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spi: davinci: set chip-select mode in SPIDEF only once 

Quit writing the same constant value determining the chip-select
mode when no transmissions are in progress in davinci_spi_chipelect().

Instead just setup the SPIDEF register once during probe.

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 2010-08-12 12:49:05 +05:30 committed by Sekhar Nori
parent 50356dd7c1
commit 843a713bc5
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/davinci_spi.c
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@ -245,8 +245,6 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
* line for the controller * line for the controller
*/ */
if (value == BITBANG_CS_INACTIVE) { if (value == BITBANG_CS_INACTIVE) {
set_io_bits(davinci_spi->base + SPIDEF, CS_DEFAULT);
data1_reg_val |= CS_DEFAULT << SPIDAT1_CSNR_SHIFT; data1_reg_val |= CS_DEFAULT << SPIDAT1_CSNR_SHIFT;
iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1); iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1);
@ -1132,6 +1130,8 @@ static int davinci_spi_probe(struct platform_device *pdev)
clear_io_bits(davinci_spi->base + SPIGCR1, clear_io_bits(davinci_spi->base + SPIGCR1,
SPIGCR1_CLKMOD_MASK); SPIGCR1_CLKMOD_MASK);
iowrite32(CS_DEFAULT, davinci_spi->base + SPIDEF);
/* master mode default */ /* master mode default */
set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_MASTER_MASK); set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_MASTER_MASK);