mirror of
https://gitee.com/bianbu-linux/linux-6.6
synced 2025-04-24 14:07:52 -04:00
f7005142da
This change moves all the SPI mode bits into a separate 'spi.h' header in uAPI. This is meant to re-use these definitions inside the kernel as well as export them to userspace (via uAPI). The SPI mode definitions have usually been duplicated between between 'include/linux/spi/spi.h' and 'include/uapi/linux/spi/spidev.h', so whenever adding a new entry, this would need to be put in both headers. They've been moved from 'include/linux/spi/spi.h', since that seems a bit more complete; the bits have descriptions and there is the SPI_MODE_X_MASK. This change also does a conversion of these bitfields to _BITUL() macro. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20201221152936.53873-1-alexandru.ardelean@analog.com Signed-off-by: Mark Brown <broonie@kernel.org>
31 lines
1.3 KiB
C
31 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
|
|
#ifndef _UAPI_SPI_H
|
|
#define _UAPI_SPI_H
|
|
|
|
#include <linux/const.h>
|
|
|
|
#define SPI_CPHA _BITUL(0) /* clock phase */
|
|
#define SPI_CPOL _BITUL(1) /* clock polarity */
|
|
|
|
#define SPI_MODE_0 (0|0) /* (original MicroWire) */
|
|
#define SPI_MODE_1 (0|SPI_CPHA)
|
|
#define SPI_MODE_2 (SPI_CPOL|0)
|
|
#define SPI_MODE_3 (SPI_CPOL|SPI_CPHA)
|
|
#define SPI_MODE_X_MASK (SPI_CPOL|SPI_CPHA)
|
|
|
|
#define SPI_CS_HIGH _BITUL(2) /* chipselect active high? */
|
|
#define SPI_LSB_FIRST _BITUL(3) /* per-word bits-on-wire */
|
|
#define SPI_3WIRE _BITUL(4) /* SI/SO signals shared */
|
|
#define SPI_LOOP _BITUL(5) /* loopback mode */
|
|
#define SPI_NO_CS _BITUL(6) /* 1 dev/bus, no chipselect */
|
|
#define SPI_READY _BITUL(7) /* slave pulls low to pause */
|
|
#define SPI_TX_DUAL _BITUL(8) /* transmit with 2 wires */
|
|
#define SPI_TX_QUAD _BITUL(9) /* transmit with 4 wires */
|
|
#define SPI_RX_DUAL _BITUL(10) /* receive with 2 wires */
|
|
#define SPI_RX_QUAD _BITUL(11) /* receive with 4 wires */
|
|
#define SPI_CS_WORD _BITUL(12) /* toggle cs after each word */
|
|
#define SPI_TX_OCTAL _BITUL(13) /* transmit with 8 wires */
|
|
#define SPI_RX_OCTAL _BITUL(14) /* receive with 8 wires */
|
|
#define SPI_3WIRE_HIZ _BITUL(15) /* high impedance turnaround */
|
|
|
|
#endif /* _UAPI_SPI_H */
|