linux-imx

/*

 * Driver for the Analog Devices digital potentiometers

 *

 * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.

 *

 * Licensed under the GPL-2 or later.

 */

​

#ifndef _AD_DPOT_H_

#define _AD_DPOT_H_

​

#include <linux/types.h>

​

#define DPOT_CONF(features, wipers, max_pos, uid) \

        (((features) << 18) | (((wipers) & 0xFF) << 10) | \

        ((max_pos & 0xF) << 6) | (uid & 0x3F))

​

#define DPOT_UID(conf)      (conf & 0x3F)

#define DPOT_MAX_POS(conf)  ((conf >> 6) & 0xF)

#define DPOT_WIPERS(conf)   ((conf >> 10) & 0xFF)

#define DPOT_FEAT(conf)     (conf >> 18)

​

#define BRDAC0          (1 << 0)

#define BRDAC1          (1 << 1)

#define BRDAC2          (1 << 2)

#define BRDAC3          (1 << 3)

#define BRDAC4          (1 << 4)

#define BRDAC5          (1 << 5)

#define MAX_RDACS       6

​

#define F_CMD_INC       (1 << 0)    /* Features INC/DEC ALL, 6dB */

#define F_CMD_EEP       (1 << 1)    /* Features EEPROM */

#define F_CMD_OTP       (1 << 2)    /* Features OTP */

#define F_CMD_TOL       (1 << 3)    /* RDACS feature Tolerance REG */

#define F_RDACS_RW      (1 << 4)    /* RDACS are Read/Write  */

#define F_RDACS_WONLY       (1 << 5)    /* RDACS are Write only */

#define F_AD_APPDATA        (1 << 6)    /* RDAC Address append to data */

#define F_SPI_8BIT      (1 << 7)    /* All SPI XFERS are 8-bit */

#define F_SPI_16BIT     (1 << 8)    /* All SPI XFERS are 16-bit */

#define F_SPI_24BIT     (1 << 9)    /* All SPI XFERS are 24-bit */

​

#define F_RDACS_RW_TOL  (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL)

#define F_RDACS_RW_EEP  (F_RDACS_RW | F_CMD_EEP)

#define F_SPI       (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT)

​

enum dpot_devid {

    AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */

    AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),

    AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,

            BRDAC1 | BRDAC3, 6, 2),

    AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,

            BRDAC1 | BRDAC3, 8, 3),

    AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,

            BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),

    AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,

            BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5),

    AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,

            BRDAC0 | BRDAC1 | BRDAC2, 9, 6),

    AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0, 8, 7), /* SPI */

    AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0, 8, 8),

    AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,

            BRDAC0 | BRDAC1, 8, 9),

    AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0, 8, 10),

    AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0, 8, 11),

    AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0, 5, 12),

    AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13),

    AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,

            BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14),

    AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,

            BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5,

            8, 15),

    AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,

            BRDAC0 | BRDAC1, 8, 16),

    AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,

            BRDAC0, 10, 17),

    AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,

            BRDAC0 | BRDAC1, 8, 18),

    AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,

            BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19),

    AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,

            BRDAC0 | BRDAC1, 10, 20),

    AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,

            BRDAC0, 8, 21),

    AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,

            BRDAC0 | BRDAC1, 8, 22),

    AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,