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spi: davinci: simplify calculation of edma acount value 

The EDMA acount (called data_type in davinci_spi_bufs_dma())
is simply the bytes_per_word obtained in the transfer setup
function. The current code calculates the acount value from
bytes_per_word in a convoluted manner. Simplify the code.

Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Brian Niebuhr 2010-08-19 16:42:42 +05:30 committed by Sekhar Nori
parent 6321be60ed
commit b7ab24a0da
1 changed files with 3 additions and 22 deletions
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25
drivers/spi/davinci_spi.c
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@ -39,9 +39,6 @@
#define CS_DEFAULT 0xFF
#define SPI_BUFSIZ (SMP_CACHE_BYTES + 1)
#define DAVINCI_DMA_DATA_TYPE_S8 0x01
#define DAVINCI_DMA_DATA_TYPE_S16 0x02
#define DAVINCI_DMA_DATA_TYPE_S32 0x04
#define SPIFMT_PHASE_MASK BIT(16)
#define SPIFMT_POLARITY_MASK BIT(17)
@ -729,19 +726,14 @@ static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t)
return t->len;
}
#define DAVINCI_DMA_DATA_TYPE_S8 0x01
#define DAVINCI_DMA_DATA_TYPE_S16 0x02
#define DAVINCI_DMA_DATA_TYPE_S32 0x04
static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
{
struct davinci_spi *davinci_spi;
int int_status = 0;
int count, temp_count;
u8 conv = 1;
u32 data1_reg_val;
struct davinci_spi_dma *davinci_spi_dma;
int word_len, data_type, ret;
int data_type, ret;
unsigned long tx_reg, rx_reg;
struct device *sdev;
@ -757,8 +749,8 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
davinci_spi->rx = t->rx_buf;
/* convert len to words based on bits_per_word */
conv = davinci_spi->bytes_per_word[spi->chip_select];
davinci_spi->count = t->len / conv;
data_type = davinci_spi->bytes_per_word[spi->chip_select];
davinci_spi->count = t->len / data_type;
data1_reg_val = ioread32(davinci_spi->base + SPIDAT1);
@ -767,17 +759,6 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
init_completion(&davinci_spi_dma->dma_rx_completion);
init_completion(&davinci_spi_dma->dma_tx_completion);
word_len = conv * 8;
if (word_len <= 8)
data_type = DAVINCI_DMA_DATA_TYPE_S8;
else if (word_len <= 16)
data_type = DAVINCI_DMA_DATA_TYPE_S16;
else if (word_len <= 32)
data_type = DAVINCI_DMA_DATA_TYPE_S32;
else
return -EINVAL;
ret = davinci_spi_bufs_prep(spi, davinci_spi);
if (ret)
return ret;