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/mfd/core.h> 16 #include <linux/mfd/rt5033.h> 17 #include <linux/mfd/rt5033-private.h> 18 19 static const struct regmap_irq rt5033_irqs[] = { 20 { .mask = RT5033_PMIC_IRQ_BUCKOCP, }, 21 { .mask = RT5033_PMIC_IRQ_BUCKLV, }, 22 { .mask = RT5033_PMIC_IRQ_SAFELDOLV, }, 23 { .mask = RT5033_PMIC_IRQ_LDOLV, }, 24 { .mask = RT5033_PMIC_IRQ_OT, }, 25 { .mask = RT5033_PMIC_IRQ_VDDA_UV, }, 26 }; 27 28 static const struct regmap_irq_chip rt5033_irq_chip = { 29 .name = "rt5033", 30 .status_base = RT5033_REG_PMIC_IRQ_STAT, 31 .unmask_base = RT5033_REG_PMIC_IRQ_CTRL, 32 .num_regs = 1, 33 .irqs = rt5033_irqs, 34 .num_irqs = ARRAY_SIZE(rt5033_irqs), 35 }; 36 37 static const struct mfd_cell rt5033_devs[] = { 38 { .name = "rt5033-regulator", }, 39 { 40 .name = "rt5033-charger", 41 .of_compatible = "richtek,rt5033-charger", 42 }, { 43 .name = "rt5033-led", 44 .of_compatible = "richtek,rt5033-led", 45 }, 46 }; 47 48 static const struct regmap_config rt5033_regmap_config = { 49 .reg_bits = 8, 50 .val_bits = 8, 51 .max_register = RT5033_REG_END, 52 }; 53 54 static int rt5033_i2c_probe(struct i2c_client *i2c) 55 { 56 struct rt5033_dev *rt5033; 57 unsigned int dev_id, chip_rev; 58 int ret; 59 60 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL); 61 if (!rt5033) 62 return -ENOMEM; 63 64 i2c_set_clientdata(i2c, rt5033); 65 rt5033->dev = &i2c->dev; 66 rt5033->irq = i2c->irq; 67 rt5033->wakeup = true; 68 69 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config); 70 if (IS_ERR(rt5033->regmap)) { 71 dev_err(&i2c->dev, "Failed to allocate register map.\n"); 72 return PTR_ERR(rt5033->regmap); 73 } 74 75 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id); 76 if (ret) { 77 dev_err(&i2c->dev, "Device not found\n"); 78 return -ENODEV; 79 } 80 chip_rev = dev_id & RT5033_CHIP_REV_MASK; 81 dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev); 82 83 ret = devm_regmap_add_irq_chip(rt5033->dev, rt5033->regmap, 84 rt5033->irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 85 0, &rt5033_irq_chip, &rt5033->irq_data); 86 if (ret) { 87 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n", 88 rt5033->irq, ret); 89 return ret; 90 } 91 92 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs, 93 ARRAY_SIZE(rt5033_devs), NULL, 0, 94 regmap_irq_get_domain(rt5033->irq_data)); 95 if (ret < 0) { 96 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n"); 97 return ret; 98 } 99 100 if (rt5033->wakeup) { 101 ret = devm_device_init_wakeup(rt5033->dev); 102 if (ret) 103 return dev_err_probe(rt5033->dev, ret, "Failed to init wakeup\n"); 104 } 105 106 return 0; 107 } 108 109 static const struct i2c_device_id rt5033_i2c_id[] = { 110 { "rt5033", }, 111 { } 112 }; 113 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id); 114 115 static const struct of_device_id rt5033_dt_match[] = { 116 { .compatible = "richtek,rt5033", }, 117 { } 118 }; 119 MODULE_DEVICE_TABLE(of, rt5033_dt_match); 120 121 static struct i2c_driver rt5033_driver = { 122 .driver = { 123 .name = "rt5033", 124 .of_match_table = rt5033_dt_match, 125 }, 126 .probe = rt5033_i2c_probe, 127 .id_table = rt5033_i2c_id, 128 }; 129 module_i2c_driver(rt5033_driver); 130 131 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); 132 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 133 MODULE_LICENSE("GPL"); 134