Initial import

1 files changed, 104 insertions, 0 deletions

diff --git a/drivers/staging/iio/adc/ad7606.h b/drivers/staging/iio/adc/ad7606.h
new file mode 100644
index 000000000..ec89d055c
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7606.h
@@ -0,0 +1,104 @@
+/*
+ * AD7606 ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef IIO_ADC_AD7606_H_
+#define IIO_ADC_AD7606_H_
+
+/*
+ * TODO: struct ad7606_platform_data needs to go into include/linux/iio
+ */
+
+/**
+ * struct ad7606_platform_data - platform/board specific information
+ * @default_os:		default oversampling value {0, 2, 4, 8, 16, 32, 64}
+ * @default_range:	default range +/-{5000, 10000} mVolt
+ * @gpio_convst:	number of gpio connected to the CONVST pin
+ * @gpio_reset:		gpio connected to the RESET pin, if not used set to -1
+ * @gpio_range:		gpio connected to the RANGE pin, if not used set to -1
+ * @gpio_os0:		gpio connected to the OS0 pin, if not used set to -1
+ * @gpio_os1:		gpio connected to the OS1 pin, if not used set to -1
+ * @gpio_os2:		gpio connected to the OS2 pin, if not used set to -1
+ * @gpio_frstdata:	gpio connected to the FRSTDAT pin, if not used set to -1
+ * @gpio_stby:		gpio connected to the STBY pin, if not used set to -1
+ */
+
+struct ad7606_platform_data {
+	unsigned			default_os;
+	unsigned			default_range;
+	unsigned			gpio_convst;
+	unsigned			gpio_reset;
+	unsigned			gpio_range;
+	unsigned			gpio_os0;
+	unsigned			gpio_os1;
+	unsigned			gpio_os2;
+	unsigned			gpio_frstdata;
+	unsigned			gpio_stby;
+};
+
+/**
+ * struct ad7606_chip_info - chip specific information
+ * @name:		identification string for chip
+ * @int_vref_mv:	the internal reference voltage
+ * @channels:		channel specification
+ * @num_channels:	number of channels
+ */
+
+struct ad7606_chip_info {
+	const char			*name;
+	u16				int_vref_mv;
+	const struct iio_chan_spec	*channels;
+	unsigned			num_channels;
+};
+
+/**
+ * struct ad7606_state - driver instance specific data
+ */
+
+struct ad7606_state {
+	struct device			*dev;
+	const struct ad7606_chip_info	*chip_info;
+	struct ad7606_platform_data	*pdata;
+	struct regulator		*reg;
+	struct work_struct		poll_work;
+	wait_queue_head_t		wq_data_avail;
+	const struct ad7606_bus_ops	*bops;
+	unsigned			range;
+	unsigned			oversampling;
+	bool				done;
+	void __iomem			*base_address;
+
+	/*
+	 * DMA (thus cache coherency maintenance) requires the
+	 * transfer buffers to live in their own cache lines.
+	 */
+
+	unsigned short			data[8] ____cacheline_aligned;
+};
+
+struct ad7606_bus_ops {
+	/* more methods added in future? */
+	int (*read_block)(struct device *, int, void *);
+};
+
+void ad7606_suspend(struct iio_dev *indio_dev);
+void ad7606_resume(struct iio_dev *indio_dev);
+struct iio_dev *ad7606_probe(struct device *dev, int irq,
+			      void __iomem *base_address, unsigned id,
+			      const struct ad7606_bus_ops *bops);
+int ad7606_remove(struct iio_dev *indio_dev, int irq);
+int ad7606_reset(struct ad7606_state *st);
+
+enum ad7606_supported_device_ids {
+	ID_AD7606_8,
+	ID_AD7606_6,
+	ID_AD7606_4
+};
+
+int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
+void ad7606_ring_cleanup(struct iio_dev *indio_dev);
+#endif /* IIO_ADC_AD7606_H_ */