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author | James Morris <jmorris@namei.org> | 2009-03-23 23:52:46 (GMT) |
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committer | James Morris <jmorris@namei.org> | 2009-03-23 23:52:46 (GMT) |
commit | 703a3cd72817e99201cef84a8a7aecc60b2b3581 (patch) | |
tree | 3e943755178ff410694722bb031f523136fbc432 /include/linux/spi | |
parent | df7f54c012b92ec93d56b68547351dcdf8a163d3 (diff) | |
parent | 8e0ee43bc2c3e19db56a4adaa9a9b04ce885cd84 (diff) | |
download | linux-fsl-qoriq-703a3cd72817e99201cef84a8a7aecc60b2b3581.tar.xz |
Merge branch 'master' into next
Diffstat (limited to 'include/linux/spi')
-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 bf8de28..eed4254 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). |