drivers/mfd/rt5033.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * MFD core driver for the Richtek RT5033.
0004  *
0005  * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
0006  * flash LED, current source, LDO and BUCK regulators.
0007  *
0008  * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
0009  * Author: Beomho Seo <beomho.seo@samsung.com>
0010  */
0011
0012 #include <linux/err.h>
0013 #include <linux/module.h>
0014 #include <linux/interrupt.h>
0015 #include <linux/of_device.h>
0016 #include <linux/mfd/core.h>
0017 #include <linux/mfd/rt5033.h>
0018 #include <linux/mfd/rt5033-private.h>
0019
0020 static const struct regmap_irq rt5033_irqs[] = {
0021     { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
0022     { .mask = RT5033_PMIC_IRQ_BUCKLV, },
0023     { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
0024     { .mask = RT5033_PMIC_IRQ_LDOLV, },
0025     { .mask = RT5033_PMIC_IRQ_OT, },
0026     { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
0027 };
0028
0029 static const struct regmap_irq_chip rt5033_irq_chip = {
0030     .name       = "rt5033",
0031     .status_base    = RT5033_REG_PMIC_IRQ_STAT,
0032     .mask_base  = RT5033_REG_PMIC_IRQ_CTRL,
0033     .mask_invert    = true,
0034     .num_regs   = 1,
0035     .irqs       = rt5033_irqs,
0036     .num_irqs   = ARRAY_SIZE(rt5033_irqs),
0037 };
0038
0039 static const struct mfd_cell rt5033_devs[] = {
0040     { .name = "rt5033-regulator", },
0041     {
0042         .name = "rt5033-charger",
0043         .of_compatible = "richtek,rt5033-charger",
0044     }, {
0045         .name = "rt5033-battery",
0046         .of_compatible = "richtek,rt5033-battery",
0047     }, {
0048         .name = "rt5033-led",
0049         .of_compatible = "richtek,rt5033-led",
0050     },
0051 };
0052
0053 static const struct regmap_config rt5033_regmap_config = {
0054     .reg_bits   = 8,
0055     .val_bits   = 8,
0056     .max_register   = RT5033_REG_END,
0057 };
0058
0059 static int rt5033_i2c_probe(struct i2c_client *i2c,
0060                 const struct i2c_device_id *id)
0061 {
0062     struct rt5033_dev *rt5033;
0063     unsigned int dev_id;
0064     int ret;
0065
0066     rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
0067     if (!rt5033)
0068         return -ENOMEM;
0069
0070     i2c_set_clientdata(i2c, rt5033);
0071     rt5033->dev = &i2c->dev;
0072     rt5033->irq = i2c->irq;
0073     rt5033->wakeup = true;
0074
0075     rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
0076     if (IS_ERR(rt5033->regmap)) {
0077         dev_err(&i2c->dev, "Failed to allocate register map.\n");
0078         return PTR_ERR(rt5033->regmap);
0079     }
0080
0081     ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
0082     if (ret) {
0083         dev_err(&i2c->dev, "Device not found\n");
0084         return -ENODEV;
0085     }
0086     dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
0087
0088     ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
0089             IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
0090             0, &rt5033_irq_chip, &rt5033->irq_data);
0091     if (ret) {
0092         dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
0093                             rt5033->irq, ret);
0094         return ret;
0095     }
0096
0097     ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
0098                    ARRAY_SIZE(rt5033_devs), NULL, 0,
0099                    regmap_irq_get_domain(rt5033->irq_data));
0100     if (ret < 0) {
0101         dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
0102         return ret;
0103     }
0104
0105     device_init_wakeup(rt5033->dev, rt5033->wakeup);
0106
0107     return 0;
0108 }
0109
0110 static const struct i2c_device_id rt5033_i2c_id[] = {
0111     { "rt5033", },
0112     { }
0113 };
0114 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
0115
0116 static const struct of_device_id rt5033_dt_match[] = {
0117     { .compatible = "richtek,rt5033", },
0118     { }
0119 };
0120 MODULE_DEVICE_TABLE(of, rt5033_dt_match);
0121
0122 static struct i2c_driver rt5033_driver = {
0123     .driver = {
0124         .name = "rt5033",
0125         .of_match_table = rt5033_dt_match,
0126     },
0127     .probe = rt5033_i2c_probe,
0128     .id_table = rt5033_i2c_id,
0129 };
0130 module_i2c_driver(rt5033_driver);
0131
0132 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
0133 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
0134 MODULE_LICENSE("GPL");