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    Subject[PATCH v3 1/3] dt-bindings: i2c: extend existing opencore bindings.
    Date
    Add FU540-C000 specific device tree bindings to already
    available i2-ocores file. This device is available on
    HiFive Unleashed Rev A00 board. Move interrupt and interrupt
    parents under optional property list as these can be optional.

    The FU540-C000 SoC from sifive, has an Opencore's I2C block
    reimplementation.

    The DT compatibility string for this IP is present in HDL and available at.
    https://github.com/sifive/sifive-blocks/blob/master/src/main/scala/devices/i2c/I2C.scala#L73

    Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@sifive.com>
    ---
    Documentation/devicetree/bindings/i2c/i2c-ocores.txt | 7 ++++++-
    1 file changed, 6 insertions(+), 1 deletion(-)

    diff --git a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
    index 17bef9a..b73960e 100644
    --- a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
    +++ b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
    @@ -2,8 +2,11 @@ Device tree configuration for i2c-ocores

    Required properties:
    - compatible : "opencores,i2c-ocores" or "aeroflexgaisler,i2cmst"
    + "sifive,fu540-c000-i2c" or "sifive,i2c0".
    + for Opencore based I2C IP block reimplemented in
    + FU540-C000 SoC.Please refer sifive-blocks-ip-versioning.txt
    + for additional details.
    - reg : bus address start and address range size of device
    -- interrupts : interrupt number
    - clocks : handle to the controller clock; see the note below.
    Mutually exclusive with opencores,ip-clock-frequency
    - opencores,ip-clock-frequency: frequency of the controller clock in Hz;
    @@ -12,6 +15,8 @@ Required properties:
    - #size-cells : should be <0>

    Optional properties:
    +- interrupt-parent: handle to interrupt controller.
    +- interrupts : interrupt number.
    - clock-frequency : frequency of bus clock in Hz; see the note below.
    Defaults to 100 KHz when the property is not specified
    - reg-shift : device register offsets are shifted by this value
    --
    1.9.1
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