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From:   Sagar Shrikant Kadam <sagar.kadam@sifive.com>
To:     robh+dt@kernel.org, mark.rutland@arm.com, peter@korsgaard.com,
        andrew@lunn.ch, palmer@sifive.com, paul.walmsley@sifive.com,
        sagar.kadam@sifive.com, linux-i2c@vger.kernel.org,
        devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v5 1/3] dt-bindings: i2c: extend existing opencore bindings.
Date:   Mon, 20 May 2019 19:41:16 +0530
Message-Id: <1558361478-4381-2-git-send-email-sagar.kadam@sifive.com>
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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