The patch titled
spi controller mode check update
has been added to the -mm tree. Its filename is
spi-controller-drivers-check-for-unsupported-modes-update.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 controller mode check update
From: David Brownell <david-b@xxxxxxxxxxx>
This lets bitbanging SPI controller drivers declare that they
support modes like SPI_CS_HIGH and SPI_3WIRE.
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_bitbang.c | 12 +++---------
include/linux/spi/spi_bitbang.h | 1 +
2 files changed, 4 insertions(+), 9 deletions(-)
diff -puN drivers/spi/spi_bitbang.c~spi-controller-drivers-check-for-unsupported-modes-update drivers/spi/spi_bitbang.c
--- a/drivers/spi/spi_bitbang.c~spi-controller-drivers-check-for-unsupported-modes-update
+++ a/drivers/spi/spi_bitbang.c
@@ -187,16 +187,10 @@ int spi_bitbang_setup(struct spi_device
bitbang = spi_master_get_devdata(spi->master);
- /* REVISIT: some systems will want to support devices using lsb-first
- * bit encodings on the wire. In pure software that would be trivial,
- * just bitbang_txrx_le_cphaX() routines shifting the other way, and
- * some hardware controllers also have this support.
- *
- * REVISIT: we should accept SPI_CS_HIGH in some cases; it's
- * easy to implement that with GPIOs, but we don't know if the
- * underlying chipselect() method support that...
+ /* Bitbangers can support SPI_CS_HIGH, SPI_3WIRE, and so on;
+ * add those to master->flags, and provide the other support.
*/
- if ((spi->mode & ~(SPI_CPOL|SPI_CPHA)) != 0)
+ if ((spi->mode & ~(SPI_CPOL|SPI_CPHA|bitbang->flags)) != 0)
return -EINVAL;
if (!cs) {
diff -puN include/linux/spi/spi_bitbang.h~spi-controller-drivers-check-for-unsupported-modes-update include/linux/spi/spi_bitbang.h
--- a/include/linux/spi/spi_bitbang.h~spi-controller-drivers-check-for-unsupported-modes-update
+++ a/include/linux/spi/spi_bitbang.h
@@ -26,6 +26,7 @@ struct spi_bitbang {
struct list_head queue;
u8 busy;
u8 use_dma;
+ u8 flags; /* extra spi->mode support */
struct spi_master *master;
_
Patches currently in -mm which might be from david-b@xxxxxxxxxxx are
origin.patch
spi-dynamic-busid-generation-bugfix.patch
git-avr32.patch
git-leds.patch
git-mmc.patch
git-backlight.patch
char-genrtc-use-wait_event_interruptible.patch
spi-controller-drivers-check-for-unsupported-modes.patch
spi-controller-drivers-check-for-unsupported-modes-update.patch
spi-add-3wire-mode-flag.patch
spi-add-3wire-mode-flag-fix.patch
spidev-compiler-warning-gone.patch
rtc-ds1307-cleanups.patch
rtc-rs5c372-becomes-a-new-style-i2c-driver.patch
-
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