kernel/drivers/mfd/da9063-core.c

   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
  37 static 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
  46 static 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
  61 static struct resource da9063_onkey_resources[] = {
  62         {
  63                 .start  = DA9063_IRQ_ONKEY,
  64                 .end    = DA9063_IRQ_ONKEY,
  65                 .flags  = IORESOURCE_IRQ,
  66         },
  67 };
  68
  69 static 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
  78 static const 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                 .of_compatible  = "dlg,da9063-watchdog",
  90         },
  91         {
  92                 .name           = DA9063_DRVNAME_HWMON,
  93                 .num_resources  = ARRAY_SIZE(da9063_hwmon_resources),
  94                 .resources      = da9063_hwmon_resources,
  95         },
  96         {
  97                 .name           = DA9063_DRVNAME_ONKEY,
  98                 .num_resources  = ARRAY_SIZE(da9063_onkey_resources),
  99                 .resources      = da9063_onkey_resources,
 100         },
 101         {
 102                 .name           = DA9063_DRVNAME_RTC,
 103                 .num_resources  = ARRAY_SIZE(da9063_rtc_resources),
 104                 .resources      = da9063_rtc_resources,
 105                 .of_compatible  = "dlg,da9063-rtc",
 106         },
 107         {
 108                 .name           = DA9063_DRVNAME_VIBRATION,
 109         },
 110 };
 111
 112 int da9063_device_init(struct da9063 *da9063, unsigned int irq)
 113 {
 114         struct da9063_pdata *pdata = da9063->dev->platform_data;
 115         int model, variant_id, variant_code;
 116         int ret;
 117
 118         if (pdata) {
 119                 da9063->flags = pdata->flags;
 120                 da9063->irq_base = pdata->irq_base;
 121         } else {
 122                 da9063->flags = 0;
 123                 da9063->irq_base = -1;
 124         }
 125         da9063->chip_irq = irq;
 126
 127         if (pdata && pdata->init != NULL) {
 128                 ret = pdata->init(da9063);
 129                 if (ret != 0) {
 130                         dev_err(da9063->dev,
 131                                 "Platform initialization failed.\n");
 132                         return ret;
 133                 }
 134         }
 135
 136         ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
 137         if (ret < 0) {
 138                 dev_err(da9063->dev, "Cannot read chip model id.\n");
 139                 return -EIO;
 140         }
 141         if (model != PMIC_DA9063) {
 142                 dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
 143                 return -ENODEV;
 144         }
 145
 146         ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
 147         if (ret < 0) {
 148                 dev_err(da9063->dev, "Cannot read chip variant id.\n");
 149                 return -EIO;
 150         }
 151
 152         variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
 153
 154         dev_info(da9063->dev,
 155                  "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
 156                  model, variant_id);
 157
 158         if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
 159                 dev_err(da9063->dev,
 160                         "Cannot support variant code: 0x%02X\n", variant_code);
 161                 return -ENODEV;
 162         }
 163
 164         da9063->model = model;
 165         da9063->variant_code = variant_code;
 166
 167         ret = da9063_irq_init(da9063);
 168         if (ret) {
 169                 dev_err(da9063->dev, "Cannot initialize interrupts.\n");
 170                 return ret;
 171         }
 172
 173         da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
 174
 175         ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
 176                               ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
 177                               NULL);
 178         if (ret)
 179                 dev_err(da9063->dev, "Cannot add MFD cells\n");
 180
 181         return ret;
 182 }
 183
 184 void da9063_device_exit(struct da9063 *da9063)
 185 {
 186         mfd_remove_devices(da9063->dev);
 187         da9063_irq_exit(da9063);
 188 }
 189
 190 MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
 191 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
 192 MODULE_LICENSE("GPL");