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spi: remove spi_set_cs_timing()

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No one seems to be using this global and exported function, so remove it
as it is no longer needed.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210609071918.2852069-1-gregkh@linuxfoundation.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Greg Kroah-Hartman 2021-06-09 09:19:18 +02:00 • committed by Mark Brown
parent 2b2142f247
commit 4ccf359849
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GPG key ID: 24D68B725D5487D0
2 changed files with 0 additions and 78 deletions
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73
drivers/spi/spi.c
View file

@ -3472,79 +3472,6 @@ int spi_setup(struct spi_device *spi)
} }
EXPORT_SYMBOL_GPL(spi_setup); 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 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.
*/
int spi_set_cs_timing(struct spi_device *spi, struct spi_delay *setup,
struct spi_delay *hold, struct spi_delay *inactive)
{
struct device *parent = spi->controller->dev.parent;
size_t len;
int status;
if (spi->controller->set_cs_timing &&
!(spi->cs_gpiod || gpio_is_valid(spi->cs_gpio))) {
mutex_lock(&spi->controller->io_mutex);
if (spi->controller->auto_runtime_pm) {
status = pm_runtime_get_sync(parent);
if (status < 0) {
mutex_unlock(&spi->controller->io_mutex);
pm_runtime_put_noidle(parent);
dev_err(&spi->controller->dev, "Failed to power device: %d\n",
status);
return status;
}
status = spi->controller->set_cs_timing(spi, setup,
hold, inactive);
pm_runtime_mark_last_busy(parent);
pm_runtime_put_autosuspend(parent);
} else {
status = spi->controller->set_cs_timing(spi, setup, hold,
inactive);
}
mutex_unlock(&spi->controller->io_mutex);
return status;
}
if ((setup && setup->unit == SPI_DELAY_UNIT_SCK) ||
(hold && hold->unit == SPI_DELAY_UNIT_SCK) ||
(inactive && inactive->unit == SPI_DELAY_UNIT_SCK)) {
dev_err(&spi->dev,
"Clock-cycle delays for CS not supported in SW mode\n");
return -ENOTSUPP;
}
len = sizeof(struct spi_delay);
/* copy delays to controller */
if (setup)
memcpy(&spi->controller->cs_setup, setup, len);
else
memset(&spi->controller->cs_setup, 0, len);
if (hold)
memcpy(&spi->controller->cs_hold, hold, len);
else
memset(&spi->controller->cs_hold, 0, len);
if (inactive)
memcpy(&spi->controller->cs_inactive, inactive, len);
else
memset(&spi->controller->cs_inactive, 0, len);
return 0;
}
EXPORT_SYMBOL_GPL(spi_set_cs_timing);
static int _spi_xfer_word_delay_update(struct spi_transfer *xfer, static int _spi_xfer_word_delay_update(struct spi_transfer *xfer,
struct spi_device *spi) struct spi_device *spi)
{ {

5
include/linux/spi/spi.h
View file

@ -1108,11 +1108,6 @@ static inline void spi_message_free(struct spi_message *m)
kfree(m); kfree(m);
} }
extern int spi_set_cs_timing(struct spi_device *spi,
struct spi_delay *setup,
struct spi_delay *hold,
struct spi_delay *inactive);
extern int spi_setup(struct spi_device *spi); extern int spi_setup(struct spi_device *spi);
extern int spi_async(struct spi_device *spi, struct spi_message *message); extern int spi_async(struct spi_device *spi, struct spi_message *message);
extern int spi_async_locked(struct spi_device *spi, extern int spi_async_locked(struct spi_device *spi,