On Wed, Sep 30, 2015 at 01:08:24PM +0100, Ivan T. Ivanov wrote: > 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.iva...@linaro.org> > --- > .../devicetree/bindings/serial/qcom,msm-uartdm.txt | 3 + > drivers/tty/serial/msm_serial.c | 312 > +++++++++++++++++++-- > drivers/tty/serial/msm_serial.h | 3 + > 3 files changed, 294 insertions(+), 24 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.
This sounds like it belongs in the dma-specifier, and dealt with by the DMA controller driver. Why does the UART driver need to know about this? Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
