diff options
| author | Wilson Ding <dingwei@marvell.com> | 2016-02-16 21:14:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-08 03:11:14 +0300 |
| commit | 30530791a7a032dc27dbbab56b8afabd5138074c (patch) | |
| tree | d1a5505aea2f2b173e841cf34a6b3471db38e615 /Documentation | |
| parent | 82a3f87f6e80e0bf7978152021eb8938976721cb (diff) | |
| download | linux-30530791a7a032dc27dbbab56b8afabd5138074c.tar.xz | |
serial: mvebu-uart: initial support for Armada-3700 serial port
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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/tty/serial/mvebu-uart.txt | 13 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 6 |
2 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/tty/serial/mvebu-uart.txt new file mode 100644 index 000000000000..6087defd9f93 --- /dev/null +++ b/Documentation/devicetree/bindings/tty/serial/mvebu-uart.txt @@ -0,0 +1,13 @@ +* Marvell UART : Non standard UART used in some of Marvell EBU SoCs (e.g., Armada-3700) + +Required properties: +- compatible: "marvell,armada-3700-uart" +- reg: offset and length of the register set for the device. +- interrupts: device interrupt + +Example: + serial@12000 { + compatible = "marvell,armada-3700-uart"; + reg = <0x12000 0x400>; + interrupts = <43>; + }; diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 9a53c929f017..1ffa9dba13fd 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1058,6 +1058,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. A valid base address must be provided, and the serial port must already be setup and configured. + armada3700_uart,<addr> + Start an early, polled-mode console on the + Armada 3700 serial port at the specified + address. The serial port must already be setup + and configured. Options are not yet supported. + earlyprintk= [X86,SH,BLACKFIN,ARM,M68k] earlyprintk=vga earlyprintk=efi |