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| author | Bhupesh Sharma <bhupesh.sharma@freescale.com> | 2015-01-25 02:42:49 +0530 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2015-01-27 15:03:41 -0800 |
| commit | ce4ee5806f15d171be4ba7f54d01fedb49baea66 (patch) | |
| tree | df86fb79dee13cec59758092029e631a2f2406ba /Documentation | |
| parent | 58f1fdea0b059c9cc8a3cb76109e6e0bf313e304 (diff) | |
| download | op-kernel-dev-ce4ee5806f15d171be4ba7f54d01fedb49baea66.zip op-kernel-dev-ce4ee5806f15d171be4ba7f54d01fedb49baea66.tar.gz | |
Documentation: DT: Add bindings for FSL NS16550A UART
This patch addss the device-tree documentation for Freescale's
NS16550 UART (also called DUART).
There is a specific errata fix required in FSL NS16550 UART
which ensures that an random interrupt storm is not observed when
a break is provided as an input to the UART.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/of-serial.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/of-serial.txt index b52b982..93e249c 100644 --- a/Documentation/devicetree/bindings/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/serial/of-serial.txt @@ -16,6 +16,7 @@ Required properties: - "altr,16550-FIFO64" - "altr,16550-FIFO128" - "fsl,16550-FIFO64" + - "fsl,ns16550" - "serial" if the port type is unknown. - reg : offset and length of the register set for the device. - interrupts : should contain uart interrupt. @@ -40,6 +41,17 @@ Optional properties: driver is allowed to detect support for the capability even without this property. +Note: +* fsl,ns16550: + ------------ + Freescale DUART is very similar to the PC16552D (and to a + pair of NS16550A), albeit with some nonstandard behavior such as + erratum A-004737 (relating to incorrect BRK handling). + + Represents a single port that is compatible with the DUART found + on many Freescale chips (examples include mpc8349, mpc8548, + mpc8641d, p4080 and ls2085a). + Example: uart@80230000 { |
