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| author | Felix Blyakher <felixb@sgi.com> | 2009-03-03 09:18:47 -0600 |
|---|---|---|
| committer | Felix Blyakher <felixb@sgi.com> | 2009-03-03 09:18:47 -0600 |
| commit | d4fc7cea5dda04ae1a6f36175ec1dd8ff088ed52 (patch) | |
| tree | 3d65887b06c575a94feed1fd91216e32a62b31d8 /include/linux/spi/spi_bitbang.h | |
| parent | 3a011a171906a3a51a43bb860fb7c66a64cab140 (diff) | |
| parent | 2450cf51a1bdba7037e91b1bcc494b01c58aaf66 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/linux/spi/spi_bitbang.h')
| -rw-r--r-- | include/linux/spi/spi_bitbang.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h index bf8de281b4ed..eed4254bd503 100644 --- a/include/linux/spi/spi_bitbang.h +++ b/include/linux/spi/spi_bitbang.h @@ -83,6 +83,13 @@ extern int spi_bitbang_stop(struct spi_bitbang *spi); * int getmiso(struct spi_device *); * void spidelay(unsigned); * + * setsck()'s is_on parameter is a zero/nonzero boolean. + * + * setmosi()'s is_on parameter is a zero/nonzero boolean. + * + * getmiso() is required to return 0 or 1 only. Any other value is invalid + * and will result in improper operation. + * * A non-inlined routine would call bitbang_txrx_*() routines. The * main loop could easily compile down to a handful of instructions, * especially if the delay is a NOP (to run at peak speed). |