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authorVineet Gupta <Vineet.Gupta1@synopsys.com>2013-01-11 11:50:23 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-15 22:16:05 -0800
commitea28fd56fcde69af768135e428093f94c5ca6a88 (patch)
treee9f834f511507ded2c43beaf3d00a0227d77c519 /Documentation
parentd6c0d06b341803fde45e592df4233579f3afb04e (diff)
downloadop-kernel-dev-ea28fd56fcde69af768135e428093f94c5ca6a88.zip
op-kernel-dev-ea28fd56fcde69af768135e428093f94c5ca6a88.tar.gz
serial/arc-uart: switch to devicetree based probing
* DT binding for arc-uart * With alll the bits in place we can now use DT probing. Note that there's a bit of kludge right now because earlyprintk portion of driver can't use the DT infrastrcuture to get resoures/plat_data. This requires some infrastructre changes to of_flat_ framework Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@linux.intel.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: Rob Herring <rob.herring@calxeda.com> Cc: Rob Landley <rob@landley.net> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/tty/serial/arc-uart.txt26
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/arc-uart.txt b/Documentation/devicetree/bindings/tty/serial/arc-uart.txt
new file mode 100644
index 0000000..c3bd8f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/tty/serial/arc-uart.txt
@@ -0,0 +1,26 @@
+* Synopsys ARC UART : Non standard UART used in some of the ARC FPGA boards
+
+Required properties:
+- compatible : "snps,arc-uart"
+- reg : offset and length of the register set for the device.
+- interrupts : device interrupt
+- clock-frequency : the input clock frequency for the UART
+- baud : baud rate for UART
+
+e.g.
+
+arcuart0: serial@c0fc1000 {
+ compatible = "snps,arc-uart";
+ reg = <0xc0fc1000 0x100>;
+ interrupts = <5>;
+ clock-frequency = <80000000>;
+ baud = <115200>;
+ status = "okay";
+};
+
+Note: Each port should have an alias correctly numbered in "aliases" node.
+
+e.g.
+aliases {
+ serial0 = &arcuart0;
+};
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