Commit 4373f8b6 authored May 23, 2015 by Michael Welling Committed by Mark Brown May 25, 2015

spi: omap2-mcspi: Fix set_cs function for active high

The core spi driver swaps the polarity of the enable based on SPI_CS_HIGH.
The omap2 controller has an internal configuration register bit called
OMAP2_MCSPI_CHCONF_EPOL to handle active high chip selects as well.

So we have to revert swap the polarity back for the correct setting of the
OMAP2_MCSPI_CHCONF_FORCE bit in omap2_mcspi_set_cs.

Signed-off-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent be632f65

drivers/spi/spi-omap2-mcspi.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -247,6 +247,13 @@ static void omap2_mcspi_set_cs(struct spi_device *spi, bool enable)
		{
		u32 l;

		/* The controller handles the inverted chip selects
		* using the OMAP2_MCSPI_CHCONF_EPOL bit so revert
		* the inversion from the core spi_set_cs function.
		*/
		if (spi->mode & SPI_CS_HIGH)
		enable = !enable;

		if (spi->controller_state) {
		l = mcspi_cached_chconf0(spi);