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dt-bindings: i2c: extend existing opencore bindings
Reformatted compatibility strings to one valid combination on each line. 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 under optional property list as this 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> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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@ -1,9 +1,13 @@
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Device tree configuration for i2c-ocores
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Required properties:
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- compatible : "opencores,i2c-ocores" or "aeroflexgaisler,i2cmst"
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- compatible : "opencores,i2c-ocores"
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"aeroflexgaisler,i2cmst"
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"sifive,fu540-c000-i2c", "sifive,i2c0"
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For Opencore based I2C IP block reimplemented in
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FU540-C000 SoC. Please refer to sifive-blocks-ip-versioning.txt
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for additional details.
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- reg : bus address start and address range size of device
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- interrupts : interrupt number
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- clocks : handle to the controller clock; see the note below.
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Mutually exclusive with opencores,ip-clock-frequency
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- opencores,ip-clock-frequency: frequency of the controller clock in Hz;
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@ -12,6 +16,7 @@ Required properties:
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- #size-cells : should be <0>
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Optional properties:
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- interrupts : interrupt number.
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- clock-frequency : frequency of bus clock in Hz; see the note below.
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Defaults to 100 KHz when the property is not specified
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- reg-shift : device register offsets are shifted by this value
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