[PATCH v2 1/9] i2c: document generic DT bindings for timing parameters
wsa at the-dreams.de
Tue Dec 8 01:37:45 PST 2015
From: Wolfram Sang <wsa+renesas at sang-engineering.com>
Also, sort the properties alphabetically and make indentation
consistent. Wording largely taken from i2c-rk3x.txt, thanks guys!
Only "i2c-scl-internal-delay-ns" is new, the rest is used by two drivers
already and was documented in their driver binding documentation.
Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
Acked-by: Rob Herring <robh at kernel.org>
Documentation/devicetree/bindings/i2c/i2c.txt | 31 ++++++++++++++++++++++-----
1 file changed, 26 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt
index 8a99150ac3a7fd..a00219f5ee0733 100644
@@ -29,12 +29,33 @@ Optional properties
These properties may not be supported by all drivers. However, if a driver
wants to support one of the below features, it should adapt the bindings below.
-- clock-frequency - frequency of bus clock in Hz.
-- wakeup-source - device can be used as a wakeup source.
+ frequency of bus clock in Hz.
-- interrupts - interrupts used by the device.
-- interrupt-names - "irq" and "wakeup" names are recognized by I2C core,
- other names are left to individual drivers.
+ Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
+ Number of nanoseconds the IP core additionally needs to setup SCL.
+ Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
+ Number of nanoseconds the SDA signal takes to fall; t(f) in the I2C
+ interrupts used by the device.
+ "irq" and "wakeup" names are recognized by I2C core, other names are
+ left to individual drivers.
+ device can be used as a wakeup source.
Binding may contain optional "interrupts" property, describing interrupts
used by the device. I2C core will assign "irq" interrupt (or the very first
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