1 files changed, 43 insertions, 0 deletions
diff --git a/include/uapi/linux/spi/spi.h b/include/uapi/linux/spi/spi.h
new file mode 100644
index 000000000000..ca56e477d161
--- /dev/null
+++ b/include/uapi/linux/spi/spi.h
@@ -0,0 +1,43 @@
+/* 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 */
+#define	SPI_RX_CPHA_FLIP	_BITUL(16)	/* flip CPHA on Rx only xfer */
+#define SPI_MOSI_IDLE_LOW	_BITUL(17)	/* leave mosi line low when idle */
+
+/*
+ * 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(18) - 1)
+
+#endif /* _UAPI_SPI_H */