1d7d8d7a2SKrzysztof Kozlowski // SPDX-License-Identifier: GPL-2.0+ 2d7d8d7a2SKrzysztof Kozlowski // 3d7d8d7a2SKrzysztof Kozlowski // MFD core driver for the Maxim MAX77843 4d7d8d7a2SKrzysztof Kozlowski // 5d7d8d7a2SKrzysztof Kozlowski // Copyright (C) 2015 Samsung Electronics 6d7d8d7a2SKrzysztof Kozlowski // Author: Jaewon Kim <jaewon02.kim@samsung.com> 7d7d8d7a2SKrzysztof Kozlowski // Author: Beomho Seo <beomho.seo@samsung.com> 8c7f585feSJaewon Kim 9c7f585feSJaewon Kim #include <linux/err.h> 10c7f585feSJaewon Kim #include <linux/i2c.h> 11c7f585feSJaewon Kim #include <linux/init.h> 12c7f585feSJaewon Kim #include <linux/interrupt.h> 13c7f585feSJaewon Kim #include <linux/mfd/core.h> 14bc1aadc1SKrzysztof Kozlowski #include <linux/mfd/max77693-common.h> 15c7f585feSJaewon Kim #include <linux/mfd/max77843-private.h> 16c7f585feSJaewon Kim #include <linux/of_device.h> 17c7f585feSJaewon Kim #include <linux/platform_device.h> 18c7f585feSJaewon Kim 19c7f585feSJaewon Kim static const struct mfd_cell max77843_devs[] = { 20c7f585feSJaewon Kim { 21c7f585feSJaewon Kim .name = "max77843-muic", 22c7f585feSJaewon Kim .of_compatible = "maxim,max77843-muic", 23c7f585feSJaewon Kim }, { 24c7f585feSJaewon Kim .name = "max77843-regulator", 25c7f585feSJaewon Kim .of_compatible = "maxim,max77843-regulator", 26c7f585feSJaewon Kim }, { 27c7f585feSJaewon Kim .name = "max77843-charger", 28c7f585feSJaewon Kim .of_compatible = "maxim,max77843-charger" 29c7f585feSJaewon Kim }, { 30c7f585feSJaewon Kim .name = "max77843-fuelgauge", 31c7f585feSJaewon Kim .of_compatible = "maxim,max77843-fuelgauge", 32c7f585feSJaewon Kim }, { 33c7f585feSJaewon Kim .name = "max77843-haptic", 34c7f585feSJaewon Kim .of_compatible = "maxim,max77843-haptic", 35c7f585feSJaewon Kim }, 36c7f585feSJaewon Kim }; 37c7f585feSJaewon Kim 38c7f585feSJaewon Kim static const struct regmap_config max77843_charger_regmap_config = { 39c7f585feSJaewon Kim .reg_bits = 8, 40c7f585feSJaewon Kim .val_bits = 8, 41c7f585feSJaewon Kim .max_register = MAX77843_CHG_REG_END, 42c7f585feSJaewon Kim }; 43c7f585feSJaewon Kim 44c7f585feSJaewon Kim static const struct regmap_config max77843_regmap_config = { 45c7f585feSJaewon Kim .reg_bits = 8, 46c7f585feSJaewon Kim .val_bits = 8, 47c7f585feSJaewon Kim .max_register = MAX77843_SYS_REG_END, 48c7f585feSJaewon Kim }; 49c7f585feSJaewon Kim 50c7f585feSJaewon Kim static const struct regmap_irq max77843_irqs[] = { 51c7f585feSJaewon Kim /* TOPSYS interrupts */ 52c7f585feSJaewon Kim { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, }, 53c7f585feSJaewon Kim { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, }, 54c7f585feSJaewon Kim { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, }, 55c7f585feSJaewon Kim { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, }, 56c7f585feSJaewon Kim }; 57c7f585feSJaewon Kim 58c7f585feSJaewon Kim static const struct regmap_irq_chip max77843_irq_chip = { 59c7f585feSJaewon Kim .name = "max77843", 60c7f585feSJaewon Kim .status_base = MAX77843_SYS_REG_SYSINTSRC, 61c7f585feSJaewon Kim .mask_base = MAX77843_SYS_REG_SYSINTMASK, 62c7f585feSJaewon Kim .mask_invert = false, 63c7f585feSJaewon Kim .num_regs = 1, 64c7f585feSJaewon Kim .irqs = max77843_irqs, 65c7f585feSJaewon Kim .num_irqs = ARRAY_SIZE(max77843_irqs), 66c7f585feSJaewon Kim }; 67c7f585feSJaewon Kim 68c7f585feSJaewon Kim /* Charger and Charger regulator use same regmap. */ 69bc1aadc1SKrzysztof Kozlowski static int max77843_chg_init(struct max77693_dev *max77843) 