linux-imx

/*

 * AD5760, AD5780, AD5781, AD5790, AD5791 Voltage Output 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/dac/ad5791.h>

​

#define AD5791_DAC_MASK         GENMASK(19, 0)

​

#define AD5791_CMD_READ         BIT(23)

#define AD5791_CMD_WRITE        0

#define AD5791_ADDR(addr)       ((addr) << 20)

​

/* Registers */

#define AD5791_ADDR_NOOP        0

#define AD5791_ADDR_DAC0        1

#define AD5791_ADDR_CTRL        2

#define AD5791_ADDR_CLRCODE     3

#define AD5791_ADDR_SW_CTRL     4

​

/* Control Register */

#define AD5791_CTRL_RBUF        BIT(1)

#define AD5791_CTRL_OPGND       BIT(2)

#define AD5791_CTRL_DACTRI      BIT(3)

#define AD5791_CTRL_BIN2SC      BIT(4)

#define AD5791_CTRL_SDODIS      BIT(5)

#define AD5761_CTRL_LINCOMP(x)      ((x) << 6)

​

#define AD5791_LINCOMP_0_10     0

#define AD5791_LINCOMP_10_12        1

#define AD5791_LINCOMP_12_16        2

#define AD5791_LINCOMP_16_19        3

#define AD5791_LINCOMP_19_20        12

​

#define AD5780_LINCOMP_0_10     0

#define AD5780_LINCOMP_10_20        12

​

/* Software Control Register */

#define AD5791_SWCTRL_LDAC      BIT(0)

#define AD5791_SWCTRL_CLR       BIT(1)

#define AD5791_SWCTRL_RESET     BIT(2)

​

#define AD5791_DAC_PWRDN_6K     0

#define AD5791_DAC_PWRDN_3STATE     1

​

/**