Commit ec6ab42f authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Vinod Koul
Browse files

dmaengine: remove sirfsoc driver 



The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarBarry Song <baohua@kernel.org>
Cc: Barry Song <baohua@kernel.org>
Link: https://lore.kernel.org/r/20210120131859.2056308-2-arnd@kernel.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent be7ccfa6

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

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* CSR SiRFSoC DMA controller



See dma.txt first



Required properties:

- compatible: Should be "sirf,prima2-dmac", "sirf,atlas7-dmac" or

  "sirf,atlas7-dmac-v2"

- reg: Should contain DMA registers location and length.

- interrupts: Should contain one interrupt shared by all channel

- #dma-cells: must be <1>. used to represent the number of integer

    cells in the dmas property of client device.

- clocks: clock required



Example:



Controller:

dmac0: dma-controller@b00b0000 {

	compatible = "sirf,prima2-dmac";

	reg = <0xb00b0000 0x10000>;

	interrupts = <12>;

	clocks = <&clks 24>;

	#dma-cells = <1>;

};





Client:

Fill the specific dma request line in dmas. In the below example, spi0 read

channel request line is 9 of the 2nd dma controller, while write channel uses

4 of the 2nd dma controller; spi1 read channel request line is 12 of the 1st

dma controller, while write channel uses 13 of the 1st dma controller:



spi0: spi@b00d0000 {

	compatible = "sirf,prima2-spi";

	dmas = <&dmac1 9>,

		<&dmac1 4>;

	dma-names = "rx", "tx";

};



spi1: spi@b0170000 {

	compatible = "sirf,prima2-spi";

	dmas = <&dmac0 12>,

		<&dmac0 13>;

	dma-names = "rx", "tx";

};

drivers/dma/Kconfig

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@@ -519,13 +519,6 @@ config PLX_DMA 
	  These are exposed via extra functions on the switch's

	  upstream port. Each function exposes one DMA channel.



config SIRF_DMA

	tristate "CSR SiRFprimaII/SiRFmarco DMA support"

	depends on ARCH_SIRF

	select DMA_ENGINE

	help

	  Enable support for the CSR SiRFprimaII DMA engine.



config STE_DMA40

	bool "ST-Ericsson DMA40 support"

	depends on ARCH_U8500

drivers/dma/Makefile

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@@ -65,7 +65,6 @@ obj-$(CONFIG_PPC_BESTCOMM) += bestcomm/ 
obj-$(CONFIG_PXA_DMA) += pxa_dma.o

obj-$(CONFIG_RENESAS_DMA) += sh/

obj-$(CONFIG_SF_PDMA) += sf-pdma/

obj-$(CONFIG_SIRF_DMA) += sirf-dma.o

obj-$(CONFIG_STE_DMA40) += ste_dma40.o ste_dma40_ll.o

obj-$(CONFIG_STM32_DMA) += stm32-dma.o

obj-$(CONFIG_STM32_DMAMUX) += stm32-dmamux.o

drivers/dma/sirf-dma.c

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File deleted.

Preview size limit exceeded, changes collapsed.

include/linux/sirfsoc_dma.h

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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _SIRFSOC_DMA_H_

#define _SIRFSOC_DMA_H_



bool sirfsoc_dma_filter_id(struct dma_chan *chan, void *chan_id);



#endif