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path: root/drivers/spi/davinci_spi.c
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Diffstat (limited to 'drivers/spi/davinci_spi.c')
-rw-r--r--drivers/spi/davinci_spi.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index 4aa522134a9..a5f03dd8d8d 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -719,13 +719,14 @@ 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;
- u32 data1_reg_val;
struct davinci_spi_dma *davinci_spi_dma;
int data_type, ret;
unsigned long tx_reg, rx_reg;
+ struct davinci_spi_platform_data *pdata;
struct device *sdev;
davinci_spi = spi_master_get_devdata(spi->master);
+ pdata = davinci_spi->pdata;
sdev = davinci_spi->bitbang.master->dev.parent;
davinci_spi_dma = &davinci_spi->dma_channels;
@@ -739,8 +740,6 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
/* convert len to words based on bits_per_word */
data_type = davinci_spi->bytes_per_word[spi->chip_select];
- data1_reg_val = ioread32(davinci_spi->base + SPIDAT1);
-
init_completion(&davinci_spi_dma->dma_rx_completion);
init_completion(&davinci_spi_dma->dma_tx_completion);
@@ -781,9 +780,6 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
edma_set_dest_index(davinci_spi_dma->dma_tx_channel, 0, 0);
if (t->rx_buf) {
- /* initiate transaction */
- iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1);
-
t->rx_dma = dma_map_single(&spi->dev, (void *)t->rx_buf, count,
DMA_FROM_DEVICE);
if (dma_mapping_error(&spi->dev, t->rx_dma)) {
@@ -805,18 +801,18 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
data_type, 0);
}
- if ((t->tx_buf) || (t->rx_buf))
- edma_start(davinci_spi_dma->dma_tx_channel);
+ if (pdata->cshold_bug) {
+ u16 spidat1 = ioread16(davinci_spi->base + SPIDAT1 + 2);
+ iowrite16(spidat1, davinci_spi->base + SPIDAT1 + 2);
+ }
if (t->rx_buf)
edma_start(davinci_spi_dma->dma_rx_channel);
- if ((t->rx_buf) || (t->tx_buf))
- davinci_spi_set_dma_req(spi, 1);
+ edma_start(davinci_spi_dma->dma_tx_channel);
+ davinci_spi_set_dma_req(spi, 1);
- if (t->tx_buf)
- wait_for_completion_interruptible(
- &davinci_spi_dma->dma_tx_completion);
+ wait_for_completion_interruptible(&davinci_spi_dma->dma_tx_completion);
if (t->rx_buf)
wait_for_completion_interruptible(