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MXS: Implement DMA support into mxs-i2c

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This patch implements DMA support into mxs-i2c. DMA transfers are now enabled
via DT. The DMA operation is enabled by default.

Signed-off-by: Marek Vasut <[email protected]>
Tested-by: Fabio Estevam <[email protected]>

[wsa: rebased to 3.6-rc7]

Signed-off-by: Wolfram Sang <[email protected]>
This commit is contained in:
Marek Vasut 2012-08-24 05:44:31 +02:00 • committed by Wolfram Sang
commit 62885f59a2
3 changed files with 251 additions and 22 deletions
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2
Documentation/devicetree/bindings/i2c/i2c-mxs.txt
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@ -6,6 +6,7 @@ Required properties:
- interrupts: Should contain ERROR and DMA interrupts
- clock-frequency: Desired I2C bus clock frequency in Hz.
Only 100000Hz and 400000Hz modes are supported.
- fsl,i2c-dma-channel: APBX DMA channel for the I2C
Examples:
@ -16,4 +17,5 @@ i2c0: i2c@80058000 {
reg = <0x80058000 2000>;
interrupts = <111 68>;
clock-frequency = <100000>;
fsl,i2c-dma-channel = <6>;
};