diff options
author | John Linn <john.linn@xilinx.com> | 2008-04-03 10:22:19 +1100 |
---|---|---|
committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2008-04-24 13:32:46 -0500 |
commit | b912b5e2cfb35c02c9c79d3f6e31753f3be4dd83 (patch) | |
tree | f9b09696b097dc85cb69d0b28c321cdc92c6afe4 /Documentation | |
parent | 2f0b45f846735b486c0383740d3959941c4721a4 (diff) | |
download | op-kernel-dev-b912b5e2cfb35c02c9c79d3f6e31753f3be4dd83.zip op-kernel-dev-b912b5e2cfb35c02c9c79d3f6e31753f3be4dd83.tar.gz |
[POWERPC] Xilinx: of_serial support for Xilinx uart 16550.
The Xilinx 16550 uart core is not a standard 16550 because it uses
word-based addressing rather than byte-based addressing. With
additional properties it is compatible with the open firmware
'ns16550' compatible binding.
This code updates the of_serial driver to handle the reg-offset
and reg-shift properties to enable this core to be used.
Signed-off-by: John Linn <john.linn@xilinx.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/powerpc/booting-without-of.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt index 4cc7800..cf89e8c 100644 --- a/Documentation/powerpc/booting-without-of.txt +++ b/Documentation/powerpc/booting-without-of.txt @@ -2601,6 +2601,17 @@ platforms are moved over to use the flattened-device-tree model. differ between different families. May be 'virtex2p', 'virtex4', or 'virtex5'. + vi) Xilinx Uart 16550 + + Xilinx UART 16550 devices are very similar to the NS16550 but with + different register spacing and an offset from the base address. + + Requred properties: + - clock-frequency : Frequency of the clock input + - reg-offset : A value of 3 is required + - reg-shift : A value of 2 is required + + p) Freescale Synchronous Serial Interface The SSI is a serial device that communicates with audio codecs. It can |