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authorDavid Brownell <dbrownell@users.sourceforge.net>2009-06-18 03:26:03 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-19 00:03:42 +0400
commit7d0771970c51e736758525dd71fb82dd036b823a (patch)
tree9ff72b89cd06cd67e0db681859606dd77f5cba80 /include/linux/spi
parentb4bd2ababd20b6ecdd49cf96e39c875fbedd53af (diff)
downloadlinux-7d0771970c51e736758525dd71fb82dd036b823a.tar.xz
spi: move common spi_setup() functionality into core
Start moving some spi_setup() functionality into the SPI core from the various spi_master controller drivers: - Make that function stop being an inline; - Move two common idioms from drivers into that new function: * Default bits_per_word to 8 if that field isn't set * Issue a standardized dev_dbg() message This is a net minor source code shrink, and supports enhancments found in some follow-up patches. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/spi.h25
1 files changed, 1 insertions, 24 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index a0faa18f7b1b..0db5d64fc5e8 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -523,30 +523,7 @@ static inline void spi_message_free(struct spi_message *m)
kfree(m);
}
-/**
- * spi_setup - setup SPI mode and clock rate
- * @spi: the device whose settings are being modified
- * Context: can sleep, and no requests are queued to the device
- *
- * SPI protocol drivers may need to update the transfer mode if the
- * device doesn't work with its default. They may likewise need
- * to update clock rates or word sizes from initial values. This function
- * changes those settings, and must be called from a context that can sleep.
- * Except for SPI_CS_HIGH, which takes effect immediately, the changes take
- * effect the next time the device is selected and data is transferred to
- * or from it. When this function returns, the spi device is deselected.
- *
- * Note that this call will fail if the protocol driver specifies an option
- * that the underlying controller or its driver does not support. For
- * example, not all hardware supports wire transfers using nine bit words,
- * LSB-first wire encoding, or active-high chipselects.
- */
-static inline int
-spi_setup(struct spi_device *spi)
-{
- return spi->master->setup(spi);
-}
-
+extern int spi_setup(struct spi_device *spi);
/**
* spi_async - asynchronous SPI transfer