1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h
new file mode 100644
index 000000000000..902542e22c4a
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5446.h
@@ -0,0 +1,96 @@
+/*
+ * AD5446 SPI DAC driver
+ *
+ * Copyright 2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+#ifndef IIO_DAC_AD5446_H_
+#define IIO_DAC_AD5446_H_
+
+/* DAC Control Bits */
+
+#define AD5446_LOAD		(0x0 << 14) /* Load and update */
+#define AD5446_SDO_DIS		(0x1 << 14) /* Disable SDO */
+#define AD5446_NOP		(0x2 << 14) /* No operation */
+#define AD5446_CLK_RISING	(0x3 << 14) /* Clock data on rising edge */
+
+#define AD5620_LOAD		(0x0 << 14) /* Load and update Norm Operation*/
+#define AD5620_PWRDWN_1k	(0x1 << 14) /* Power-down: 1kOhm to GND */
+#define AD5620_PWRDWN_100k	(0x2 << 14) /* Power-down: 100kOhm to GND */
+#define AD5620_PWRDWN_TRISTATE	(0x3 << 14) /* Power-down: Three-state */
+
+#define AD5660_LOAD		(0x0 << 16) /* Load and update Norm Operation*/
+#define AD5660_PWRDWN_1k	(0x1 << 16) /* Power-down: 1kOhm to GND */
+#define AD5660_PWRDWN_100k	(0x2 << 16) /* Power-down: 100kOhm to GND */
+#define AD5660_PWRDWN_TRISTATE	(0x3 << 16) /* Power-down: Three-state */
+
+#define RES_MASK(bits)	((1 << (bits)) - 1)
+
+/**
+ * struct ad5446_state - driver instance specific data
+ * @indio_dev:		the industrial I/O device
+ * @spi:		spi_device
+ * @chip_info:		chip model specific constants, available modes etc
+ * @reg:		supply regulator
+ * @poll_work:		bottom half of polling interrupt handler
+ * @vref_mv:		actual reference voltage used
+ * @xfer:		default spi transfer
+ * @msg:		default spi message
+ * @data:		spi transmit buffer
+ */
+
+struct ad5446_state {
+	struct iio_dev			*indio_dev;
+	struct spi_device		*spi;
+	const struct ad5446_chip_info	*chip_info;
+	struct regulator		*reg;
+	struct work_struct		poll_work;
+	unsigned short			vref_mv;
+	struct spi_transfer		xfer;
+	struct spi_message		msg;
+	union {
+		unsigned short		d16;
+		unsigned char		d24[3];
+	} data;
+};
+
+/**
+ * struct ad5446_chip_info - chip specific information
+ * @bits:		accuracy of the DAC in bits
+ * @storagebits:	number of bits written to the DAC
+ * @left_shift:		number of bits the datum must be shifted
+ * @int_vref_mv:	AD5620/40/60: the internal reference voltage
+ * @store_sample:	chip specific helper function to store the datum
+ */
+
+struct ad5446_chip_info {
+	u8				bits;
+	u8				storagebits;
+	u8				left_shift;
+	u16				int_vref_mv;
+	void (*store_sample)		(struct ad5446_state *st, unsigned val);
+};
+
+/**
+ * ad5446_supported_device_ids:
+ * The AD5620/40/60 parts are available in different fixed internal reference
+ * voltage options. The actual part numbers may look differently
+ * (and a bit cryptic), however this style is used to make clear which
+ * parts are supported here.
+ */
+
+enum ad5446_supported_device_ids {
+	ID_AD5444,
+	ID_AD5446,
+	ID_AD5542A,
+	ID_AD5512A,
+	ID_AD5620_2500,
+	ID_AD5620_1250,
+	ID_AD5640_2500,
+	ID_AD5640_1250,
+	ID_AD5660_2500,
+	ID_AD5660_1250,
+};
+
+#endif /* IIO_DAC_AD5446_H_ */