serial: pl011: Add device tree support for RX DMA polling

Add equivalent attributes to those provided in the platform data
for use when RX DMA is enabled.

Signed-off-by: Andrew Jackson <Andrew.Jackson@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 12 insertions, 7 deletions

diff --git a/Documentation/devicetree/bindings/serial/pl011.txt b/Documentation/devicetree/bindings/serial/pl011.txt
index 5d2e840ae65c..0e05340055e1 100644
--- a/Documentation/devicetree/bindings/serial/pl011.txt
+++ b/Documentation/devicetree/bindings/serial/pl011.txt
@@ -6,12 +6,17 @@ Required properties:
 - interrupts: exactly one interrupt specifier
 
 Optional properties:
-- pinctrl: When present, must have one state named "sleep"
-           and one state named "default"
-- clocks:  When present, must refer to exactly one clock named
-           "apb_pclk"
-- dmas:    When present, may have one or two dma channels.
-           The first one must be named "rx", the second one
-           must be named "tx".
+- pinctrl:              When present, must have one state named "sleep"
+                        and one state named "default"
+- clocks:               When present, must refer to exactly one clock named
+                        "apb_pclk"
+- dmas:                 When present, may have one or two dma channels.
+                        The first one must be named "rx", the second one
+                        must be named "tx".
+- auto-poll:            Enables polling when using RX DMA.
+- poll-rate-ms:         Rate at which poll occurs when auto-poll is set,
+                        default 100ms.
+- poll-timeout-ms:      Poll timeout when auto-poll is set, default
+                        3000ms.
 
 See also bindings/arm/primecell.txt