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Date: Fri, 4 Apr 2014 14:27:54 -0700
From: Soren Brinkmann <soren.brinkmann@...inx.com>
To: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Rob Landley <rob@...dley.net>,
Russell King <linux@....linux.org.uk>,
Wolfram Sang <wsa@...-dreams.de>,
Grant Likely <grant.likely@...aro.org>,
Michal Simek <michal.simek@...inx.com>
Cc: Mike Looijmans <mike.looijmans@...ic.nl>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Harini Katakam <harinik@...inx.com>, linux-doc@...r.kernel.org,
devicetree@...r.kernel.org, linux-i2c@...r.kernel.org,
Sören Brinkmann <soren.brinkmann@...inx.com>,
Gerhard Sittig <gsi@...x.de>
Subject: [PATCH v5 1/3] i2c: cadence: Document device tree bindings
Add device tree binding documentation for the Cadence I2C controller.
Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
---
Changes in v5:
- Document all properties
- list clock-names as optional property (driver doesn't use it, though)
- use lower case hex digits in 'reg' property
- reword description of 'clocks' property
- remove implementation specific notes regarding default speed
- use #defines for interrupt specifier
Changes in v4:
- moved adding DT docs into this dedicated patch
Changes in v3: None
Changes in v2: None
---
.../devicetree/bindings/i2c/i2c-cadence.txt | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-cadence.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-cadence.txt b/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
new file mode 100644
index 000000000000..7cb0b5608f49
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
@@ -0,0 +1,24 @@
+Binding for the Cadence I2C controller
+
+Required properties:
+ - reg: Physical base address and size of the controller's register area.
+ - compatible: Compatibility string. Must be 'cdns,i2c-r1p10'.
+ - clocks: Input clock specifier. Refer to common clock bindings.
+ - interrupts: Interrupt specifier. Refer to interrupt bindings.
+ - #address-cells: Should be 1.
+ - #size-cells: Should be 0.
+
+Optional properties:
+ - clock-frequency: Desired operating frequency, in Hz, of the bus.
+ - clock-names: Input clock name, should be 'pclk'.
+
+Example:
+ i2c@...04000 {
+ compatible = "cdns,i2c-r1p10";
+ clocks = <&clkc 38>;
+ interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+ reg = <0xe0004000 0x1000>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
--
1.9.1.1.gbb9f595
--
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