70c7f585feSJaewon Kim { 71c7f585feSJaewon Kim int ret; 72c7f585feSJaewon Kim 730005a9e1SWolfram Sang max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG); 740005a9e1SWolfram Sang if (IS_ERR(max77843->i2c_chg)) { 75c7f585feSJaewon Kim dev_err(&max77843->i2c->dev, 76c7f585feSJaewon Kim "Cannot allocate I2C device for Charger\n"); 770005a9e1SWolfram Sang return PTR_ERR(max77843->i2c_chg); 78c7f585feSJaewon Kim } 79c7f585feSJaewon Kim i2c_set_clientdata(max77843->i2c_chg, max77843); 80c7f585feSJaewon Kim 81c7f585feSJaewon Kim max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg, 82c7f585feSJaewon Kim &max77843_charger_regmap_config); 83c7f585feSJaewon Kim if (IS_ERR(max77843->regmap_chg)) { 84c7f585feSJaewon Kim ret = PTR_ERR(max77843->regmap_chg); 85c7f585feSJaewon Kim goto err_chg_i2c; 86c7f585feSJaewon Kim } 87c7f585feSJaewon Kim 88c7f585feSJaewon Kim return 0; 89c7f585feSJaewon Kim 90c7f585feSJaewon Kim err_chg_i2c: 91c7f585feSJaewon Kim i2c_unregister_device(max77843->i2c_chg); 92c7f585feSJaewon Kim 93c7f585feSJaewon Kim return ret; 94c7f585feSJaewon Kim } 95c7f585feSJaewon Kim 96*13c6de60SUwe Kleine-König static int max77843_probe(struct i2c_client *i2c) 97c7f585feSJaewon Kim { 98*13c6de60SUwe Kleine-König const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 99bc1aadc1SKrzysztof Kozlowski struct max77693_dev *max77843; 100c7f585feSJaewon Kim unsigned int reg_data; 101c7f585feSJaewon Kim int ret; 102c7f585feSJaewon Kim 103c7f585feSJaewon Kim max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL); 104c7f585feSJaewon Kim if (!max77843) 105c7f585feSJaewon Kim return -ENOMEM; 106c7f585feSJaewon Kim 107c7f585feSJaewon Kim i2c_set_clientdata(i2c, max77843); 108c7f585feSJaewon Kim max77843->dev = &i2c->dev; 109c7f585feSJaewon Kim max77843->i2c = i2c; 110c7f585feSJaewon Kim max77843->irq = i2c->irq; 111bc1aadc1SKrzysztof Kozlowski max77843->type = id->driver_data; 112c7f585feSJaewon Kim 113c7f585feSJaewon Kim max77843->regmap = devm_regmap_init_i2c(i2c, 114c7f585feSJaewon Kim &max77843_regmap_config); 115c7f585feSJaewon Kim if (IS_ERR(max77843->regmap)) { 116c7f585feSJaewon Kim dev_err(&i2c->dev, "Failed to allocate topsys register map\n"); 117c7f585feSJaewon Kim return PTR_ERR(max77843->regmap); 118c7f585feSJaewon Kim } 119c7f585feSJaewon Kim 120c7f585feSJaewon Kim ret = regmap_add_irq_chip(max77843->regmap, max77843->irq, 121c7f585feSJaewon Kim IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, 122bc1aadc1SKrzysztof Kozlowski 0, &max77843_irq_chip, &max77843->irq_data_topsys); 123c7f585feSJaewon Kim if (ret) { 124c7f585feSJaewon Kim dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n"); 125c7f585feSJaewon Kim return ret; 126c7f585feSJaewon Kim } 127c7f585feSJaewon Kim 128c7f585feSJaewon Kim ret = regmap_read(max77843->regmap, 129c7f585feSJaewon Kim MAX77843_SYS_REG_PMICID, ®_data); 130c7f585feSJaewon Kim if (ret < 0) { 131c7f585feSJaewon Kim dev_err(&i2c->dev, "Failed to read PMIC ID\n"); 132c7f585feSJaewon Kim goto err_pmic_id; 133c7f585feSJaewon Kim } 134c7f585feSJaewon Kim dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data); 135c7f585feSJaewon Kim 136c7f585feSJaewon Kim ret = max77843_chg_init(max77843); 137c7f585feSJaewon Kim if (ret) { 138c7f585feSJaewon Kim dev_err(&i2c->dev, "Failed to init Charger\n"); 139c7f585feSJaewon Kim goto err_pmic_id; 140c7f585feSJaewon Kim } 141c7f585feSJaewon Kim 142c7f585feSJaewon Kim ret = regmap_update_bits(max77843->regmap, 143c7f585feSJaewon