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dmaengine: Revert "dmaengine: remove s3c24xx driver"

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This reverts cccc46ae3623 ("dmaengine: remove s3c24xx driver") as it
causes regression due to missing header

Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Vinod Koul 2022-12-02 17:11:44 +05:30
parent 3a0c95b613
commit 25483dedd2
4 changed files with 1489 additions and 0 deletions
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12
drivers/dma/Kconfig
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@ -610,6 +610,18 @@ config SPRD_DMA
help
Enable support for the on-chip DMA controller on Spreadtrum platform.
config S3C24XX_DMAC
bool "Samsung S3C24XX DMA support"
depends on ARCH_S3C24XX || COMPILE_TEST
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Support for the Samsung S3C24XX DMA controller driver. The
DMA controller is having multiple DMA channels which can be
configured for different peripherals like audio, UART, SPI.
The DMA controller can transfer data from memory to peripheral,
periphal to memory, periphal to periphal and memory to memory.
config TXX9_DMAC
tristate "Toshiba TXx9 SoC DMA support"
depends on MACH_TX49XX

1
drivers/dma/Makefile
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@ -70,6 +70,7 @@ obj-$(CONFIG_STM32_DMA) += stm32-dma.o
obj-$(CONFIG_STM32_DMAMUX) += stm32-dmamux.o
obj-$(CONFIG_STM32_MDMA) += stm32-mdma.o
obj-$(CONFIG_SPRD_DMA) += sprd-dma.o
obj-$(CONFIG_S3C24XX_DMAC) += s3c24xx-dma.o
obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o
obj-$(CONFIG_TEGRA186_GPC_DMA) += tegra186-gpc-dma.o
obj-$(CONFIG_TEGRA20_APB_DMA) += tegra20-apb-dma.o

1428
drivers/dma/s3c24xx-dma.c Normal file
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File diff suppressed because it is too large Load Diff

48
include/linux/platform_data/dma-s3c24xx.h Normal file
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@ -0,0 +1,48 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* S3C24XX DMA handling
*
* Copyright (c) 2013 Heiko Stuebner <heiko@sntech.de>
*/
/* Helper to encode the source selection constraints for early s3c socs. */
#define S3C24XX_DMA_CHANREQ(src, chan) ((BIT(3) | src) << chan * 4)
enum s3c24xx_dma_bus {
S3C24XX_DMA_APB,
S3C24XX_DMA_AHB,
};
/**
* @bus: on which bus does the peripheral reside - AHB or APB.
* @handshake: is a handshake with the peripheral necessary
* @chansel: channel selection information, depending on variant; reqsel for
* s3c2443 and later and channel-selection map for earlier SoCs
* see CHANSEL doc in s3c2443-dma.c
*/
struct s3c24xx_dma_channel {
enum s3c24xx_dma_bus bus;
bool handshake;
u16 chansel;
};
struct dma_slave_map;
/**
* struct s3c24xx_dma_platdata - platform specific settings
* @num_phy_channels: number of physical channels
* @channels: array of virtual channel descriptions
* @num_channels: number of virtual channels
* @slave_map: dma slave map matching table
* @slavecnt: number of elements in slave_map
*/
struct s3c24xx_dma_platdata {
int num_phy_channels;
struct s3c24xx_dma_channel *channels;
int num_channels;
const struct dma_slave_map *slave_map;
int slavecnt;
};
struct dma_chan;
bool s3c24xx_dma_filter(struct dma_chan *chan, void *param);