From: Brian Niebuhr <bnieb...@efjohnson.com>
The function davinci_spi_bufs_prep() is doing stuff that
davinci_spi_setup() is doing. Eliminate it and move the work
to davinci_spi_setup()
Signed-off-by: Brian Niebuhr <bnieb...@efjohnson.com>
Tested-By: Michael Williamson <michael.william...@criticallink.com>
Signed-off-by: Sekhar Nori <nsek...@ti.com>
---
drivers/spi/davinci_spi.c | 64 ++++++++++++++------------------------------
1 files changed, 21 insertions(+), 43 deletions(-)
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index 6f279c5..05b6145 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -482,13 +482,33 @@ static int davinci_spi_setup(struct spi_device *spi)
int retval;
struct davinci_spi *davinci_spi;
struct davinci_spi_dma *davinci_spi_dma;
+ struct davinci_spi_platform_data *pdata;
davinci_spi = spi_master_get_devdata(spi->master);
+ pdata = davinci_spi->pdata;
/* if bits per word length is zero then set it default 8 */
if (!spi->bits_per_word)
spi->bits_per_word = 8;
+ if (!(spi->mode & SPI_NO_CS)) {
+ if ((pdata->chip_sel == NULL) ||
+ (pdata->chip_sel[spi->chip_select] == SPI_INTERN_CS))
+ set_io_bits(davinci_spi->base + SPIPC0,
+ 1 << spi->chip_select);
+
+ }
+
+ if (spi->mode & SPI_READY)
+ set_io_bits(davinci_spi->base + SPIPC0, SPIPC0_SPIENA_MASK);
+
+ if (spi->mode & SPI_LOOP)
+ set_io_bits(davinci_spi->base + SPIGCR1,
+ SPIGCR1_LOOPBACK_MASK);
+ else
+ clear_io_bits(davinci_spi->base + SPIGCR1,
+ SPIGCR1_LOOPBACK_MASK);
+
if (use_dma && davinci_spi->dma_channels) {
davinci_spi_dma = &davinci_spi->dma_channels[spi->chip_select];
@@ -523,40 +543,6 @@ static void davinci_spi_cleanup(struct spi_device *spi)
}
}
-static int davinci_spi_bufs_prep(struct spi_device *spi,
- struct davinci_spi *davinci_spi)
-{
- struct davinci_spi_platform_data *pdata;
- int op_mode = 0;
-
- /*
- * REVISIT unless devices disagree about SPI_LOOP or
- * SPI_READY (SPI_NO_CS only allows one device!), this
- * should not need to be done before each message...
- * optimize for both flags staying cleared.
- */
-
- if (!(spi->mode & SPI_NO_CS)) {
- pdata = davinci_spi->pdata;
- if (!pdata->chip_sel ||
- pdata->chip_sel[spi->chip_select] == SPI_INTERN_CS)
- op_mode |= 1 << spi->chip_select;
- }
- if (spi->mode & SPI_READY)
- op_mode |= SPIPC0_SPIENA_MASK;
-
- iowrite32(op_mode, davinci_spi->base + SPIPC0);
-
- if (spi->mode & SPI_LOOP)
- set_io_bits(davinci_spi->base + SPIGCR1,
- SPIGCR1_LOOPBACK_MASK);
- else
- clear_io_bits(davinci_spi->base + SPIGCR1,
- SPIGCR1_LOOPBACK_MASK);
-
- return 0;
-}
-
static int davinci_spi_check_error(struct davinci_spi *davinci_spi,
int int_status)
{
@@ -664,10 +650,6 @@ static int davinci_spi_bufs_pio(struct spi_device *spi,
struct spi_transfer *t)
davinci_spi->bytes_per_word[spi->chip_select];
davinci_spi->rcount = davinci_spi->wcount;
- ret = davinci_spi_bufs_prep(spi, davinci_spi);
- if (ret)
- return ret;
-
data1_reg_val = ioread32(davinci_spi->base + SPIDAT1);
/* Enable SPI */
@@ -769,10 +751,6 @@ 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);
- ret = davinci_spi_bufs_prep(spi, davinci_spi);
- if (ret)
- return ret;
-
count = t->len / data_type; /* the number of elements */
/* disable all interrupts for dma transfers */
@@ -1026,7 +1004,7 @@ static int davinci_spi_probe(struct platform_device *pdev)
udelay(100);
iowrite32(1, davinci_spi->base + SPIGCR0);
- /* Set up SPIPC0. CS and ENA init is done in davinci_spi_bufs_prep */
+ /* Set up SPIPC0. CS and ENA init is done in davinci_spi_setup */
spipc0 = SPIPC0_DIFUN_MASK | SPIPC0_DOFUN_MASK | SPIPC0_CLKFUN_MASK;
iowrite32(spipc0, davinci_spi->base + SPIPC0);
--
1.7.3.2
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