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 20 static 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 29 static 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 39 static 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 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 = 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 } 109 110 static const struct i2c_device_id rt5033_i2c_id[] = { 111 { "rt5033", }, 112 { } 113 }; 114 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id); 115 116 static const struct of_device_id rt5033_dt_match[] = { 117 { .compatible = "richtek,rt5033", }, 118 { } 119 }; 120 MODULE_DEVICE_TABLE(of, rt5033_dt_match); 121 122 static 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 }; 130 module_i2c_driver(rt5033_driver); 131 132 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); 133 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 134 MODULE_LICENSE("GPL"); 135