Commit efc24e14 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Sekhar Nori
Browse files

dt/bindings: ti,edma: Remove redundant properties from documentation 



From CCCFG register of eDMA3 we can get all the needed information for the
driver about the IP:
Number of channels: NUM_DMACH
Number of regions: NUM_REGN
Number of slots (PaRAM sets): NUM_PAENTRY
Number of TC/EQ: NUM_EVQUE

The ti,edma-regions; ti,edma-slots and dma-channels in DT are
redundant since the very same information can be obtained from the HW.
The mentioned properties are deprecated.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent 6d10c395

Documentation/devicetree/bindings/dma/ti-edma.txt

+7 −6
Original line number Diff line number Diff line
@@ -2,11 +2,8 @@ TI EDMA 


Required properties:

- compatible : "ti,edma3"

- ti,edma-regions: Number of regions

- ti,edma-slots: Number of slots

- #dma-cells: Should be set to <1>

              Clients should use a single channel number per DMA request.

- dma-channels: Specify total DMA channels per CC

- reg: Memory map for accessing module

- interrupt-parent: Interrupt controller the interrupt is routed through

- interrupts: Exactly 3 interrupts need to be specified in the order:
@@ -17,6 +14,13 @@ Optional properties: 
- ti,hwmods: Name of the hwmods associated to the EDMA

- ti,edma-xbar-event-map: Crossbar event to channel map



Deprecated properties:

Listed here in case one wants to boot an old kernel with new DTB. These

properties might need to be added to the new DTS files.

- ti,edma-regions: Number of regions

- ti,edma-slots: Number of slots

- dma-channels: Specify total DMA channels per CC



Example:



edma: edma@49000000 {
@@ -26,9 +30,6 @@ edma: edma@49000000 { 
	compatible = "ti,edma3";

	ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";

	#dma-cells = <1>;

	dma-channels = <64>;

	ti,edma-regions = <4>;

	ti,edma-slots = <256>;

	ti,edma-xbar-event-map = <1 12

				  2 13>;

};

CRA Git | Maintained and supported by SUSTech CRA and CCSE