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    Subject[PATCH 02/11] dt: bindings: add AXD Audio Processing IP binding document
    Date
    Add device tree support for AXD Audio Processing IP

    Signed-off-by: Qais Yousef <qais.yousef@imgtec.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Rob Herring <robh+dt@kernel.org>
    Cc: Pawel Moll <pawel.moll@arm.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
    Cc: Kumar Gala <galak@codeaurora.org>
    Cc: <devicetree@vger.kernel.org>
    Cc: <alsa-devel@alsa-project.org>
    ---
    Documentation/devicetree/bindings/axd.txt | 39 +++++++++++++++++++++++++++++++
    1 file changed, 39 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/axd.txt

    diff --git a/Documentation/devicetree/bindings/axd.txt b/Documentation/devicetree/bindings/axd.txt
    new file mode 100644
    index 000000000000..694fc40613fb
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/axd.txt
    @@ -0,0 +1,39 @@
    +* AXD Audio Processing IP Binding *
    +
    +Required properties:
    +- compatible: "img,axd"
    +- clocks: phandle for the clock that drives AXD.
    +- interrupts: the GIC interrupt where AXD is connected or software interrupt
    + 1 (not recommended).
    +
    +Optional properties:
    +- gic-irq: it takes two non-zero values, the first one is the host hwirq and
    + the second one is axd's. Host's hwirq should match the value in
    + interrupts.
    + If not using GIC, then axd will revert to using software interrupt 1
    + which is a fallback mechanism for systems without GIC. It is
    + recommended to use GIC whenever possible. Some systems will only work
    + with GIC so this property will not be optional then.
    +- vpe: VPE number on which axd should start. Must be provided if axd is
    + running as a single VPE along Linux on the same core.
    + It can't be VPE0.
    + The VPE must be offlined by Linux before axd is loaded.
    +- inbuf-size: size of shared input buffers area. by default it's 0x7800 bytes.
    +- outbuf-size: size of shared output buffers area. by default it's 0x3c000 bytes.
    +
    +
    +Example:
    +
    + axdclk: axdclk@400M {
    + #clock-cells = <0>;
    + compatible = "fixed-clock";
    + clock-frequency = <400000000>;
    + };
    +
    + axd: axd@07800000 {
    + compatible = "img,axd";
    + clocks = <&axdclk>;
    + interrupts = <36 IRQ_TYPE_EDGE_RISING>
    + gic-irq = <36 37>;
    + vpe = <1>;
    + };
    --
    2.1.0


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