[PATCH] i2c: at91: fix support of the "alternative command" feature

[Wolfram Sang]

On Wed, Aug 03, 2016 at 04:58:26PM +0200, Ludovic Desroches wrote:
> From: Cyrille Pitchen <cyrille.pitchen at atmel.com>
> 
> The "alternative command" feature was introduced with sama5d2 SoCs.
> 
> Its purpose is to let the hardware i2c controller automatically send the
> STOP condition on the i2c bus at the end of a data transfer.
> Without this feature, the i2c driver has to write the 'STOP' bit into the
> Control Register so the hardware i2c controller is triggered to send the
> STOP condition on the bus.
> 
> Using the "alternative command" feature requires to set the transfer data
> length into the 8bit DATAL field of the Alternative Command Register.
> Hence only data transfers up to 255 bytes can take advantage of the
> "alternative command" feature. For greater data transfer sizes, the driver
> should use the previous implementation, when the "alternative command"
> support was not implemented yet.
> 
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen at atmel.com>
> Signed-off-by: Ludovic Desroches <ludovic.desroches at atmel.com>

Applied to for-current, thanks!

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