From: Imre Deak <[EMAIL PROTECTED]>
The omap_uwire controller driver handles SPI_CPHA incorrectly;
It should mean:
CPHA=0 ... sample at leading edge of clock
CPHA=1 ... sample at trailing edge of clock
This bug has been masked by inverse bugs in layered drivers;
and was uncovered by running some of them on non-OMAP hardware.
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
--- o26.orig/drivers/spi/omap_uwire.c 2007-05-22 07:49:52.000000000 -0700
+++ o26/drivers/spi/omap_uwire.c 2007-05-22 08:02:03.000000000 -0700
@@ -358,11 +358,11 @@ static int uwire_setup_transfer(struct s
switch (spi->mode & (SPI_CPOL | SPI_CPHA)) {
case SPI_MODE_0:
case SPI_MODE_3:
- flags |= UWIRE_WRITE_RISING_EDGE | UWIRE_READ_FALLING_EDGE;
+ flags |= UWIRE_WRITE_FALLING_EDGE | UWIRE_READ_RISING_EDGE;
break;
case SPI_MODE_1:
case SPI_MODE_2:
- flags |= UWIRE_WRITE_FALLING_EDGE | UWIRE_READ_RISING_EDGE;
+ flags |= UWIRE_WRITE_RISING_EDGE | UWIRE_READ_FALLING_EDGE;
break;
}
-
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