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/mod_devicetable.h> 12 #include <linux/regmap.h> 13 14 #define RT5120_REG_INTENABLE 0x1D 15 #define RT5120_REG_INTSTAT 0x1E 16 #define RT5120_REG_FZCMODE 0x44 17 18 #define RT5120_INT_HOTDIE 0 19 #define RT5120_INT_PWRKEY_REL 5 20 #define RT5120_INT_PWRKEY_PRESS 6 21 22 static const struct regmap_range rt5120_rd_yes_ranges[] = { 23 regmap_reg_range(0x03, 0x13), 24 regmap_reg_range(0x1c, 0x20), 25 regmap_reg_range(0x44, 0x44), 26 }; 27 28 static const struct regmap_range rt5120_wr_yes_ranges[] = { 29 regmap_reg_range(0x06, 0x13), 30 regmap_reg_range(0x1c, 0x20), 31 regmap_reg_range(0x44, 0x44), 32 }; 33 34 static const struct regmap_access_table rt5120_rd_table = { 35 .yes_ranges = rt5120_rd_yes_ranges, 36 .n_yes_ranges = ARRAY_SIZE(rt5120_rd_yes_ranges), 37 }; 38 39 static const struct regmap_access_table rt5120_wr_table = { 40 .yes_ranges = rt5120_wr_yes_ranges, 41 .n_yes_ranges = ARRAY_SIZE(rt5120_wr_yes_ranges), 42 }; 43 44 static const struct regmap_config rt5120_regmap_config = { 45 .reg_bits = 8, 46 .val_bits = 8, 47 .max_register = RT5120_REG_FZCMODE, 48 49 .wr_table = &rt5120_wr_table, 50 .rd_table = &rt5120_rd_table, 51 }; 52 53 static const struct regmap_irq rt5120_irqs[] = { 54 REGMAP_IRQ_REG_LINE(RT5120_INT_HOTDIE, 8), 55 REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_REL, 8), 56 REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_PRESS, 8), 57 }; 58 59 static const struct regmap_irq_chip rt5120_irq_chip = { 60 .name = "rt5120-pmic", 61 .status_base = RT5120_REG_INTSTAT, 62 .unmask_base = RT5120_REG_INTENABLE, 63 .ack_base = RT5120_REG_INTSTAT, 64 .use_ack = true, 65 .num_regs = 1, 66 .irqs = rt5120_irqs, 67 .num_irqs = ARRAY_SIZE(rt5120_irqs), 68 }; 69 70 static const struct resource rt5120_regulator_resources[] = { 71 DEFINE_RES_IRQ(RT5120_INT_HOTDIE), 72 }; 73 74 static const struct resource rt5120_pwrkey_resources[] = { 75 DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_PRESS, "pwrkey-press"), 76 DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_REL, "pwrkey-release"), 77 }; 78 79 static const struct mfd_cell rt5120_devs[] = { 80 MFD_CELL_RES("rt5120-regulator", rt5120_regulator_resources), 81 MFD_CELL_OF("rt5120-pwrkey", rt5120_pwrkey_resources, NULL, 0, 0, "richtek,rt5120-pwrkey"), 82 }; 83 84 static int rt5120_probe(struct i2c_client *i2c) 85 { 86 struct device *dev = &i2c->dev; 87 struct regmap *regmap; 88 struct regmap_irq_chip_data *irq_data; 89 int ret; 90 91 regmap = devm_regmap_init_i2c(i2c, &rt5120_regmap_config); 92 if (IS_ERR(regmap)) 93 return dev_err_probe(dev, PTR_ERR(regmap), 94 "Failed to init regmap\n"); 95 96 ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq, IRQF_ONESHOT, 0, 97 &rt5120_irq_chip, &irq_data); 98 if (ret) 99 return dev_err_probe(dev, ret, "Failed to add IRQ chip\n"); 100 101 return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, rt5120_devs, 102 ARRAY_SIZE(rt5120_devs), NULL, 0, 103 regmap_irq_get_domain(irq_data)); 104 } 105 106 static const struct of_device_id rt5120_device_match_table[] = { 107 { .compatible = "richtek,rt5120" }, 108 {} 109 }; 110 MODULE_DEVICE_TABLE(of, rt5120_device_match_table); 111 112 static struct i2c_driver rt5120_driver = { 113 .driver = { 114 .name = "rt5120", 115 .of_match_table = rt5120_device_match_table, 116 }, 117 .probe = rt5120_probe, 118 }; 119 module_i2c_driver(rt5120_driver); 120 121 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 122 MODULE_DESCRIPTION("Richtek RT5120 I2C driver"); 123 MODULE_LICENSE("GPL v2"); 124