lkml.org 
[lkml]   [2019]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 4/5] dt-bindings: serial: sprd: Add dma properties to support DMA mode
On Tue, Feb 19, 2019 at 03:31:14PM +0800, Baolin Wang wrote:
> From: Lanqing Liu <lanqing.liu@unisoc.com>
>
> 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>
> ---
> .../devicetree/bindings/serial/sprd-uart.txt | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt b/Documentation/devicetree/bindings/serial/sprd-uart.txt
> index 6eb5863..9ac28f6 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 "tx" for transmit and "rx" for receive channels.

The order here doesn't match the example.

> +- 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 19>, <&ap_dma 20 20>;
> clock-names = "enable", "uart", "source";
> clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>;
> };
> --
> 1.7.9.5
>

\
 
 \ /
  Last update: 2019-02-28 20:53    [W:0.051 / U:36.440 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site