[PATCH i2c-next v5 1/5] dt-bindings: i2c: Add 'timeout-ms' and '#retries' properties as common optional

Jae Hyun Yoo jae.hyun.yoo at linux.intel.com
Thu Oct 4 08:31:03 AEST 2018

This commit adds 'timeout-ms' and '#retries' properties as common
optional properties that can be used for setting 'timeout' and
'retries' values of 'struct i2c_adapter'. With this patch, the bus
timeout value and the master transfer retries count can be set
through these DT properties at the registration time of an adapter.
Still the values can be set by I2C_TIMEOUT and I2C_RETRIES ioctls
on cdev at runtime too.

These properties may not be supported by all drivers. However, if
a driver wants to support one of them, it should adapt the
bindings in this document.

Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>
 Documentation/devicetree/bindings/i2c/i2c.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt
index 11263982470e..6d7a6e919cf8 100644
--- a/Documentation/devicetree/bindings/i2c/i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c.txt
@@ -80,6 +80,12 @@ wants to support one of the below features, it should adapt the bindings below.
 	Names of map programmable addresses.
 	It can contain any map needing another address than default one.
+- timeout-ms
+	Bus timeout in milliseconds.
+- #retries
+	Number of retries for master transfer.
 Binding may contain optional "interrupts" property, describing interrupts
 used by the device. I2C core will assign "irq" interrupt (or the very first
 interrupt if not using interrupt names) as primary interrupt for the slave.

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