From 48881caec426786cd451383ee53943cc5d3bfdeb Mon Sep 17 00:00:00 2001 From: Wolfgang Muees Date: Wed, 11 Mar 2009 14:13:15 +0100 Subject: [PATCH] mmc_spi: allow setting of spi mode 3 Allow the platform data structures to specify spi mode 3 (if there is a pullup on the clock line or the spi hardware is not able to serve spi mode 0). Signed-off-by: Wolfgang Muees Acked-by: David Brownell Signed-off-by: Pierre Ossman --- drivers/mmc/host/mmc_spi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c index 87e211df68ac..ad9e0e213f64 100644 --- a/drivers/mmc/host/mmc_spi.c +++ b/drivers/mmc/host/mmc_spi.c @@ -1204,10 +1204,12 @@ static int mmc_spi_probe(struct spi_device *spi) /* MMC and SD specs only seem to care that sampling is on the * rising edge ... meaning SPI modes 0 or 3. So either SPI mode - * should be legit. We'll use mode 0 since it seems to be a - * bit less troublesome on some hardware ... unclear why. + * should be legit. We'll use mode 0 since the steady state is 0, + * which is appropriate for hotplugging, unless the platform data + * specify mode 3 (if hardware is not compatible to mode 0). */ - spi->mode = SPI_MODE_0; + if (spi->mode != SPI_MODE_3) + spi->mode = SPI_MODE_0; spi->bits_per_word = 8; status = spi_setup(spi); -- 2.30.2