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| author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2019-09-26 12:51:42 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-10-15 12:45:49 +0200 |
| commit | 8105936684681195d9073880b06a123b2e316811 (patch) | |
| tree | 4b28c763ded1dc5f7fce400c69bf78f5eb865ac0 /drivers/spi/spi.c | |
| parent | spi: spidev: use new `delay` field for spi transfers (diff) | |
| download | linux-8105936684681195d9073880b06a123b2e316811.tar.xz linux-8105936684681195d9073880b06a123b2e316811.zip | |
spi: tegra114: change format for `spi_set_cs_timing()` function
The initial version of `spi_set_cs_timing()` was implemented with
consideration only for clock-cycles as delay.
For cases like `CS setup` time, it's sometimes needed that micro-seconds
(or nano-seconds) are required, or sometimes even longer delays, for cases
where the device needs a little longer to start transferring that after CS
is asserted.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-15-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 2e448078a117..6beeb363515c 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -3269,15 +3269,19 @@ EXPORT_SYMBOL_GPL(spi_setup); /** * spi_set_cs_timing - configure CS setup, hold, and inactive delays * @spi: the device that requires specific CS timing configuration - * @setup: CS setup time in terms of clock count - * @hold: CS hold time in terms of clock count - * @inactive_dly: CS inactive delay between transfers in terms of clock count + * @setup: CS setup time specified via @spi_delay + * @hold: CS hold time specified via @spi_delay + * @inactive: CS inactive delay between transfers specified via @spi_delay + * + * Return: zero on success, else a negative error code. */ -void spi_set_cs_timing(struct spi_device *spi, u8 setup, u8 hold, - u8 inactive_dly) +int spi_set_cs_timing(struct spi_device *spi, struct spi_delay *setup, + struct spi_delay *hold, struct spi_delay *inactive) { if (spi->controller->set_cs_timing) - spi->controller->set_cs_timing(spi, setup, hold, inactive_dly); + return spi->controller->set_cs_timing(spi, setup, hold, + inactive); + return -ENOTSUPP; } EXPORT_SYMBOL_GPL(spi_set_cs_timing); |