smsc.h

Go to the documentation of this file.

/*
 * SMSC ECE1099
 *
 * Copyright 2012 Texas Instruments Inc.
 *
 * Author: Sourav Poddar <[email protected]>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under  the terms of the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the License, or (at your
 *  option) any later version.
 *
 */

#ifndef __LINUX_MFD_SMSC_H
#define __LINUX_MFD_SMSC_H

#include <linux/regmap.h>

#define SMSC_ID_ECE1099         1
#define SMSC_NUM_CLIENTS        2

#define SMSC_BASE_ADDR          0x38
#define OMAP_GPIO_SMSC_IRQ      151

#define SMSC_MAXGPIO         32
#define SMSC_BANK(offs)      ((offs) >> 3)
#define SMSC_BIT(offs)       (1u << ((offs) & 0x7))

struct smsc {
    struct device *dev;
    struct i2c_client *i2c_clients[SMSC_NUM_CLIENTS];
    struct regmap *regmap;
    int clk;
    /* Stored chip id */
    int id;
};

struct smsc_gpio;
struct smsc_keypad;

static inline int smsc_read(struct device *child, unsigned int reg,
    unsigned int *dest)
{
    struct smsc     *smsc = dev_get_drvdata(child->parent);

    return regmap_read(smsc->regmap, reg, dest);
}

static inline int smsc_write(struct device *child, unsigned int reg,
    unsigned int value)
{
    struct smsc     *smsc = dev_get_drvdata(child->parent);

    return regmap_write(smsc->regmap, reg, value);
}

/* Registers for SMSC */
#define SMSC_RESET                      0xF5
#define SMSC_GRP_INT                        0xF9
#define SMSC_CLK_CTRL                       0xFA
#define SMSC_WKUP_CTRL                      0xFB
#define SMSC_DEV_ID                     0xFC
#define SMSC_DEV_REV                        0xFD
#define SMSC_VEN_ID_L                       0xFE
#define SMSC_VEN_ID_H                       0xFF

/* CLK VALUE */
#define SMSC_CLK_VALUE                      0x13

/* Registers for function GPIO INPUT */
#define SMSC_GPIO_DATA_IN_START                 0x00

/* Registers for function GPIO OUPUT */
#define SMSC_GPIO_DATA_OUT_START                                       0x05

/* Definitions for SMSC GPIO CONFIGURATION REGISTER*/
#define SMSC_GPIO_INPUT_LOW                 0x01
#define SMSC_GPIO_INPUT_RISING                  0x09
#define SMSC_GPIO_INPUT_FALLING                 0x11
#define SMSC_GPIO_INPUT_BOTH_EDGE               0x19
#define SMSC_GPIO_OUTPUT_PP                 0x21
#define SMSC_GPIO_OUTPUT_OP                 0x31

#define GRP_INT_STAT                        0xf9
#define SMSC_GPI_INT                        0x0f
#define SMSC_CFG_START                      0x0A

/* Registers for SMSC GPIO INTERRUPT STATUS REGISTER*/
#define SMSC_GPIO_INT_STAT_START                                  0x32

/* Registers for SMSC GPIO INTERRUPT MASK REGISTER*/
#define SMSC_GPIO_INT_MASK_START                               0x37

/* Registers for SMSC function KEYPAD*/
#define SMSC_KP_OUT                     0x40
#define SMSC_KP_IN                      0x41
#define SMSC_KP_INT_STAT                    0x42
#define SMSC_KP_INT_MASK                    0x43

/* Definitions for keypad */
#define SMSC_KP_KSO           0x70
#define SMSC_KP_KSI           0x51
#define SMSC_KSO_ALL_LOW        0x20
#define SMSC_KP_SET_LOW_PWR        0x0B
#define SMSC_KP_SET_HIGH           0xFF
#define SMSC_KSO_EVAL           0x00

#endif /*  __LINUX_MFD_SMSC_H */