diff options
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index be73d236919f..a358acdd98d3 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -2832,11 +2832,13 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) return -EINVAL; /* If an SPI controller does not support toggling the CS line on each - * transfer (indicated by the SPI_CS_WORD flag), we can emulate it by + * transfer (indicated by the SPI_CS_WORD flag) or we are using a GPIO + * for the CS line, we can emulate the CS-per-word hardware function by * splitting transfers into one-word transfers and ensuring that * cs_change is set for each transfer. */ - if ((spi->mode & SPI_CS_WORD) && !(ctlr->mode_bits & SPI_CS_WORD)) { + if ((spi->mode & SPI_CS_WORD) && (!(ctlr->mode_bits & SPI_CS_WORD) || + gpio_is_valid(spi->cs_gpio))) { size_t maxsize; int ret; |