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| author | Axel Haslam <ahaslam@baylibre.com> | 2025-10-06 17:25:41 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-10-13 13:27:52 +0300 |
| commit | b83fb1b14c06bdd765903ac852ba20a14e24f227 (patch) | |
| tree | a1ddfb2a34f2f5390a496bd941428e85dbb6e32d /include/linux | |
| parent | 3d66d3dbd514c8b6018d65bb413c5e92af6516f6 (diff) | |
| download | linux-b83fb1b14c06bdd765903ac852ba20a14e24f227.tar.xz | |
spi: offload: Add offset parameter
Add an offset parameter that can be passed in the periodic trigger.
This is useful for example when ADC drivers implement a separate periodic
signal to trigger conversion and need offload to read the result with
some delay. While at it, add some documentation to offload periodic trigger
parameters.
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/cd315e95c0bd8523f00e91c400abcd6a418e5924.1759760519.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/spi/offload/types.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/spi/offload/types.h b/include/linux/spi/offload/types.h index 6f7892347871..cd61f8adb7a5 100644 --- a/include/linux/spi/offload/types.h +++ b/include/linux/spi/offload/types.h @@ -57,8 +57,17 @@ enum spi_offload_trigger_type { SPI_OFFLOAD_TRIGGER_PERIODIC, }; +/** + * spi_offload_trigger_periodic - configuration parameters for periodic triggers + * @frequency_hz: The rate that the trigger should fire in Hz. + * @offset_ns: A delay in nanoseconds between when this trigger fires + * compared to another trigger. This requires specialized hardware + * that supports such synchronization with a delay between two or + * more triggers. Set to 0 when not needed. + */ struct spi_offload_trigger_periodic { u64 frequency_hz; + u64 offset_ns; }; struct spi_offload_trigger_config { |