Kim MAX77843_SYS_REG_INTSRCMASK, 144c7f585feSJaewon Kim MAX77843_INTSRC_MASK_MASK, 145c7f585feSJaewon Kim (unsigned int)~MAX77843_INTSRC_MASK_MASK); 146c7f585feSJaewon Kim if (ret < 0) { 147c7f585feSJaewon Kim dev_err(&i2c->dev, "Failed to unmask interrupt source\n"); 148c7f585feSJaewon Kim goto err_pmic_id; 149c7f585feSJaewon Kim } 150c7f585feSJaewon Kim 151c7f585feSJaewon Kim ret = mfd_add_devices(max77843->dev, -1, max77843_devs, 152c7f585feSJaewon Kim ARRAY_SIZE(max77843_devs), NULL, 0, NULL); 153c7f585feSJaewon Kim if (ret < 0) { 154c7f585feSJaewon Kim dev_err(&i2c->dev, "Failed to add mfd device\n"); 155c7f585feSJaewon Kim goto err_pmic_id; 156c7f585feSJaewon Kim } 157c7f585feSJaewon Kim 158c7f585feSJaewon Kim device_init_wakeup(max77843->dev, true); 159c7f585feSJaewon Kim 160c7f585feSJaewon Kim return 0; 161c7f585feSJaewon Kim 162c7f585feSJaewon Kim err_pmic_id: 163bc1aadc1SKrzysztof Kozlowski regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys); 164c7f585feSJaewon Kim 165c7f585feSJaewon Kim return ret; 166c7f585feSJaewon Kim } 167c7f585feSJaewon Kim 168c7f585feSJaewon Kim static const struct of_device_id max77843_dt_match[] = { 169c7f585feSJaewon Kim { .compatible = "maxim,max77843", }, 170c7f585feSJaewon Kim { }, 171c7f585feSJaewon Kim }; 172c7f585feSJaewon Kim 173c7f585feSJaewon Kim static const struct i2c_device_id max77843_id[] = { 174bc1aadc1SKrzysztof Kozlowski { "max77843", TYPE_MAX77843, }, 175c7f585feSJaewon Kim { }, 176c7f585feSJaewon Kim }; 177c7f585feSJaewon Kim 178c7f585feSJaewon Kim static int __maybe_unused max77843_suspend(struct device *dev) 179c7f585feSJaewon Kim { 1801b5420e1SGeliang Tang struct i2c_client *i2c = to_i2c_client(dev); 181bc1aadc1SKrzysztof Kozlowski struct max77693_dev *max77843 = i2c_get_clientdata(i2c); 182c7f585feSJaewon Kim 183c7f585feSJaewon Kim disable_irq(max77843->irq); 184c7f585feSJaewon Kim if (device_may_wakeup(dev)) 185c7f585feSJaewon Kim enable_irq_wake(max77843->irq); 186c7f585feSJaewon Kim 187c7f585feSJaewon Kim return 0; 188c7f585feSJaewon Kim } 189c7f585feSJaewon Kim 190c7f585feSJaewon Kim static int __maybe_unused max77843_resume(struct device *dev) 191c7f585feSJaewon Kim { 1921b5420e1SGeliang Tang struct i2c_client *i2c = to_i2c_client(dev); 193bc1aadc1SKrzysztof Kozlowski struct max77693_dev *max77843 = i2c_get_clientdata(i2c); 194c7f585feSJaewon Kim 195c7f585feSJaewon Kim if (device_may_wakeup(dev)) 196c7f585feSJaewon Kim disable_irq_wake(max77843->irq); 197c7f585feSJaewon Kim enable_irq(max77843->irq); 198c7f585feSJaewon Kim 199c7f585feSJaewon Kim return 0; 200c7f585feSJaewon Kim } 201c7f585feSJaewon Kim 202c7f585feSJaewon Kim static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume); 203c7f585feSJaewon Kim 204c7f585feSJaewon Kim static struct i2c_driver max77843_i2c_driver = { 205c7f585feSJaewon Kim .driver = { 206c7f585feSJaewon Kim .name = "max77843", 207c7f585feSJaewon Kim .pm = &max77843_pm, 208c7f585feSJaewon Kim .of_match_table = max77843_dt_match, 20938f70da3SPaul Gortmaker .suppress_bind_attrs = true, 210c7f585feSJaewon Kim }, 211*13c6de60SUwe Kleine-König .probe_new = max77843_probe, 212c7f585feSJaewon Kim .id_table = max77843_id, 213c7f585feSJaewon Kim }; 214c7f585feSJaewon Kim 215c7f585feSJaewon Kim static int __init max77843_i2c_init(void) 216c7f585feSJaewon Kim { 217c7f585feSJaewon Kim return i2c_add_driver(&max77843_i2c_driver); 218c7f585feSJaewon Kim } 219c7f585feSJaewon Kim subsys_initcall(max77843_i2c_init); 220