From 787b0c1f8e1975157fe73104e67cac18f955281b Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 28 Jan 2013 16:24:37 +0000 Subject: 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 Acked-by: Grant Likely Acked-by: Greg Kroah-Hartman Cc: Russell King Cc: Jiri Slaby Cc: Viresh Kumar Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org --- Documentation/devicetree/bindings/serial/pl011.txt | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 Documentation/devicetree/bindings/serial/pl011.txt (limited to 'Documentation/devicetree/bindings/serial') diff --git a/Documentation/devicetree/bindings/serial/pl011.txt b/Documentation/devicetree/bindings/serial/pl011.txt new file mode 100644 index 000000000000..5d2e840ae65c --- /dev/null +++ b/Documentation/devicetree/bindings/serial/pl011.txt @@ -0,0 +1,17 @@ +* 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 -- cgit v1.2.3