LXR linux/drivers/mfd/rt5033.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * MFD core driver for the Richtek RT5033.
   4 *
   5 * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
   6 * flash LED, current source, LDO and BUCK regulators.
   7 *
   8 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
   9 * Author: Beomho Seo <beomho.seo@samsung.com>
  10 */
  11
  12#include <linux/err.h>
  13#include <linux/module.h>
  14#include <linux/interrupt.h>
  15#include <linux/of_device.h>
  16#include <linux/mfd/core.h>
  17#include <linux/mfd/rt5033.h>
  18#include <linux/mfd/rt5033-private.h>
  19
  20static const struct regmap_irq rt5033_irqs[] = {
  21        { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
  22        { .mask = RT5033_PMIC_IRQ_BUCKLV, },
  23        { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
  24        { .mask = RT5033_PMIC_IRQ_LDOLV, },
  25        { .mask = RT5033_PMIC_IRQ_OT, },
  26        { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
  27};
  28
  29static const struct regmap_irq_chip rt5033_irq_chip = {
  30        .name           = "rt5033",
  31        .status_base    = RT5033_REG_PMIC_IRQ_STAT,
  32        .mask_base      = RT5033_REG_PMIC_IRQ_CTRL,
  33        .mask_invert    = true,
  34        .num_regs       = 1,
  35        .irqs           = rt5033_irqs,
  36        .num_irqs       = ARRAY_SIZE(rt5033_irqs),
  37};
  38
  39static const struct mfd_cell rt5033_devs[] = {
  40        { .name = "rt5033-regulator", },
  41        {
  42                .name = "rt5033-charger",
  43                .of_compatible = "richtek,rt5033-charger",
  44        }, {
  45                .name = "rt5033-battery",
  46                .of_compatible = "richtek,rt5033-battery",
  47        }, {
  48                .name = "rt5033-led",
  49                .of_compatible = "richtek,rt5033-led",
  50        },
  51};
  52
  53static const struct regmap_config rt5033_regmap_config = {
  54        .reg_bits       = 8,
  55        .val_bits       = 8,
  56        .max_register   = RT5033_REG_END,
  57};
  58
  59static int rt5033_i2c_probe(struct i2c_client *i2c,
  60                                const struct i2c_device_id *id)
  61{
  62        struct rt5033_dev *rt5033;
  63        unsigned int dev_id;
  64        int ret;
  65
  66        rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
  67        if (!rt5033)
  68                return -ENOMEM;
  69
  70        i2c_set_clientdata(i2c, rt5033);
  71        rt5033->dev = &i2c->dev;
  72        rt5033->irq = i2c->irq;
  73        rt5033->wakeup = true;
  74
  75        rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
  76        if (IS_ERR(rt5033->regmap)) {
  77                dev_err(&i2c->dev, "Failed to allocate register map.\n");
  78                return PTR_ERR(rt5033->regmap);
  79        }
  80
  81        ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
  82        if (ret) {
  83                dev_err(&i2c->dev, "Device not found\n");
  84                return -ENODEV;
  85        }
  86        dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
  87
  88        ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
  89                        IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
  90                        0, &rt5033_irq_chip, &rt5033->irq_data);
  91        if (ret) {
  92                dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
  93                                                        rt5033->irq, ret);
  94                return ret;
  95        }
  96
  97        ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
  98                                   ARRAY_SIZE(rt5033_devs), NULL, 0,
  99                                   regmap_irq_get_domain(rt5033->irq_data));
 100        if (ret < 0) {
 101                dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
 102                return ret;
 103        }
 104
 105        device_init_wakeup(rt5033->dev, rt5033->wakeup);
 106
 107        return 0;
 108}
 109
 110static const struct i2c_device_id rt5033_i2c_id[] = {
 111        { "rt5033", },
 112        { }
 113};
 114MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
 115
 116static const struct of_device_id rt5033_dt_match[] = {
 117        { .compatible = "richtek,rt5033", },
 118        { }
 119};
 120MODULE_DEVICE_TABLE(of, rt5033_dt_match);
 121
 122static struct i2c_driver rt5033_driver = {
 123        .driver = {
 124                .name = "rt5033",
 125                .of_match_table = rt5033_dt_match,
 126        },
 127        .probe = rt5033_i2c_probe,
 128        .id_table = rt5033_i2c_id,
 129};
 130module_i2c_driver(rt5033_driver);
 131
 132MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
 133MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
 134MODULE_LICENSE("GPL");
 135