diff options
| author | Brian Niebuhr <bniebuhr@efjohnson.com> | 2010-09-03 08:26:35 +0200 |
|---|---|---|
| committer | Sekhar Nori <nsekhar@ti.com> | 2010-11-18 14:08:31 +0100 |
| commit | f34bd4cc68fb4548536cac56798d3fad41806724 (patch) | |
| tree | d0f97088573823fc1af8a6e9d3d6a8b2520cd2e0 /drivers | |
| parent | spi: davinci: add support for interrupt mode (diff) | |
| download | linux-f34bd4cc68fb4548536cac56798d3fad41806724.tar.xz linux-f34bd4cc68fb4548536cac56798d3fad41806724.zip | |
spi: davinci: configure the invariable bits in spipc0 only once
Configure the data-in, data-out and clock functionality pins
in SPIPC0 register only once during probe. No need to set these
bits for each transfer.
Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/davinci_spi.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c index 45cc1a77a512..6f279c5d8f94 100644 --- a/drivers/spi/davinci_spi.c +++ b/drivers/spi/davinci_spi.c @@ -536,9 +536,6 @@ static int davinci_spi_bufs_prep(struct spi_device *spi, * optimize for both flags staying cleared. */ - op_mode = SPIPC0_DIFUN_MASK - | SPIPC0_DOFUN_MASK - | SPIPC0_CLKFUN_MASK; if (!(spi->mode & SPI_NO_CS)) { pdata = davinci_spi->pdata; if (!pdata->chip_sel || @@ -886,6 +883,7 @@ static int davinci_spi_probe(struct platform_device *pdev) resource_size_t dma_tx_chan = SPI_NO_RESOURCE; resource_size_t dma_eventq = SPI_NO_RESOURCE; int i = 0, ret = 0; + u32 spipc0; pdata = pdev->dev.platform_data; if (pdata == NULL) { @@ -1028,6 +1026,10 @@ 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 */ + spipc0 = SPIPC0_DIFUN_MASK | SPIPC0_DOFUN_MASK | SPIPC0_CLKFUN_MASK; + iowrite32(spipc0, davinci_spi->base + SPIPC0); + /* initialize chip selects */ if (pdata->chip_sel) { for (i = 0; i < pdata->num_chipselect; i++) { |