// SPDX-License-Identifier: GPL-2.0
/*
* AD7192 and similar SPI ADC driver
*
* Copyright 2011-2015 Analog Devices Inc.
*/
#include <linux/interrupt.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/property.h>
#include <linux/units.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/adc/ad_sigma_delta.h>
/* Registers */
#define AD7192_REG_COMM 0 /* Communications Register (WO, 8-bit) */
#define AD7192_REG_STAT 0 /* Status Register (RO, 8-bit) */
#define AD7192_REG_MODE 1 /* Mode Register (RW, 24-bit */
#define AD7192_REG_CONF 2 /* Configuration Register (RW, 24-bit) */
#define AD7192_REG_DATA 3 /* Data Register (RO, 24/32-bit) */
#define AD7192_REG_ID 4 /* ID Register (RO, 8-bit) */
#define AD7192_REG_GPOCON 5 /* GPOCON Register (RO, 8-bit) */
#define AD7192_REG_OFFSET 6 /* Offset Register (RW, 16-bit */
/* (AD7792)/24-bit (AD7192)) */
#define AD7192_REG_FULLSALE 7 /* Full-Scale Register */
/* (RW, 16-bit (AD7792)/24-bit (AD7192)) */
/* Communications Register Bit Designations (AD7192_REG_COMM) */
#define AD7192_COMM_WEN BIT(7) /* Write Enable */
#define AD7192_COMM_WRITE 0 /* Write Operation */
#define AD7192_COMM_READ BIT(6) /* Read Operation */
#define AD7192_COMM_ADDR_MASK GENMASK(5, 3) /* Register Address Mask */
#define AD7192_COMM_CREAD BIT(2) /* Continuous Read of Data Register */
/* Status Register Bit Designations (AD7192_REG_STAT) */
#define AD7192_STAT_RDY BIT(7) /* Ready */
#define AD7192_STAT_ERR BIT(6) /* Error (Overrange, Underrange) */
#define AD7192_STAT_NOREF BIT(5) /* Error no external reference */
#define AD7192_STAT_PARITY BIT(4) /* Parity */
#define AD7192_STAT_CH3 BIT(2) /* Channel 3 */
#define AD7192_STAT_CH2 BIT(1) /* Channel 2 */
#define AD7192_STAT_CH1 BIT(0) /* Channel 1 */
/* Mode Register Bit Designations (AD7192_REG_MODE) */
#
