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i2c: mv64xxx: Add I2C Transaction Generator support

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The I2C Transaction Generator offloads CPU from managing I2C
transfer step by step.

This feature is currently only available on Armada XP, so usage of
this mechanism is activated through device tree.

Based on the work of Piotr Ziecik and rewrote to use the new way of
handling multiples i2c messages.

Signed-off-by: Piotr Ziecik <kosmo@semihalf.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Gregory CLEMENT 2013-08-22 16:19:05 +02:00 • committed by Wolfram Sang
parent 874e955b17
commit 930ab3d403
2 changed files with 192 additions and 11 deletions
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10
Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
View file

@ -5,6 +5,7 @@ Required properties :
- reg : Offset and length of the register set for the device
- compatible : Should be "marvell,mv64xxx-i2c" or "allwinner,sun4i-i2c"
or "marvell,mv7230-i2c"
- interrupts : The interrupt number
Optional properties :
@ -20,3 +21,12 @@ Examples:
interrupts = <29>;
clock-frequency = <100000>;
};
For the Armada XP:
i2c@11000 {
compatible = "marvell,mv78230-i2c", "marvell,mv64xxx-i2c";
reg = <0x11000 0x100>;
interrupts = <29>;
clock-frequency = <100000>;
};