Beomho Seo | 0b27125 | 2014-12-09 21:03:51 +0900 | [diff] [blame] | 1 | /* |
| 2 | * MFD core driver for the Richtek RT5033. |
| 3 | * |
| 4 | * RT5033 comprises multiple sub-devices switcing charger, fuel gauge, |
| 5 | * flash LED, current source, LDO and BUCK regulators. |
| 6 | * |
| 7 | * Copyright (C) 2014 Samsung Electronics, Co., Ltd. |
| 8 | * Author: Beomho Seo <beomho.seo@samsung.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published bythe Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/interrupt.h> |
| 18 | #include <linux/of_device.h> |
| 19 | #include <linux/mfd/core.h> |
| 20 | #include <linux/mfd/rt5033.h> |
| 21 | #include <linux/mfd/rt5033-private.h> |
| 22 | |
| 23 | static const struct regmap_irq rt5033_irqs[] = { |
| 24 | { .mask = RT5033_PMIC_IRQ_BUCKOCP, }, |
| 25 | { .mask = RT5033_PMIC_IRQ_BUCKLV, }, |
| 26 | { .mask = RT5033_PMIC_IRQ_SAFELDOLV, }, |
| 27 | { .mask = RT5033_PMIC_IRQ_LDOLV, }, |
| 28 | { .mask = RT5033_PMIC_IRQ_OT, }, |
| 29 | { .mask = RT5033_PMIC_IRQ_VDDA_UV, }, |
| 30 | }; |
| 31 | |
| 32 | static const struct regmap_irq_chip rt5033_irq_chip = { |
| 33 | .name = "rt5033", |
| 34 | .status_base = RT5033_REG_PMIC_IRQ_STAT, |
| 35 | .mask_base = RT5033_REG_PMIC_IRQ_CTRL, |
| 36 | .mask_invert = true, |
| 37 | .num_regs = 1, |
| 38 | .irqs = rt5033_irqs, |
| 39 | .num_irqs = ARRAY_SIZE(rt5033_irqs), |
| 40 | }; |
| 41 | |
| 42 | static const struct mfd_cell rt5033_devs[] = { |
| 43 | { .name = "rt5033-regulator", }, |
| 44 | { |
| 45 | .name = "rt5033-charger", |
| 46 | .of_compatible = "richtek,rt5033-charger", |
| 47 | }, { |
| 48 | .name = "rt5033-battery", |
| 49 | .of_compatible = "richtek,rt5033-battery", |
| 50 | }, |
| 51 | }; |
| 52 | |
| 53 | static const struct regmap_config rt5033_regmap_config = { |
| 54 | .reg_bits = 8, |
| 55 | .val_bits = 8, |
| 56 | .max_register = RT5033_REG_END, |
| 57 | }; |
| 58 | |
| 59 | static 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 = 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 | |
| 110 | static int rt5033_i2c_remove(struct i2c_client *i2c) |
| 111 | { |
| 112 | mfd_remove_devices(&i2c->dev); |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static const struct i2c_device_id rt5033_i2c_id[] = { |
| 118 | { "rt5033", }, |
| 119 | { } |
| 120 | }; |
| 121 | MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id); |
| 122 | |
| 123 | static const struct of_device_id rt5033_dt_match[] = { |
| 124 | { .compatible = "richtek,rt5033", }, |
| 125 | { } |
| 126 | }; |
Javier Martinez Canillas | 4895e49 | 2015-07-30 18:18:41 +0200 | [diff] [blame^] | 127 | MODULE_DEVICE_TABLE(of, rt5033_dt_match); |
Beomho Seo | 0b27125 | 2014-12-09 21:03:51 +0900 | [diff] [blame] | 128 | |
| 129 | static struct i2c_driver rt5033_driver = { |
| 130 | .driver = { |
| 131 | .name = "rt5033", |
| 132 | .of_match_table = of_match_ptr(rt5033_dt_match), |
| 133 | }, |
| 134 | .probe = rt5033_i2c_probe, |
| 135 | .remove = rt5033_i2c_remove, |
| 136 | .id_table = rt5033_i2c_id, |
| 137 | }; |
| 138 | module_i2c_driver(rt5033_driver); |
| 139 | |
| 140 | MODULE_ALIAS("i2c:rt5033"); |
| 141 | MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); |
| 142 | MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); |
| 143 | MODULE_LICENSE("GPL"); |