On Tue, Nov 24, 2015 at 02:47:41PM +0100, Ludovic Desroches wrote:
> From: Wenyou Yang <wenyou.yang@xxxxxxxxx>
>
> Add a DT property "atmel,twd-hold-cycles" to specify the HOLD
> filed of TWIHS_CWGR register to increase the TWD hold time.
>
> Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/i2c/i2c-at91.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> index 6e81dc1..c81a0cb 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> @@ -17,6 +17,9 @@ Optional properties:
> - dma-names: should contain "tx" and "rx".
> - atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
> capable I2C controllers.
> +- atmel,twd-hold-cycles: number of cycles for TWD hold time whose value is
> + determinated by (atmel,twd-hold-cycles + 3) x t_peripheral_clock,
> + maximum value is 0x1f.
> - Child nodes conforming to i2c bus binding
>
> Examples :
> @@ -29,6 +32,7 @@ i2c0: i2c@fff84000 {
> #size-cells = <0>;
> clocks = <&twi0_clk>;
> clock-frequency = <400000>;
> + atmel,twd-hold-cycles = <2>;
>
> 24c512@50 {
> compatible = "24c512";
> --
> 2.5.0
>
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