From 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 Mon Sep 17 00:00:00 2001 From: "Ivan T. Ivanov" Date: Wed, 30 Sep 2015 15:27:01 +0300 Subject: tty: serial: msm: Add TX DMA support Add transmit DMA support for UARTDM type of controllers. Tested on APQ8064, which have UARTDM v1.3 and ADM DMA engine and APQ8016, which have UARTDM v1.4 and BAM DMA engine. Signed-off-by: Ivan T. Ivanov Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation/devicetree/bindings/serial') diff --git a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt index a2114c217376..a600023d9ec1 100644 --- a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt +++ b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt @@ -26,6 +26,9 @@ Required properties: Optional properties: - dmas: Should contain dma specifiers for transmit and receive channels - dma-names: Should contain "tx" for transmit and "rx" for receive channels +- qcom,tx-crci: Identificator for Client Rate Control Interface to be + used with TX DMA channel. Required when using DMA for transmission + with UARTDM v1.3 and bellow. Note: Aliases may be defined to ensure the correct ordering of the UARTs. The alias serialN will result in the UART being assigned port N. If any -- cgit v1.2.3