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ARM: S3C24XX: Reuse S3C2443 dma for S3C2416 

The dma controller is similar in S3C2443 and S3C2416 and has also
the same register layout with the same REQSEL-bits in the source
select.

The only small difference is the SIO channel of the S3C2443 for the
non-hsmmc controller which is not present on S3C2416/2450 and
second spi channel which is not present on the S3C2416.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Heiko Stuebner 2012-03-07 01:53:17 -08:00 committed by Kukjin Kim
parent b099095445
commit 46cdaba11d
4 changed files with 27 additions and 9 deletions
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10
arch/arm/mach-s3c24xx/Kconfig
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@ -42,7 +42,7 @@ config CPU_S3C2416
select CPU_LLSERIAL_S3C2440
select SAMSUNG_CLKSRC
select S3C2443_COMMON
select S3C2416_DMA if S3C24XX_DMA
select S3C2443_DMA if S3C24XX_DMA
select S3C2416_PM if PM
help
Support for the S3C2416 SoC from the S3C24XX line
@ -513,15 +513,15 @@ config S3C2443_COMMON
Common code for the S3C2443 and similar processors, which includes
the S3C2416 and S3C2450.
endif # CPU_S3C2443 || CPU_S3C2416
if CPU_S3C2443
config S3C2443_DMA
bool
help
Internal config node for S3C2443 DMA support
endif # CPU_S3C2443 || CPU_S3C2416
if CPU_S3C2443
comment "S3C2443 Boards"
config MACH_SMDK2443

2
arch/arm/mach-s3c24xx/Makefile
View File

@ -32,11 +32,11 @@ obj-$(CONFIG_CPU_S3C244X) += s3c244x.o irq-s3c244x.o clock-s3c244x.o
obj-$(CONFIG_S3C2440_DMA) += dma-s3c2440.o
obj-$(CONFIG_CPU_S3C2443) += s3c2443.o irq-s3c2443.o clock-s3c2443.o
obj-$(CONFIG_S3C2443_DMA) += dma-s3c2443.o
# common code
obj-$(CONFIG_S3C2443_COMMON) += common-s3c2443.o
obj-$(CONFIG_S3C2443_DMA) += dma-s3c2443.o
#
# machine support

22
arch/arm/mach-s3c24xx/dma-s3c2443.c
View File

@ -51,7 +51,7 @@ static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
.name = "xdreq1",
.channels = MAP(S3C2443_DMAREQSEL_XDREQ1),
},
[DMACH_SDI] = {
[DMACH_SDI] = { /* only on S3C2443 */
.name = "sdi",
.channels = MAP(S3C2443_DMAREQSEL_SDI),
},
@ -59,7 +59,7 @@ static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
.name = "spi0",
.channels = MAP(S3C2443_DMAREQSEL_SPI0TX),
},
[DMACH_SPI1] = {
[DMACH_SPI1] = { /* only on S3C2443/S3C2450 */
.name = "spi1",
.channels = MAP(S3C2443_DMAREQSEL_SPI1TX),
},
@ -141,6 +141,23 @@ static int __init s3c2443_dma_add(struct device *dev)
return s3c24xx_dma_init_map(&s3c2443_dma_sel);
}
#ifdef CONFIG_CPU_S3C2416
/* S3C2416 DMA contains the same selection table as the S3C2443 */
static struct subsys_interface s3c2416_dma_interface = {
.name = "s3c2416_dma",
.subsys = &s3c2416_subsys,
.add_dev = s3c2443_dma_add,
};
static int __init s3c2416_dma_init(void)
{
return subsys_interface_register(&s3c2416_dma_interface);
}
arch_initcall(s3c2416_dma_init);
#endif
#ifdef CONFIG_CPU_S3C2443
static struct subsys_interface s3c2443_dma_interface = {
.name = "s3c2443_dma",
.subsys = &s3c2443_subsys,
@ -153,3 +170,4 @@ static int __init s3c2443_dma_init(void)
}
arch_initcall(s3c2443_dma_init);
#endif

2
arch/arm/plat-samsung/include/plat/regs-dma.h
View File

@ -119,7 +119,7 @@
#define S3C2412_DMAREQSEL_UART2_1 S3C2412_DMAREQSEL_SRC(24)
#endif /* CONFIG_CPU_S3C2412 */
#ifdef CONFIG_CPU_S3C2443
#if defined(CONFIG_CPU_S3C2416) || defined(CONFIG_CPU_S3C2443)
#define S3C2443_DMAREQSEL_SRC(x) ((x) << 1)