linux-kernel - [PATCH v2 v2 1/3] dt-bindings: i2c: extend existing opencore bindings.

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Message-Id: <1557242108-13580-2-git-send-email-sagar.kadam@sifive.com>
Date:   Tue,  7 May 2019 20:45:06 +0530
From:   Sagar Shrikant Kadam <sagar.kadam@...ive.com>
To:     robh+dt@...nel.org, mark.rutland@....com, peter@...sgaard.com,
        andrew@...n.ch, palmer@...ive.com, paul.walmsley@...ive.com,
        sagar.kadam@...ive.com, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 v2 1/3] dt-bindings: i2c: extend existing opencore bindings.

Add FU540-C000 specific device tree bindings to already
available i2-ocores file. This device is available on
HiFive Unleashed Rev A00 board.

Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@...ive.com>
---
 Documentation/devicetree/bindings/i2c/i2c-ocores.txt | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
index 17bef9a..f6bcf90 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
@@ -2,6 +2,7 @@ Device tree configuration for i2c-ocores
 
 Required properties:
 - compatible      : "opencores,i2c-ocores" or "aeroflexgaisler,i2cmst"
+                    "sifive,fu540-c000-i2c" or "sifive,i2c0"
 - reg             : bus address start and address range size of device
 - interrupts      : interrupt number
 - clocks          : handle to the controller clock; see the note below.
@@ -67,3 +68,22 @@ or
 			reg = <0x60>;
 		};
 	};
+or
+	/*
+	  An Opencore based I2C node in FU540-C000 chip from SiFive
+	  This chip has a hardware erratum for broken IRQ
+	  so it's recommended not to define interrupt in the device node
+	*/
+	i2c@...30000 {
+			compatible = "sifive,i2c0","sifive,fu540-c000-i2c";
+			reg = <0x0 0x10030000 0x0 0x1000>;
+			reg-names = "i2c-control";
+			clocks = <&tlclk>;
+			clock-frequency = <100000>;
+
+			reg-shift = <2>;
+			reg-io-width = <1>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+	};
-- 
1.9.1


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