1 // SPDX-License-Identifier: GPL-2.0-or-later 2 // 3 // Copyright (C) 2018 ROHM Semiconductors 4 // 5 // ROHM BD71837MWV and BD71847MWV PMIC driver 6 // 7 // Datasheet for BD71837MWV available from 8 // https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e 9 10 #include <linux/i2c.h> 11 #include <linux/input.h> 12 #include <linux/interrupt.h> 13 #include <linux/mfd/rohm-bd718x7.h> 14 #include <linux/mfd/core.h> 15 #include <linux/module.h> 16 #include <linux/of.h> 17 #include <linux/regmap.h> 18 #include <linux/types.h> 19 20 #include "rohm-pwrbutton.h" 21 22 static struct mfd_cell bd71837_mfd_cells[] = { 23 { .name = "bd71837-clk", }, 24 { .name = "bd71837-pmic", }, 25 }; 26 27 static struct mfd_cell bd71847_mfd_cells[] = { 28 { .name = "bd71847-clk", }, 29 { .name = "bd71847-pmic", }, 30 }; 31 32 static const struct regmap_irq bd718xx_irqs[] = { 33 REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK), 34 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK), 35 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK), 36 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK), 37 REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK), 38 REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK), 39 REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK), 40 }; 41 42 static const struct regmap_irq_chip bd718xx_irq_chip = { 43 .name = "bd718xx-irq", 44 .irqs = bd718xx_irqs, 45 .num_irqs = ARRAY_SIZE(bd718xx_irqs), 46 .num_regs = 1, 47 .irq_reg_stride = 1, 48 .status_base = BD718XX_REG_IRQ, 49 .mask_base = BD718XX_REG_MIRQ, 50 .ack_base = BD718XX_REG_IRQ, 51 .init_ack_masked = true, 52 }; 53 54 static const struct regmap_range pmic_status_range[] = { 55 regmap_reg_range(BD718XX_REG_IRQ, BD718XX_REG_POW_STATE), 56 }; 57 58 static const struct regmap_access_table volatile_regs = { 59 .yes_ranges = &pmic_status_range[0], 60 .n_yes_ranges = ARRAY_SIZE(pmic_status_range), 61 }; 62 63 static const struct regmap_config bd718xx_regmap_config = { 64 .reg_bits = 8, 65 .val_bits = 8, 66 .volatile_table = &volatile_regs, 67 .max_register = BD718XX_MAX_REGISTER - 1, 68 .cache_type = REGCACHE_MAPLE, 69 }; 70 71 static int bd718xx_init_press_duration(struct regmap *regmap, 72 struct device *dev) 73 { 74 u32 short_press_ms, long_press_ms; 75 u32 short_press_value, long_press_value; 76 int ret; 77 78 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", 79 &short_press_ms); 80 if (!ret) { 81 short_press_value = min(15u, (short_press_ms + 250) / 500); 82 ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG0, 83 BD718XX_PWRBTN_PRESS_DURATION_MASK, 84 short_press_value); 85 if (ret) { 86 dev_err(dev, "Failed to init pwron short press\n"); 87 return ret; 88 } 89 } 90 91 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", 92 &long_press_ms); 93 if (!ret) { 94 long_press_value = min(15u, (long_press_ms + 500) / 1000); 95 ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG1, 96 BD718XX_PWRBTN_PRESS_DURATION_MASK, 97 long_press_value); 98 if (ret) { 99 dev_err(dev, "Failed to init pwron long press\n"); 100 return ret; 101 } 102 } 103 104 return 0; 105 } 106 107 108 109 static int bd718xx_i2c_probe(struct i2c_client *i2c) 110 { 111 struct regmap *regmap; 112 struct regmap_irq_chip_data *irq_data; 113 struct irq_domain *irq_domain; 114 int ret; 115 unsigned int chip_type; 116 struct mfd_cell *mfd; 117 int cells; 118 119 if (!i2c->irq) { 120 dev_err(&i2c->dev, "No IRQ configured\n"); 121 return -EINVAL; 122 } 123 chip_type = (unsigned int)(uintptr_t) 124 of_device_get_match_data(&i2c->dev); 125 switch (chip_type) { 126 case ROHM_CHIP_TYPE_BD71837: 127 mfd = bd71837_mfd_cells; 128 cells = ARRAY_SIZE(bd71837_mfd_cells); 129 break; 130 case ROHM_CHIP_TYPE_BD71847: 131 mfd = bd71847_mfd_cells; 132 cells = ARRAY_SIZE(bd71847_mfd_cells); 133 break; 134 default: 135 dev_err(&i2c->dev, "Unknown device type"); 136 return -EINVAL; 137 } 138 139 regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config); 140 if (IS_ERR(regmap)) 141 return dev_err_probe(&i2c->dev, PTR_ERR(regmap), 142 "regmap initialization failed\n"); 143 144 ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq, 145 IRQF_ONESHOT, 0, &bd718xx_irq_chip, 146 &irq_data); 147 if (ret) 148 return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n"); 149 150 ret = bd718xx_init_press_duration(regmap, &i2c->dev); 151 if (ret) 152 return ret; 153 154 irq_domain = regmap_irq_get_domain(irq_data); 155 156 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, 157 mfd, cells, NULL, 0, irq_domain); 158 if (ret) 159 return dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n"); 160 161 ret = rohm_register_pwrbutton(&i2c->dev, BD718XX_INT_PWRBTN_S, 162 "bd718xx-pwrkey", false, irq_domain); 163 if (ret) 164 return ret; 165 166 return 0; 167 } 168 169 static const struct of_device_id bd718xx_of_match[] = { 170 { 171 .compatible = "rohm,bd71837", 172 .data = (void *)ROHM_CHIP_TYPE_BD71837, 173 }, 174 { 175 .compatible = "rohm,bd71847", 176 .data = (void *)ROHM_CHIP_TYPE_BD71847, 177 }, 178 { 179 .compatible = "rohm,bd71850", 180 .data = (void *)ROHM_CHIP_TYPE_BD71847, 181 }, 182 { } 183 }; 184 MODULE_DEVICE_TABLE(of, bd718xx_of_match); 185 186 static struct i2c_driver bd718xx_i2c_driver = { 187 .driver = { 188 .name = "rohm-bd718x7", 189 .of_match_table = bd718xx_of_match, 190 }, 191 .probe = bd718xx_i2c_probe, 192 }; 193 194 static int __init bd718xx_i2c_init(void) 195 { 196 return i2c_add_driver(&bd718xx_i2c_driver); 197 } 198 199 /* Initialise early so consumer devices can complete system boot */ 200 subsys_initcall(bd718xx_i2c_init); 201 202 static void __exit bd718xx_i2c_exit(void) 203 { 204 i2c_del_driver(&bd718xx_i2c_driver); 205 } 206 module_exit(bd718xx_i2c_exit); 207 208 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); 209 MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); 210 MODULE_LICENSE("GPL"); 211