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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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