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/mod_devicetable.h> 14 #include <linux/module.h> 15 #include <linux/interrupt.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-led", 45 .of_compatible = "richtek,rt5033-led", 46 }, 47 }; 48 49 static const struct regmap_config rt5033_regmap_config = { 50 .reg_bits = 8, 51 .val_bits = 8, 52 .max_register = RT5033_REG_END, 53 }; 54 55 static int rt5033_i2c_probe(struct i2c_client *i2c) 56 { 57 struct rt5033_dev *rt5033; 58 unsigned int dev_id, chip_rev; 59 int ret; 60 61 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL); 62 if (!rt5033) 63 return -ENOMEM; 64 65 i2c_set_clientdata(i2c, rt5033); 66 rt5033->dev = &i2c->dev; 67 rt5033->irq = i2c->irq; 68 rt5033->wakeup = true; 69 70 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config); 71 if (IS_ERR(rt5033->regmap)) { 72 dev_err(&i2c->dev, "Failed to allocate register map.\n"); 73 return PTR_ERR(rt5033->regmap); 74 } 75 76 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id); 77 if (ret) { 78 dev_err(&i2c->dev, "Device not found\n"); 79 return -ENODEV; 80 } 81 chip_rev = dev_id & RT5033_CHIP_REV_MASK; 82 dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev); 83 84 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq, 85 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 86 0, &rt5033_irq_chip, &rt5033->irq_data); 87 if (ret) { 88 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n", 89 rt5033->irq, ret); 90 return ret; 91 } 92 93 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs, 94 ARRAY_SIZE(rt5033_devs), NULL, 0, 95 regmap_irq_get_domain(rt5033->irq_data)); 96 if (ret < 0) { 97 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n"); 98 return ret; 99 } 100 101 device_init_wakeup(rt5033->dev, rt5033->wakeup); 102 103 return 0; 104 } 105 106 static const struct i2c_device_id rt5033_i2c_id[] = { 107 { "rt5033", }, 108 { } 109 }; 110 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id); 111 112 static const struct of_device_id rt5033_dt_match[] = { 113 { .compatible = "richtek,rt5033", }, 114 { } 115 }; 116 MODULE_DEVICE_TABLE(of, rt5033_dt_match); 117 118 static struct i2c_driver rt5033_driver = { 119 .driver = { 120 .name = "rt5033", 121 .of_match_table = rt5033_dt_match, 122 }, 123 .probe = rt5033_i2c_probe, 124 .id_table = rt5033_i2c_id, 125 }; 126 module_i2c_driver(rt5033_driver); 127 128 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); 129 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 130 MODULE_LICENSE("GPL"); 131