linux/drivers/mfd/da9063-core.c
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   1/*
   2 * da9063-core.c: Device access for Dialog DA9063 modules
   3 *
   4 * Copyright 2012 Dialog Semiconductors Ltd.
   5 * Copyright 2013 Philipp Zabel, Pengutronix
   6 *
   7 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>,
   8 *         Michal Hajduk <michal.hajduk@diasemi.com>
   9 *
  10 *  This program is free software; you can redistribute  it and/or modify it
  11 *  under  the terms of  the GNU General  Public License as published by the
  12 *  Free Software Foundation;  either version 2 of the  License, or (at your
  13 *  option) any later version.
  14 *
  15 */
  16
  17#include <linux/kernel.h>
  18#include <linux/module.h>
  19#include <linux/init.h>
  20#include <linux/slab.h>
  21#include <linux/device.h>
  22#include <linux/delay.h>
  23#include <linux/interrupt.h>
  24#include <linux/mutex.h>
  25#include <linux/mfd/core.h>
  26#include <linux/regmap.h>
  27
  28#include <linux/mfd/da9063/core.h>
  29#include <linux/mfd/da9063/pdata.h>
  30#include <linux/mfd/da9063/registers.h>
  31
  32#include <linux/proc_fs.h>
  33#include <linux/kthread.h>
  34#include <linux/uaccess.h>
  35
  36
  37static struct resource da9063_regulators_resources[] = {
  38        {
  39                .name   = "LDO_LIM",
  40                .start  = DA9063_IRQ_LDO_LIM,
  41                .end    = DA9063_IRQ_LDO_LIM,
  42                .flags  = IORESOURCE_IRQ,
  43        },
  44};
  45
  46static struct resource da9063_rtc_resources[] = {
  47        {
  48                .name   = "ALARM",
  49                .start  = DA9063_IRQ_ALARM,
  50                .end    = DA9063_IRQ_ALARM,
  51                .flags  = IORESOURCE_IRQ,
  52        },
  53        {
  54                .name   = "TICK",
  55                .start  = DA9063_IRQ_TICK,
  56                .end    = DA9063_IRQ_TICK,
  57                .flags  = IORESOURCE_IRQ,
  58        }
  59};
  60
  61static struct resource da9063_onkey_resources[] = {
  62        {
  63                .start  = DA9063_IRQ_ONKEY,
  64                .end    = DA9063_IRQ_ONKEY,
  65                .flags  = IORESOURCE_IRQ,
  66        },
  67};
  68
  69static struct resource da9063_hwmon_resources[] = {
  70        {
  71                .start  = DA9063_IRQ_ADC_RDY,
  72                .end    = DA9063_IRQ_ADC_RDY,
  73                .flags  = IORESOURCE_IRQ,
  74        },
  75};
  76
  77
  78static struct mfd_cell da9063_devs[] = {
  79        {
  80                .name           = DA9063_DRVNAME_REGULATORS,
  81                .num_resources  = ARRAY_SIZE(da9063_regulators_resources),
  82                .resources      = da9063_regulators_resources,
  83        },
  84        {
  85                .name           = DA9063_DRVNAME_LEDS,
  86        },
  87        {
  88                .name           = DA9063_DRVNAME_WATCHDOG,
  89        },
  90        {
  91                .name           = DA9063_DRVNAME_HWMON,
  92                .num_resources  = ARRAY_SIZE(da9063_hwmon_resources),
  93                .resources      = da9063_hwmon_resources,
  94        },
  95        {
  96                .name           = DA9063_DRVNAME_ONKEY,
  97                .num_resources  = ARRAY_SIZE(da9063_onkey_resources),
  98                .resources      = da9063_onkey_resources,
  99        },
 100        {
 101                .name           = DA9063_DRVNAME_RTC,
 102                .num_resources  = ARRAY_SIZE(da9063_rtc_resources),
 103                .resources      = da9063_rtc_resources,
 104        },
 105        {
 106                .name           = DA9063_DRVNAME_VIBRATION,
 107        },
 108};
 109
 110int da9063_device_init(struct da9063 *da9063, unsigned int irq)
 111{
 112        struct da9063_pdata *pdata = da9063->dev->platform_data;
 113        int model, revision;
 114        int ret;
 115
 116        if (pdata) {
 117                da9063->flags = pdata->flags;
 118                da9063->irq_base = pdata->irq_base;
 119        } else {
 120                da9063->flags = 0;
 121                da9063->irq_base = 0;
 122        }
 123        da9063->chip_irq = irq;
 124
 125        if (pdata && pdata->init != NULL) {
 126                ret = pdata->init(da9063);
 127                if (ret != 0) {
 128                        dev_err(da9063->dev,
 129                                "Platform initialization failed.\n");
 130                        return ret;
 131                }
 132        }
 133
 134        ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
 135        if (ret < 0) {
 136                dev_err(da9063->dev, "Cannot read chip model id.\n");
 137                return -EIO;
 138        }
 139        if (model != PMIC_DA9063) {
 140                dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
 141                return -ENODEV;
 142        }
 143
 144        ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &revision);
 145        if (ret < 0) {
 146                dev_err(da9063->dev, "Cannot read chip revision id.\n");
 147                return -EIO;
 148        }
 149        revision >>= DA9063_CHIP_VARIANT_SHIFT;
 150        if (revision != 3) {
 151                dev_err(da9063->dev, "Unknown chip revision: %d\n", revision);
 152                return -ENODEV;
 153        }
 154
 155        da9063->model = model;
 156        da9063->revision = revision;
 157
 158        dev_info(da9063->dev,
 159                 "Device detected (model-ID: 0x%02X  rev-ID: 0x%02X)\n",
 160                 model, revision);
 161
 162        ret = da9063_irq_init(da9063);
 163        if (ret) {
 164                dev_err(da9063->dev, "Cannot initialize interrupts.\n");
 165                return ret;
 166        }
 167
 168        ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
 169                              ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
 170                              NULL);
 171        if (ret)
 172                dev_err(da9063->dev, "Cannot add MFD cells\n");
 173
 174        return ret;
 175}
 176
 177void da9063_device_exit(struct da9063 *da9063)
 178{
 179        mfd_remove_devices(da9063->dev);
 180        da9063_irq_exit(da9063);
 181}
 182
 183MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
 184MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
 185MODULE_LICENSE("GPL");
 186
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