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Date: Thu, 14 Feb 2019 09:57:20 -0800 From: Ray Jui <ray.jui@...adcom.com> To: Wolfram Sang <wsa@...-dreams.de>, Rob Herring <robh+dt@...nel.org>, Mark Rutland <mark.rutland@....com> Cc: linux-i2c@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com, Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>, Ray Jui <ray.jui@...adcom.com> Subject: [PATCH v5 3/8] dt-bindings: i2c: iproc: make 'interrupts' optional Update the binding document to make the 'interrupts' property optional. For certain revisions of the I2C controller (e.g., iProc NIC I2C), I2C interrupt is unwired to the interrupt controller. In such case, this 'interrupts' property should be left unspecified, and driver will fall back to polling mode Signed-off-by: Ray Jui <ray.jui@...adcom.com> Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com> --- .../devicetree/bindings/i2c/brcm,iproc-i2c.txt | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/brcm,iproc-i2c.txt b/Documentation/devicetree/bindings/i2c/brcm,iproc-i2c.txt index 81f982ccca31..7a32bf81bfa9 100644 --- a/Documentation/devicetree/bindings/i2c/brcm,iproc-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/brcm,iproc-i2c.txt @@ -9,9 +9,6 @@ Required properties: Define the base and range of the I/O address space that contain the iProc I2C controller registers -- interrupts: - Should contain the I2C interrupt - - clock-frequency: This is the I2C bus clock. Need to be either 100000 or 400000 @@ -21,6 +18,14 @@ Required properties: - #size-cells: Always 0 +Optional properties: + +- interrupts: + Should contain the I2C interrupt. For certain revisions of the I2C + controller, I2C interrupt is unwired to the interrupt controller. In such + case, this property should be left unspecified, and driver will fall back + to polling mode + Example: i2c0: i2c@...08000 { compatible = "brcm,iproc-i2c"; -- 2.17.1
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