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41 lines
1.7 KiB
41 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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#ifndef _UAPI_SPI_H |
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#define _UAPI_SPI_H |
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#include <linux/const.h> |
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#define SPI_CPHA _BITUL(0) /* clock phase */ |
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#define SPI_CPOL _BITUL(1) /* clock polarity */ |
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#define SPI_MODE_0 (0|0) /* (original MicroWire) */ |
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#define SPI_MODE_1 (0|SPI_CPHA) |
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#define SPI_MODE_2 (SPI_CPOL|0) |
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#define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) |
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#define SPI_MODE_X_MASK (SPI_CPOL|SPI_CPHA) |
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#define SPI_CS_HIGH _BITUL(2) /* chipselect active high? */ |
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#define SPI_LSB_FIRST _BITUL(3) /* per-word bits-on-wire */ |
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#define SPI_3WIRE _BITUL(4) /* SI/SO signals shared */ |
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#define SPI_LOOP _BITUL(5) /* loopback mode */ |
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#define SPI_NO_CS _BITUL(6) /* 1 dev/bus, no chipselect */ |
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#define SPI_READY _BITUL(7) /* slave pulls low to pause */ |
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#define SPI_TX_DUAL _BITUL(8) /* transmit with 2 wires */ |
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#define SPI_TX_QUAD _BITUL(9) /* transmit with 4 wires */ |
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#define SPI_RX_DUAL _BITUL(10) /* receive with 2 wires */ |
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#define SPI_RX_QUAD _BITUL(11) /* receive with 4 wires */ |
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#define SPI_CS_WORD _BITUL(12) /* toggle cs after each word */ |
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#define SPI_TX_OCTAL _BITUL(13) /* transmit with 8 wires */ |
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#define SPI_RX_OCTAL _BITUL(14) /* receive with 8 wires */ |
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#define SPI_3WIRE_HIZ _BITUL(15) /* high impedance turnaround */ |
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/* |
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* All the bits defined above should be covered by SPI_MODE_USER_MASK. |
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* The SPI_MODE_USER_MASK has the SPI_MODE_KERNEL_MASK counterpart in |
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* 'include/linux/spi/spi.h'. The bits defined here are from bit 0 upwards |
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* while in SPI_MODE_KERNEL_MASK they are from the other end downwards. |
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* These bits must not overlap. A static assert check should make sure of that. |
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* If adding extra bits, make sure to increase the bit index below as well. |
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*/ |
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#define SPI_MODE_USER_MASK (_BITUL(16) - 1) |
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#endif /* _UAPI_SPI_H */
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