_H */