1 files changed, 50 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/io/spi/driver/driver.go b/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/io/spi/driver/driver.go
new file mode 100644
index 0000000..7634440
--- /dev/null
+++ b/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/io/spi/driver/driver.go
@@ -0,0 +1,50 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package driver contains interfaces to be implemented by various SPI implementations.
+package driver // import "golang.org/x/exp/io/spi/driver"
+
+const (
+	Mode = iota
+	Bits
+	MaxSpeed
+	Order
+	Delay
+	CSChange
+)
+
+// Opener is an interface to be implemented by the SPI driver to open
+// a connection to an SPI device.
+type Opener interface {
+	Open() (Conn, error)
+}
+
+// Conn is a connection to an SPI device.
+// TODO(jbd): Extend the interface to query configuration values.
+type Conn interface {
+	// Configure configures the SPI device.
+	//
+	// Available configuration keys are:
+	//  - Mode, the SPI mode (valid values are 0, 1, 2 and 3).
+	//  - Bits, bits per word (default is 8-bit per word).
+	//  - Speed, the max clock speed (in Hz).
+	//  - Order, bit order to be used in transfers. Zero value represents
+	//    the MSB-first, non-zero values represent LSB-first encoding.
+	//  - Delay, the pause time between frames (in usecs).
+	//    Some SPI devices require a minimum amount of wait time after
+	//    each frame write. If set, Delay amount of usecs are inserted after
+	//    each write.
+	//  - CSChange, whether to leave the device's chipselect active after a Tx.
+	//
+	// SPI devices can override these values.
+	Configure(k, v int) error
+
+	// Tx performs a SPI transaction: w is written if not nil, the result is
+	// put into r if not nil. len(w) must be equal to len(r), otherwise the
+	// driver should return an error.
+	Tx(w, r []byte) error
+
+	// Close frees the underlying resources and closes the connection.
+	Close() error
+}