| Message ID | 1432433625-23407-3-git-send-email-mwelling@ieee.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 304b427..502db29 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -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);
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> --- drivers/spi/spi-omap2-mcspi.c | 7 +++++++ 1 file changed, 7 insertions(+)