linux-imx

/*

 * AD5504, AD5501 High Voltage Digital to Analog Converter

 *

 * Copyright 2011 Analog Devices Inc.

 *

 * Licensed under the GPL-2.

 */

​

#include <linux/interrupt.h>

#include <linux/fs.h>

#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/spi/spi.h>

#include <linux/slab.h>

#include <linux/sysfs.h>

#include <linux/regulator/consumer.h>

#include <linux/module.h>

#include <linux/bitops.h>

​

#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/iio/events.h>

#include <linux/iio/dac/ad5504.h>

​

#define AD5504_RES_MASK         GENMASK(11, 0)

#define AD5504_CMD_READ         BIT(15)

#define AD5504_CMD_WRITE        0

#define AD5504_ADDR(addr)       ((addr) << 12)

​

/* Registers */

#define AD5504_ADDR_NOOP        0

#define AD5504_ADDR_DAC(x)      ((x) + 1)

#define AD5504_ADDR_ALL_DAC     5

#define AD5504_ADDR_CTRL        7

​

/* Control Register */

#define AD5504_DAC_PWR(ch)      ((ch) << 2)

#define AD5504_DAC_PWRDWN_MODE(mode)    ((mode) << 6)

#define AD5504_DAC_PWRDN_20K        0

#define AD5504_DAC_PWRDN_3STATE     1

​

/**

 * struct ad5446_state - driver instance specific data

 * @spi:            spi_device

 * @reg:        supply regulator

 * @vref_mv:        actual reference voltage used

 * @pwr_down_mask   power down mask

 * @pwr_down_mode   current power down mode

 * @data:       transfer buffer

 */

struct ad5504_state {

    struct spi_device       *spi;

    struct regulator        *reg;

    unsigned short          vref_mv;

    unsigned            pwr_down_mask;

    unsigned            pwr_down_mode;

​

    __be16              data[2] ____cacheline_aligned;

};

​

/**

 * ad5504_supported_device_ids:

 */