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Commit f008db8c authored by Jens Kuske's avatar Jens Kuske Committed by Vinod Koul
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dmaengine: sun6i: Add support for Allwinner H3 (sun8i) variant 



The H3 SoC has the same dma engine as the A31 (sun6i), with a
reduced amount of endpoints and physical channels. Add the proper
config data and compatible string to support it.

Signed-off-by: default avatarJens Kuske <jenskuske@gmail.com>
Acked-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 385f83f8

Documentation/devicetree/bindings/dma/sun6i-dma.txt

+4 −1
Original line number Diff line number Diff line
@@ -4,7 +4,10 @@ This driver follows the generic DMA bindings defined in dma.txt. 


Required properties:



- compatible:	Must be "allwinner,sun6i-a31-dma" or "allwinner,sun8i-a23-dma"

- compatible:	Must be one of

		  "allwinner,sun6i-a31-dma"

		  "allwinner,sun8i-a23-dma"

		  "allwinner,sun8i-h3-dma"

- reg:		Should contain the registers base address and length

- interrupts:	Should contain a reference to the interrupt used by this device

- clocks:	Should contain a reference to the parent AHB clock

drivers/dma/sun6i-dma.c

+12 −0
Original line number Diff line number Diff line
@@ -891,9 +891,21 @@ static struct sun6i_dma_config sun8i_a23_dma_cfg = { 
	.nr_max_vchans   = 37,

};



/*

 * The H3 has 12 physical channels, a maximum DRQ port id of 27,

 * and a total of 34 usable source and destination endpoints.

 */



static struct sun6i_dma_config sun8i_h3_dma_cfg = {

	.nr_max_channels = 12,

	.nr_max_requests = 27,

	.nr_max_vchans   = 34,

};



static const struct of_device_id sun6i_dma_match[] = {

	{ .compatible = "allwinner,sun6i-a31-dma", .data = &sun6i_a31_dma_cfg },

	{ .compatible = "allwinner,sun8i-a23-dma", .data = &sun8i_a23_dma_cfg },

	{ .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },

	{ /* sentinel */ }

};