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dt-bindings: serial: sprd: Add dma properties to support DMA mode 

This patch adds dmas and dma-names properties for the UART DMA mode.

Signed-off-by: Lanqing Liu <lanqing.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lanqing Liu 2019-03-04 16:58:23 +08:00 committed by Greg Kroah-Hartman
parent 4007098f4c
commit 083206100d
1 changed files with 6 additions and 0 deletions
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6
Documentation/devicetree/bindings/serial/sprd-uart.txt
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@ -15,12 +15,18 @@ Required properties:
UART clock and source clock are optional properties, but enable clock
is required.
Optional properties:
- dma-names: Should contain "rx" for receive and "tx" for transmit channels.
- dmas: A list of dma specifiers, one for each entry in dma-names.
Example:
uart0: serial@0 {
compatible = "sprd,sc9860-uart",
"sprd,sc9836-uart";
reg = <0x0 0x100>;
interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
dma-names = "rx", "tx";
dmas = <&ap_dma 19>, <&ap_dma 20>;
clock-names = "enable", "uart", "source";
clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>;
};