Message ID | 1539605534-22302-2-git-send-email-yogeshnarayan.gaur@nxp.com |
---|---|
State | Superseded |
Delegated to: | Boris Brezillon |
Headers | show
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spi: add support for octal mode
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expand
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diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ec395a6..80f672f 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1573,6 +1573,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi, case 4: spi->mode |= SPI_TX_QUAD; break; + case 8: + spi->mode |= SPI_TX_OCTAL; + break; default: dev_warn(&ctlr->dev, "spi-tx-bus-width %d not supported\n", @@ -1591,6 +1594,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi, case 4: spi->mode |= SPI_RX_QUAD; break; + case 8: + spi->mode |= SPI_RX_OCTAL; + break; default: dev_warn(&ctlr->dev, "spi-rx-bus-width %d not supported\n", diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index a64235e..2d21307 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -163,6 +163,8 @@ struct spi_device { #define SPI_TX_QUAD 0x200 /* transmit with 4 wires */ #define SPI_RX_DUAL 0x400 /* receive with 2 wires */ #define SPI_RX_QUAD 0x800 /* receive with 4 wires */ +#define SPI_TX_OCTAL 0x1000 /* transmit with 8 wires */ +#define SPI_RX_OCTAL 0x2000 /* receive with 8 wires */ int irq; void *controller_state; void *controller_data;
Add flags for Octal I/O data transfer Required for the SPI controller which can do the data transfer (TX/RX) on 8 data lines e.g. NXP FlexSPI controller. SPI_TX_OCTAL: transmit with 8 wires SPI_RX_OCTAL: receive with 8 wires Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com> --- Changes for v2: Incorporated review comments of Boris. drivers/spi/spi.c | 6 ++++++ include/linux/spi/spi.h | 2 ++ 2 files changed, 8 insertions(+)