From: Ray Jui <ray.jui@broadcom.com>
To: Wolfram Sang <wsa@the-dreams.de>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>,
Ray Jui <ray.jui@broadcom.com>
Subject: [PATCH v5 3/8] dt-bindings: i2c: iproc: make 'interrupts' optional
Date: Thu, 14 Feb 2019 09:57:20 -0800 [thread overview]
Message-ID: <20190214175725.60462-4-ray.jui@broadcom.com> (raw)
In-Reply-To: <20190214175725.60462-1-ray.jui@broadcom.com>
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@broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.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@18008000 {
compatible = "brcm,iproc-i2c";
--
2.17.1
next prev parent reply other threads:[~2019-02-14 17:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-14 17:57 [PATCH v5 0/8] iProc I2C slave mode and NIC mode Ray Jui
2019-02-14 17:57 ` [PATCH v5 1/8] i2c: iproc: Extend I2C read up to 255 bytes Ray Jui
2019-03-27 22:17 ` Wolfram Sang
2019-04-01 21:35 ` Ray Jui
2019-02-14 17:57 ` [PATCH v5 2/8] i2c: iproc: Add slave mode support Ray Jui
2019-03-27 22:14 ` Wolfram Sang
2019-03-27 22:41 ` Wolfram Sang
2019-04-01 21:33 ` Ray Jui
2019-04-02 8:24 ` Rayagonda Kokatanur
2019-04-02 9:01 ` Wolfram Sang
2019-02-14 17:57 ` Ray Jui [this message]
2019-02-14 22:25 ` [PATCH v5 3/8] dt-bindings: i2c: iproc: make 'interrupts' optional Rob Herring
2019-02-14 17:57 ` [PATCH v5 4/8] i2c: iproc: add polling support Ray Jui
2019-02-14 17:57 ` [PATCH v5 5/8] i2c: iproc: use wrapper for read/write access Ray Jui
2019-02-14 17:57 ` [PATCH v5 6/8] dt-bindings: i2c: iproc: add "brcm,iproc-nic-i2c" compatible string Ray Jui
2019-02-14 22:26 ` Rob Herring
2019-03-27 22:24 ` Wolfram Sang
2019-04-01 21:43 ` Ray Jui
2019-04-02 10:17 ` Wolfram Sang
2019-02-14 17:57 ` [PATCH v5 7/8] i2c: iproc: add NIC I2C support Ray Jui
2019-04-02 10:27 ` Wolfram Sang
2019-04-02 17:57 ` Ray Jui
2019-04-03 1:10 ` Ray Jui
2019-02-14 17:57 ` [PATCH v5 8/8] arm64: dts: Stingray: Add NIC i2c device node Ray Jui
2019-02-22 20:04 ` [PATCH v5 0/8] iProc I2C slave mode and NIC mode Ray Jui
2019-03-22 16:40 ` Florian Fainelli
2019-03-27 22:27 ` Wolfram Sang
2019-04-01 21:44 ` Ray Jui
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