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Commit f34bd4cc authored by Brian Niebuhr's avatar Brian Niebuhr Committed by Sekhar Nori
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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: default avatarBrian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: default avatarMichael Williamson <michael.williamson@criticallink.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent e0d205e9

drivers/spi/davinci_spi.c

+5 −3
Original line number Diff line number Diff line
@@ -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++) {