linux-imx

/*

 * AS3711 PMIC MFC driver

 *

 * Copyright (C) 2012 Renesas Electronics Corporation

 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the version 2 of the GNU General Public License as

 * published by the Free Software Foundation

 */

​

#include <linux/device.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/mfd/as3711.h>

#include <linux/mfd/core.h>

#include <linux/of.h>

#include <linux/regmap.h>

#include <linux/slab.h>

​

enum {

    AS3711_REGULATOR,

    AS3711_BACKLIGHT,

};

​

/*

 * Ok to have it static: it is only used during probing and multiple I2C devices

 * cannot be probed simultaneously. Just make sure to avoid stale data.

 */

static struct mfd_cell as3711_subdevs[] = {

    [AS3711_REGULATOR] = {.name = "as3711-regulator",},

    [AS3711_BACKLIGHT] = {.name = "as3711-backlight",},

};

​

static bool as3711_volatile_reg(struct device *dev, unsigned int reg)

{

    switch (reg) {

    case AS3711_GPIO_SIGNAL_IN:

    case AS3711_INTERRUPT_STATUS_1:

    case AS3711_INTERRUPT_STATUS_2:

    case AS3711_INTERRUPT_STATUS_3:

    case AS3711_CHARGER_STATUS_1:

    case AS3711_CHARGER_STATUS_2:

    case AS3711_REG_STATUS:

        return true;

    }

    return false;

}

​

static bool as3711_precious_reg(struct device *dev, unsigned int reg)

{

    switch (reg) {

    case AS3711_INTERRUPT_STATUS_1:

    case AS3711_INTERRUPT_STATUS_2:

    case AS3711_INTERRUPT_STATUS_3:

        return true;

    }

    return false;

}

​

static bool as3711_readable_reg(struct device *dev, unsigned int reg)

{

    switch (reg) {

    case AS3711_SD_1_VOLTAGE:

    case AS3711_SD_2_VOLTAGE:

    case AS3711_SD_3_VOLTAGE:

    case AS3711_SD_4_VOLTAGE:

    case AS3711_LDO_1_VOLTAGE:

    case AS3711_LDO_2_VOLTAGE:

    case AS3711_LDO_3_VOLTAGE:

    case AS3711_LDO_4_VOLTAGE:

    case AS3711_LDO_5_VOLTAGE:

    case AS3711_LDO_6_VOLTAGE:

    case AS3711_LDO_7_VOLTAGE:

    case AS3711_LDO_8_VOLTAGE:

    case AS3711_SD_CONTROL:

    case AS3711_GPIO_SIGNAL_OUT:

    case AS3711_GPIO_SIGNAL_IN:

    case AS3711_SD_CONTROL_1:

    case AS3711_SD_CONTROL_2:

    case AS3711_CURR_CONTROL:

    case AS3711_CURR1_VALUE:

    case AS3711_CURR2_VALUE:

    case AS3711_CURR3_VALUE:

    case AS3711_STEPUP_CONTROL_1:

    case AS3711_STEPUP_CONTROL_2:

    case AS3711_STEPUP_CONTROL_4:

    case AS3711_STEPUP_CONTROL_5:

    case AS3711_REG_STATUS:

    case AS3711_INTERRUPT_STATUS_1: