spi: spidev: Enable control of inter-word delays

Commit b7bb367afa4b added support for inserting delays in between
individual words within a single SPI transaction. This makes it
accessible from userspace.

WARNING: This delay is silently ignored unless the SPI controller
implements extra support for it. This is similar to how the in-kernel
users handle the other existing property, spi_transfer->word_delay.

Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index b0c76e2626ce..70966e10be7e 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -276,17 +276,19 @@ static int spidev_message(struct spidev_data *spidev,
                 k_tmp->bits_per_word = u_tmp->bits_per_word;
                 k_tmp->delay_usecs = u_tmp->delay_usecs;
                 k_tmp->speed_hz = u_tmp->speed_hz;
+                k_tmp->word_delay_usecs = u_tmp->word_delay_usecs;
                 if (!k_tmp->speed_hz)
                         k_tmp->speed_hz = spidev->speed_hz;
 #ifdef VERBOSE
                 dev_dbg(&spidev->spi->dev,
-                        "  xfer len %u %s%s%s%dbits %u usec %uHz\n",
+                        "  xfer len %u %s%s%s%dbits %u usec %u usec %uHz\n",
                         u_tmp->len,
                         u_tmp->rx_buf ? "rx " : "",
                         u_tmp->tx_buf ? "tx " : "",
                         u_tmp->cs_change ? "cs " : "",
                         u_tmp->bits_per_word ? : spidev->spi->bits_per_word,
                         u_tmp->delay_usecs,
+                        u_tmp->word_delay_usecs,
                         u_tmp->speed_hz ? : spidev->spi->max_speed_hz);
 #endif
                 spi_message_add_tail(k_tmp, &msg);