Discussion reference: https://lore.kernel.org/lkml/20190913114550.956-1-alexandru.ardelean@xxxxxxxxxx/ This changeset introduces an `spi_delay` struct/data-type and makes the IIO ADIS driver library the first user of this. The patchset base is Jonathan's `iio/togreg` branch, but it also applies on Mark's `spi/for-next` branch. The reasons for choosing `cs_change_delay`, is: 1. this change introduces delay units 2. it is not yet widely used, meaning it can still be changed Some delays like `delay` from `spi_transfer` would require a longer update-time change & discussion. Alexandru Ardelean (3): spi: move `cs_change_delay` backwards compat logic outside switch spi: introduce spi_delay struct as "value + unit" & spi_delay_exec() spi: make `cs_change_delay` the first user of the `spi_delay` logic drivers/iio/imu/adis.c | 24 +++++++-------- drivers/spi/spi.c | 68 +++++++++++++++++++++++++++++++---------- include/linux/spi/spi.h | 22 +++++++++---- 3 files changed, 80 insertions(+), 34 deletions(-) -- Changelog v2 -> v3: * squash patches 3 & 4 into a single patch; otherwise the kernel is in broken state between those 2 patches Changelog v1 -> v2: * split away from the RFC patchset, which aims to be a broader explanation for this changeset; parts of v1 are not 100% defined yet, and may require some discussion and refinement. 2.20.1
