[PATCH 3/4] devicetree: bindings: Add defeature-repeated-start property for Cadence I2C

From: Harini Katakam
Date: Tue Dec 02 2014 - 05:07:05 EST

From: Vishnu Motghare <vishnum@xxxxxxxxxx>

This patch adds "defeature-repeated-start" property in i2c-cadence.txt.

Signed-off-by: Vishnu Motghare <vishnum@xxxxxxxxxx>
Signed-off-by: Harini Katakam <harinik@xxxxxxxxxx>
.../devicetree/bindings/i2c/i2c-cadence.txt | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-cadence.txt b/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
index 7cb0b56..9d417a7 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
@@ -11,6 +11,17 @@ Required properties:
Optional properties:
- clock-frequency: Desired operating frequency, in Hz, of the bus.
- clock-names: Input clock name, should be 'pclk'.
+ - defeature-repeated-start: Include this property to defeature repeated start
+ This defeature is due to a few bugs in the
+ I2C controller.
+ Completion interrupt after a read/receive
+ operation is NOT obtained if HOLD bit is set
+ at that time. Because of this bug, repeated start
+ will only work if there are no transfers following
+ a read/receive transfer.
+ If HOLD is held for long without a transfer,
+ invalid read transactions are generated by the
+ controller due to a HW timeout related bug.

i2c@e0004000 {

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