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spi: Fix OCTAL mode support

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Add OCTAL mode support.
Issue detected using "--octal" spidev_test's option.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://msgid.link/r/20240618132951.2743935-4-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Patrice Chotard 2024-06-18 15:29:51 +02:00 committed by Mark Brown
parent 63deee5281
commit d6a711a898
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 7 additions and 4 deletions
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6
drivers/spi/spi.c
View File

@ -4156,7 +4156,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
return -EINVAL;
if (xfer->tx_nbits != SPI_NBITS_SINGLE &&
xfer->tx_nbits != SPI_NBITS_DUAL &&
xfer->tx_nbits != SPI_NBITS_QUAD)
xfer->tx_nbits != SPI_NBITS_QUAD &&
xfer->tx_nbits != SPI_NBITS_OCTAL)
return -EINVAL;
if ((xfer->tx_nbits == SPI_NBITS_DUAL) &&
!(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD)))
@ -4171,7 +4172,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
return -EINVAL;
if (xfer->rx_nbits != SPI_NBITS_SINGLE &&
xfer->rx_nbits != SPI_NBITS_DUAL &&
xfer->rx_nbits != SPI_NBITS_QUAD)
xfer->rx_nbits != SPI_NBITS_QUAD &&
xfer->rx_nbits != SPI_NBITS_OCTAL)
return -EINVAL;
if ((xfer->rx_nbits == SPI_NBITS_DUAL) &&
!(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD)))

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

@ -1085,12 +1085,13 @@ struct spi_transfer {
unsigned dummy_data:1;
unsigned cs_off:1;
unsigned cs_change:1;
unsigned tx_nbits:3;
unsigned rx_nbits:3;
unsigned tx_nbits:4;
unsigned rx_nbits:4;
unsigned timestamped:1;
#define SPI_NBITS_SINGLE 0x01 /* 1-bit transfer */
#define SPI_NBITS_DUAL 0x02 /* 2-bit transfer */
#define SPI_NBITS_QUAD 0x04 /* 4-bit transfer */
#define SPI_NBITS_OCTAL 0x08 /* 8-bit transfer */
u8 bits_per_word;
struct spi_delay delay;
struct spi_delay cs_change_delay;