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 }; 127 128 static struct i2c_driver rt5033_driver = { 129 .driver = { 130 .name = "rt5033", 131 .of_match_table = of_match_ptr(rt5033_dt_match), 132 }, 133 .probe = rt5033_i2c_probe, 134 .remove = rt5033_i2c_remove, 135 .id_table = rt5033_i2c_id, 136 }; 137 module_i2c_driver(rt5033_driver); 138 139 MODULE_ALIAS("i2c:rt5033"); 140 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); 141 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 142 MODULE_LICENSE("GPL"); 143