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authorSemih Hazar <semih.hazar@indefia.com>2007-05-22 23:35:12 -0400
committerDmitry Torokhov <dtor@insightbb.com>2007-05-22 23:35:12 -0400
commit230ffc8e348e7841b79fd7c659d16aa5d7ec8a69 (patch)
treeabd53863436714298c5b8920cbbbb9b2cf9ba6b7 /drivers/input/touchscreen
parentbff0de5f59ff935138eb41c397a7e50468028b83 (diff)
Input: ads7846 - SPI_CPHA mode bugfix
In commit [1] the SPI mode is set to 1, but it should be 0. As stated in the commit, ads784x samples the data on the rising edge. SPI mode 1 samples on the falling edge [2] though. The root cause of this is a bug in the omap_uwire code, which treats CPHA=1 incorrectly; so these two bugs cancel each other out on one of the main regression test platforms for this driver. [1] kernel.org GIT 7937e86a70235e1584486654687dc9908a11e00a [2] http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/touchscreen')
-rw-r--r--drivers/input/touchscreen/ads7846.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index b0110fe65da..1c9069cd3ba 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -848,7 +848,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
* may not. So we stick to very-portable 8 bit words, both RX and TX.
*/
spi->bits_per_word = 8;
- spi->mode = SPI_MODE_1;
+ spi->mode = SPI_MODE_0;
err = spi_setup(spi);
if (err < 0)
return err;