On Wed, Aug 03, 2016 at 04:58:26PM +0200, Ludovic Desroches wrote: > From: Cyrille Pitchen <cyrille.pitchen@xxxxxxxxx> > > 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@xxxxxxxxx> > Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx> Applied to for-current, thanks!
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