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| author |   Vladimir Oltean <olteanv@gmail.com> | 2019-12-27 03:24:17 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2019-12-27 23:03:43 +0000 |
| commit | 862dd2a946aa1417f013fb748e2aa0f4349b405b (patch) | |
| tree | 8710c9f5a8d6899b3f0d9e931fa7a43b2898e2dd /include/linux/spi | |
| parent | spi: uniphier: Fix FIFO threshold (diff) | |
| download | linux-dev-862dd2a946aa1417f013fb748e2aa0f4349b405b.tar.xz linux-dev-862dd2a946aa1417f013fb748e2aa0f4349b405b.zip | |
spi: Don't look at TX buffer for PTP system timestamping
The API for PTP system timestamping (associating a SPI transaction with
the system time at which it was transferred) is flawed: it assumes that
the xfer->tx_buf pointer will always be present.
This is, of course, not always the case.
So introduce a "progress" variable that denotes how many word have been
transferred.
Fix the Freescale DSPI driver, the only user of the API so far, in the
same patch.
Fixes: b42faeee718c ("spi: Add a PTP system timestamp to the transfer structure")
Fixes: d6b71dfaeeba ("spi: spi-fsl-dspi: Implement the PTP system timestamping for TCFQ mode")
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20191227012417.1057-1-olteanv@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/spi')
| -rw-r--r-- | include/linux/spi/spi.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 98fe8663033a..3a67a7e45633 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -689,10 +689,10 @@ extern void spi_finalize_current_transfer(struct spi_controller *ctlr); /* Helper calls for driver to timestamp transfer */ void spi_take_timestamp_pre(struct spi_controller *ctlr, struct spi_transfer *xfer, - const void *tx, bool irqs_off); + size_t progress, bool irqs_off); void spi_take_timestamp_post(struct spi_controller *ctlr, struct spi_transfer *xfer, - const void *tx, bool irqs_off); + size_t progress, bool irqs_off); /* the spi driver core manages memory for the spi_controller classdev */ extern struct spi_controller *__spi_alloc_controller(struct device *host, |