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 .unmask_base = RT5033_REG_PMIC_IRQ_CTRL, 33 .num_regs = 1, 34 .irqs = rt5033_irqs, 35 .num_irqs = ARRAY_SIZE(rt5033_irqs), 36 }; 37 38 static const struct mfd_cell rt5033_devs[] = { 39 { .name = "rt5033-regulator", }, 40 { 41 .name = "rt5033-charger", 42 .of_compatible = "richtek,rt5033-charger", 43 }, { 44 .name = "rt5033-battery", 45 .of_compatible = "richtek,rt5033-battery", 46 }, { 47 .name = "rt5033-led", 48 .of_compatible = "richtek,rt5033-led", 49 }, 50 }; 51 52 static const struct regmap_config rt5033_regmap_config = { 53 .reg_bits = 8, 54 .val_bits = 8, 55 .max_register = RT5033_REG_END, 56 }; 57 58 static int rt5033_i2c_probe(struct i2c_client *i2c) 59 { 60 struct rt5033_dev *rt5033; 61 unsigned int dev_id; 62 int ret; 63 64 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL); 65 if (!rt5033) 66 return -ENOMEM; 67 68 i2c_set_clientdata(i2c, rt5033); 69 rt5033->dev = &i2c->dev; 70 rt5033->irq = i2c->irq; 71 rt5033->wakeup = true; 72 73 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config); 74 if (IS_ERR(rt5033->regmap)) { 75 dev_err(&i2c->dev, "Failed to allocate register map.\n"); 76 return PTR_ERR(rt5033->regmap); 77 } 78 79 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id); 80 if (ret) { 81 dev_err(&i2c->dev, "Device not found\n"); 82 return -ENODEV; 83 } 84 dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id); 85 86 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq, 87 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 88 0, &rt5033_irq_chip, &rt5033->irq_data); 89 if (ret) { 90 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n", 91 rt5033->irq, ret); 92 return ret; 93 } 94 95 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs, 96 ARRAY_SIZE(rt5033_devs), NULL, 0, 97 regmap_irq_get_domain(rt5033->irq_data)); 98 if (ret < 0) { 99 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n"); 100 return ret; 101 } 102 103 device_init_wakeup(rt5033->dev, rt5033->wakeup); 104 105 return 0; 106 } 107 108 static const struct i2c_device_id rt5033_i2c_id[] = { 109 { "rt5033", }, 110 { } 111 }; 112 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id); 113 114 static const struct of_device_id rt5033_dt_match[] = { 115 { .compatible = "richtek,rt5033", }, 116 { } 117 }; 118 MODULE_DEVICE_TABLE(of, rt5033_dt_match); 119 120 static struct i2c_driver rt5033_driver = { 121 .driver = { 122 .name = "rt5033", 123 .of_match_table = rt5033_dt_match, 124 }, 125 .probe_new = rt5033_i2c_probe, 126 .id_table = rt5033_i2c_id, 127 }; 128 module_i2c_driver(rt5033_driver); 129 130 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); 131 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 132 MODULE_LICENSE("GPL"); 133