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Commit 7c7055c7 authored by Pierre-Yves MORDRET's avatar Pierre-Yves MORDRET Committed by Vinod Koul
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dt-bindings: stm32-dma: introduce DMA features bitfield 



This bitfield intends to address features to be activated within the
driver. Initially the mask was only meant for FIFO Threshold management.
Backward compatibility is preserved but the meaning of this field has been
extended to features instead of only threshold.

Signed-off-by: default avatarPierre-Yves MORDRET <pierre-yves.mordret@st.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 7928b2cb

Documentation/devicetree/bindings/dma/stm32-dma.txt

+3 −3
Original line number Diff line number Diff line
@@ -62,14 +62,14 @@ channel: a phandle to the DMA controller plus the following four integer cells: 
	0x1: medium

	0x2: high

	0x3: very high

4. A 32bit mask specifying the DMA FIFO threshold configuration which are device

   dependent:

 -bit 0-1: Fifo threshold

4. A 32bit bitfield value specifying DMA features which are device dependent:

 -bit 0-1: DMA FIFO threshold selection

	0x0: 1/4 full FIFO

	0x1: 1/2 full FIFO

	0x2: 3/4 full FIFO

	0x3: full FIFO





Example:



	usart1: serial@40011000 {