1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2022 Richtek Technology Corp. 4 * Author: ChiYuan Huang <cy_huang@richtek.com> 5 */ 6 7 #include <linux/i2c.h> 8 #include <linux/kernel.h> 9 #include <linux/mfd/core.h> 10 #include <linux/module.h> 11 #include <linux/regmap.h> 12 13 #define RT5120_REG_INTENABLE 0x1D 14 #define RT5120_REG_INTSTAT 0x1E 15 #define RT5120_REG_FZCMODE 0x44 16 17 #define RT5120_INT_HOTDIE 0 18 #define RT5120_INT_PWRKEY_REL 5 19 #define RT5120_INT_PWRKEY_PRESS 6 20 21 static const struct regmap_range rt5120_rd_yes_ranges[] = { 22 regmap_reg_range(0x03, 0x13), 23 regmap_reg_range(0x1c, 0x20), 24 regmap_reg_range(0x44, 0x44), 25 }; 26 27 static const struct regmap_range rt5120_wr_yes_ranges[] = { 28 regmap_reg_range(0x06, 0x13), 29 regmap_reg_range(0x1c, 0x20), 30 regmap_reg_range(0x44, 0x44), 31 }; 32 33 static const struct regmap_access_table rt5120_rd_table = { 34 .yes_ranges = rt5120_rd_yes_ranges, 35 .n_yes_ranges = ARRAY_SIZE(rt5120_rd_yes_ranges), 36 }; 37 38 static const struct regmap_access_table rt5120_wr_table = { 39 .yes_ranges = rt5120_wr_yes_ranges, 40 .n_yes_ranges = ARRAY_SIZE(rt5120_wr_yes_ranges), 41 }; 42 43 static const struct regmap_config rt5120_regmap_config = { 44 .reg_bits = 8, 45 .val_bits = 8, 46 .max_register = RT5120_REG_FZCMODE, 47 48 .wr_table = &rt5120_wr_table, 49 .rd_table = &rt5120_rd_table, 50 }; 51 52 static const struct regmap_irq rt5120_irqs[] = { 53 REGMAP_IRQ_REG_LINE(RT5120_INT_HOTDIE, 8), 54 REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_REL, 8), 55 REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_PRESS, 8), 56 }; 57 58 static const struct regmap_irq_chip rt5120_irq_chip = { 59 .name = "rt5120-pmic", 60 .status_base = RT5120_REG_INTSTAT, 61 .unmask_base = RT5120_REG_INTENABLE, 62 .ack_base = RT5120_REG_INTSTAT, 63 .use_ack = true, 64 .num_regs = 1, 65 .irqs = rt5120_irqs, 66 .num_irqs = ARRAY_SIZE(rt5120_irqs), 67 }; 68 69 static const struct resource rt5120_regulator_resources[] = { 70 DEFINE_RES_IRQ(RT5120_INT_HOTDIE), 71 }; 72 73 static const struct resource rt5120_pwrkey_resources[] = { 74 DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_PRESS, "pwrkey-press"), 75 DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_REL, "pwrkey-release"), 76 }; 77 78 static const struct mfd_cell rt5120_devs[] = { 79 MFD_CELL_RES("rt5120-regulator", rt5120_regulator_resources), 80 MFD_CELL_OF("rt5120-pwrkey", rt5120_pwrkey_resources, NULL, 0, 0, "richtek,rt5120-pwrkey"), 81 }; 82 83 static int rt5120_probe(struct i2c_client *i2c) 84 { 85 struct device *dev = &i2c->dev; 86 struct regmap *regmap; 87 struct regmap_irq_chip_data *irq_data; 88 int ret; 89 90 regmap = devm_regmap_init_i2c(i2c, &rt5120_regmap_config); 91 if (IS_ERR(regmap)) 92 return dev_err_probe(dev, PTR_ERR(regmap), 93 "Failed to init regmap\n"); 94 95 ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq, IRQF_ONESHOT, 0, 96 &rt5120_irq_chip, &irq_data); 97 if (ret) 98 return dev_err_probe(dev, ret, "Failed to add IRQ chip\n"); 99 100 return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, rt5120_devs, 101 ARRAY_SIZE(rt5120_devs), NULL, 0, 102 regmap_irq_get_domain(irq_data)); 103 } 104 105 static const struct of_device_id rt5120_device_match_table[] = { 106 { .compatible = "richtek,rt5120" }, 107 {} 108 }; 109 MODULE_DEVICE_TABLE(of, rt5120_device_match_table); 110 111 static struct i2c_driver rt5120_driver = { 112 .driver = { 113 .name = "rt5120", 114 .of_match_table = rt5120_device_match_table, 115 }, 116 .probe = rt5120_probe, 117 }; 118 module_i2c_driver(rt5120_driver); 119 120 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 121 MODULE_DESCRIPTION("Richtek RT5120 I2C driver"); 122 MODULE_LICENSE("GPL v2"); 123