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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-02-12 09:11:24 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-02-12 09:11:24 -0800 |
| commit | 7df4d0c9784117f7bbaec17e9ac7f6545049b56d (patch) | |
| tree | d74ce8205b4d3ab1f6b899bbdb20e8a84740bf8b /Documentation/spi | |
| parent | 641f832c73babf0405c7afb41c8bfed999ebbad7 (diff) | |
| parent | cf20662db4dfade737015036fa9c63e888350c82 (diff) | |
| download | lwn-7df4d0c9784117f7bbaec17e9ac7f6545049b56d.tar.gz lwn-7df4d0c9784117f7bbaec17e9ac7f6545049b56d.zip | |
Merge tag 'spi-v3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few driver and documentation fixes, plus a fix for double error
handling which had crept in due to the confusing documentation - it
wasn't clear if the core or the driver was responsible for cleanup in
error cases so both tried to do it with unfortunate results"
* tag 'spi-v3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: nuc900: Set SPI_LSB_FIRST for master->mode_bits if hw->pdata->lsb is true
spi: rspi: Document support for Renesas QSPI in Kconfig
spi: Fix crash with double message finalisation on error handling
spi: correct the transfer_one_message documentation wording
spi: document the transfer_one spi_master callback
spi: spi.h: clarify the documentation of transfer_one
Diffstat (limited to 'Documentation/spi')
| -rw-r--r-- | Documentation/spi/spi-summary | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary index f72e0d1e0da8..7982bcc4d151 100644 --- a/Documentation/spi/spi-summary +++ b/Documentation/spi/spi-summary @@ -543,7 +543,22 @@ SPI MASTER METHODS queuing transfers that arrive in the meantime. When the driver is finished with this message, it must call spi_finalize_current_message() so the subsystem can issue the next - transfer. This may sleep. + message. This may sleep. + + master->transfer_one(struct spi_master *master, struct spi_device *spi, + struct spi_transfer *transfer) + The subsystem calls the driver to transfer a single transfer while + queuing transfers that arrive in the meantime. When the driver is + finished with this transfer, it must call + spi_finalize_current_transfer() so the subsystem can issue the next + transfer. This may sleep. Note: transfer_one and transfer_one_message + are mutually exclusive; when both are set, the generic subsystem does + not call your transfer_one callback. + + Return values: + negative errno: error + 0: transfer is finished + 1: transfer is still in progress DEPRECATED METHODS |