The patch titled
spi_mpc83xx: support loopback mode
has been added to the -mm tree. Its filename is
spi_mpc83xx-support-loopback-mode.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: spi_mpc83xx: support loopback mode
From: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
This exposes the hardware loopback mode to drivers, primarily for testing.
Signed-off-by: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_mpc83xx.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff -puN drivers/spi/spi_mpc83xx.c~spi_mpc83xx-support-loopback-mode drivers/spi/spi_mpc83xx.c
--- a/drivers/spi/spi_mpc83xx.c~spi_mpc83xx-support-loopback-mode
+++ a/drivers/spi/spi_mpc83xx.c
@@ -39,6 +39,7 @@ struct mpc83xx_spi_reg {
};
/* SPI Controller mode register definitions */
+#define SPMODE_LOOP (1 << 30)
#define SPMODE_CI_INACTIVEHIGH (1 << 29)
#define SPMODE_CP_BEGIN_EDGECLK (1 << 28)
#define SPMODE_DIV16 (1 << 27)
@@ -155,7 +156,7 @@ static void mpc83xx_spi_chipselect(struc
/* mask out bits we are going to set */
regval &= ~(SPMODE_CP_BEGIN_EDGECLK | SPMODE_CI_INACTIVEHIGH
| SPMODE_LEN(0xF) | SPMODE_DIV16
- | SPMODE_PM(0xF) | SPMODE_REV);
+ | SPMODE_PM(0xF) | SPMODE_REV | SPMODE_LOOP);
if (spi->mode & SPI_CPHA)
regval |= SPMODE_CP_BEGIN_EDGECLK;
@@ -163,6 +164,8 @@ static void mpc83xx_spi_chipselect(struc
regval |= SPMODE_CI_INACTIVEHIGH;
if (!(spi->mode & SPI_LSB_FIRST))
regval |= SPMODE_REV;
+ if (spi->mode & SPI_LOOP)
+ regval |= SPMODE_LOOP;
regval |= SPMODE_LEN(len);
@@ -273,7 +276,8 @@ int mpc83xx_spi_setup_transfer(struct sp
}
/* the spi->mode bits understood by this driver: */
-#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST)
+#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH \
+ | SPI_LSB_FIRST | SPI_LOOP)
static int mpc83xx_spi_setup(struct spi_device *spi)
{
_
Patches currently in -mm which might be from avorontsov@xxxxxxxxxxxxx are
spi_mpc83xx-turn-off-spi-unit-while-switching-mode.patch
spi_mpc83xx-get-rid-of-magic-numbers.patch
spi_mpc83xx-support-for-lsb-first-transfers.patch
spi_mpc83xx-fix-qelsb-mode-shifts.patch
spi-loopback-mode-definition.patch
spidev-supports-more-communications-modes.patch
spidev_test-utility.patch
spi_mpc83xx-support-loopback-mode.patch
-
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