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| author | Semih Hazar <semih.hazar@indefia.com> | 2007-05-23 05:35:12 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2007-05-23 05:35:12 +0200 |
| commit | 230ffc8e348e7841b79fd7c659d16aa5d7ec8a69 (patch) | |
| tree | abd53863436714298c5b8920cbbbb9b2cf9ba6b7 /drivers/input/touchscreen/ads7846.c | |
| parent | Input: ads7846 - document that it handles tsc2046 too (diff) | |
| download | linux-230ffc8e348e7841b79fd7c659d16aa5d7ec8a69.tar.xz linux-230ffc8e348e7841b79fd7c659d16aa5d7ec8a69.zip | |
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/ads7846.c')
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index b0110fe65dae..1c9069cd3bae 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; |