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| author | Ivan T. Ivanov <ivan.ivanov@linaro.org> | 2015-09-30 15:27:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 21:15:17 +0300 |
| commit | 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 (patch) | |
| tree | 6a91f4868bb0ad152ea16c5c2ec940f75c0aa68b /Documentation | |
| parent | 558abdb05fe0c7fc86eba8803d74bc9592c3cb26 (diff) | |
| download | linux-3a878c430fd6eb4f8587f9ebd187f773bf85d1d6.tar.xz | |
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 <ivan.ivanov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt | 3 |
1 files changed, 3 insertions, 0 deletions
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 <u32> 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 |