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SubjectQuestion about s3c24xx_dma_addr in kernel ?

HI

I found never used both the from and to field of s3c24xx_dma_addr in Linux except declare s3c24XX_dma_mappings .

So I want to know why still leave this struct in kernel ?


Thanks a lot .
Best Regards.
Peter Meng


struct s3c24xx_dma_addr {
unsigned long from;
unsigned long to;
};

struct s3c24xx_dma_map {
const char *name;
struct s3c24xx_dma_addr hw_addr;

unsigned long channels[S3C2410_DMA_CHANNELS];
unsigned long channels_rx[S3C2410_DMA_CHANNELS];
};

static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
[DMACH_XD0] = {
.name = "xdreq0",
.channels = MAP(S3C2412_DMAREQSEL_XDREQ0),
.channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ0),
},
[DMACH_XD1] = {
.name = "xdreq1",
.channels = MAP(S3C2412_DMAREQSEL_XDREQ1),
.channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ1),
},
[DMACH_SDI] = {
.name = "sdi",
.channels = MAP(S3C2412_DMAREQSEL_SDI),
.channels_rx = MAP(S3C2412_DMAREQSEL_SDI),
.hw_addr.to = S3C2410_PA_SDI + S3C2410_SDIDATA,
.hw_addr.from = S3C2410_PA_SDI + S3C2410_SDIDATA,
..........







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