| /* 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 */ |
| |
| /* |
| * All the bits defined above should be covered by SPI_MODE_USER_MASK. |
| * The SPI_MODE_USER_MASK has the SPI_MODE_KERNEL_MASK counterpart in |
| * 'include/linux/spi/spi.h'. The bits defined here are from bit 0 upwards |
| * while in SPI_MODE_KERNEL_MASK they are from the other end downwards. |
| * These bits must not overlap. A static assert check should make sure of that. |
| * If adding extra bits, make sure to increase the bit index below as well. |
| */ |
| #define SPI_MODE_USER_MASK (_BITUL(16) - 1) |
| |
| #endif /* _UAPI_SPI_H */ |