path: root/Documentation/devicetree/bindings/serial
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authorArnd Bergmann <arnd@arndb.de>2013-01-28 16:24:37 (GMT)
committerArnd Bergmann <arnd@arndb.de>2013-03-12 16:56:09 (GMT)
commit787b0c1f8e1975157fe73104e67cac18f955281b (patch)
tree4668c8a2a16baec67e71844840b85bea03cb5566 /Documentation/devicetree/bindings/serial
parentdc715452e9145156840b09df765ea2ede4851eda (diff)
serial: pl011: use generic DMA slave configuration if possible
With the new OF DMA binding, it is possible to completely avoid the need for platform_data for configuring a DMA channel. In cases where the platform has already been converted, calling dma_request_slave_channel should get all the necessary information from the device tree. This also adds a binding document specific to the pl011 controller, and extends the generic primecell binding to mention "dmas" and other common properties. Like the patch that converts the dw_dma controller, this is completely untested and is looking for someone to try it out. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org
Diffstat (limited to 'Documentation/devicetree/bindings/serial')
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/pl011.txt b/Documentation/devicetree/bindings/serial/pl011.txt
new file mode 100644
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+++ b/Documentation/devicetree/bindings/serial/pl011.txt
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+* ARM AMBA Primecell PL011 serial UART
+Required properties:
+- compatible: must be "arm,primecell", "arm,pl011"
+- reg: exactly one register range with length 0x1000
+- 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".
+See also bindings/arm/primecell.txt

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