UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Brian Niebuhr 2010-09-03 11:56:35 +05:30 committed by Sekhar Nori
parent e0d205e991
commit f34bd4cc68
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/spi/davinci_spi.c
View File

@ -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++) {