diff options
| author | Lanqing Liu <lanqing.liu@unisoc.com> | 2019-03-04 16:58:23 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-28 00:30:00 +0900 |
| commit | 083206100d971b457dc6a942748bdb3ccc72c947 (patch) | |
| tree | 75f3136b9fe2bc140f8749437a495076eb2837cb /Documentation/devicetree/bindings/serial | |
| parent | 4007098f4ce46c87c16ba34ddc00b042aa444b59 (diff) | |
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>
Diffstat (limited to 'Documentation/devicetree/bindings/serial')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/sprd-uart.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt b/Documentation/devicetree/bindings/serial/sprd-uart.txt index 6eb5863aa548..9607dc616205 100644 --- a/Documentation/devicetree/bindings/serial/sprd-uart.txt +++ b/Documentation/devicetree/bindings/serial/sprd-uart.txt @@ -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>; }; |