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/gpio_keys.h> 11 #include <linux/i2c.h> 12 #include <linux/input.h> 13 #include <linux/interrupt.h> 14 #include <linux/mfd/rohm-bd718x7.h> 15 #include <linux/mfd/core.h> 16 #include <linux/module.h> 17 #include <linux/of.h> 18 #include <linux/regmap.h> 19 #include <linux/types.h> 20 21 static struct gpio_keys_button button = { 22 .code = KEY_POWER, 23 .gpio = -1, 24 .type = EV_KEY, 25 }; 26 27 static struct gpio_keys_platform_data bd718xx_powerkey_data = { 28 .buttons = &button, 29 .nbuttons = 1, 30 .name = "bd718xx-pwrkey", 31 }; 32 33 static struct mfd_cell bd71837_mfd_cells[] = { 34 { 35 .name = "gpio-keys", 36 .platform_data = &bd718xx_powerkey_data, 37 .pdata_size = sizeof(bd718xx_powerkey_data), 38 }, 39 { .name = "bd71837-clk", }, 40 { .name = "bd71837-pmic", }, 41 }; 42 43 static struct mfd_cell bd71847_mfd_cells[] = { 44 { 45 .name = "gpio-keys", 46 .platform_data = &bd718xx_powerkey_data, 47 .pdata_size = sizeof(bd718xx_powerkey_data), 48 }, 49 { .name = "bd71847-clk", }, 50 { .name = "bd71847-pmic", }, 51 }; 52 53 static const struct regmap_irq bd718xx_irqs[] = { 54 REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK), 55 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK), 56 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK), 57 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK), 58 REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK), 59 REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK), 60 REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK), 61 }; 62 63 static const struct regmap_irq_chip bd718xx_irq_chip = { 64 .name = "bd718xx-irq", 65 .irqs = bd718xx_irqs, 66 .num_irqs = ARRAY_SIZE(bd718xx_irqs), 67 .num_regs = 1, 68 .irq_reg_stride = 1, 69 .status_base = BD718XX_REG_IRQ, 70 .mask_base = BD718XX_REG_MIRQ, 71 .ack_base = BD718XX_REG_IRQ, 72 .init_ack_masked = true, 73 }; 74 75 static const struct regmap_range pmic_status_range[] = { 76 regmap_reg_range(BD718XX_REG_IRQ, BD718XX_REG_POW_STATE), 77 }; 78 79 static const struct regmap_access_table volatile_regs = { 80 .yes_ranges = &pmic_status_range[0], 81 .n_yes_ranges = ARRAY_SIZE(pmic_status_range), 82 }; 83 84 static const struct regmap_config bd718xx_regmap_config = { 85 .reg_bits = 8, 86 .val_bits = 8, 87 .volatile_table = &volatile_regs, 88 .max_register = BD718XX_MAX_REGISTER - 1, 89 .cache_type = REGCACHE_MAPLE, 90 }; 91 92 static int bd718xx_init_press_duration(struct regmap *regmap, 93 struct device *dev) 94 { 95 u32 short_press_ms, long_press_ms; 96 u32 short_press_value, long_press_value; 97 int ret; 98 99 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", 100 &short_press_ms); 101 if (!ret) { 102 short_press_value = min(15u, (short_press_ms + 250) / 500); 103 ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG0, 104 BD718XX_PWRBTN_PRESS_DURATION_MASK, 105 short_press_value); 106 if (ret) { 107 dev_err(dev, "Failed to init pwron short press\n"); 108 return ret; 109 } 110 } 111 112 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", 113 &long_press_ms); 114 if (!ret) { 115 long_press_value = min(15u, (long_press_ms + 500) / 1000); 116 ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG1, 117 BD718XX_PWRBTN_PRESS_DURATION_MASK, 118 long_press_value); 119 if (ret) { 120 dev_err(dev, "Failed to init pwron long press\n"); 121 return ret; 122 } 123 } 124 125 return 0; 126 } 127 128 static int bd718xx_i2c_probe(struct i2c_client *i2c) 129 { 130 struct regmap *regmap; 131 struct regmap_irq_chip_data *irq_data; 132 int ret; 133 unsigned int chip_type; 134 struct mfd_cell *mfd; 135 int cells; 136 137 if (!i2c->irq) { 138 dev_err(&i2c->dev, "No IRQ configured\n"); 139 return -EINVAL; 140 } 141 chip_type = (unsigned int)(uintptr_t) 142 of_device_get_match_data(&i2c->dev); 143 switch (chip_type) { 144 case ROHM_CHIP_TYPE_BD71837: 145 mfd = bd71837_mfd_cells; 146 cells = ARRAY_SIZE(bd71837_mfd_cells); 147 break; 148 case ROHM_CHIP_TYPE_BD71847: 149 mfd = bd71847_mfd_cells; 150 cells = ARRAY_SIZE(bd71847_mfd_cells); 151 break; 152 default: 153 dev_err(&i2c->dev, "Unknown device type"); 154 return -EINVAL; 155 } 156 157 regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config); 158 if (IS_ERR(regmap)) 159 return dev_err_probe(&i2c->dev, PTR_ERR(regmap), 160 "regmap initialization failed\n"); 161 162 ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq, 163 IRQF_ONESHOT, 0, &bd718xx_irq_chip, 164 &irq_data); 165 if (ret) 166 return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n"); 167 168 ret = bd718xx_init_press_duration(regmap, &i2c->dev); 169 if (ret) 170 return ret; 171 172 ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S); 173 174 if (ret < 0) 175 return dev_err_probe(&i2c->dev, ret, "Failed to get the IRQ\n"); 176 177 button.irq = ret; 178 179 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, 180 mfd, cells, NULL, 0, 181 regmap_irq_get_domain(irq_data)); 182 if (ret) 183 dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n"); 184 185 return ret; 186 } 187 188 static const struct of_device_id bd718xx_of_match[] = { 189 { 190 .compatible = "rohm,bd71837", 191 .data = (void *)ROHM_CHIP_TYPE_BD71837, 192 }, 193 { 194 .compatible = "rohm,bd71847", 195 .data = (void *)ROHM_CHIP_TYPE_BD71847, 196 }, 197 { 198 .compatible = "rohm,bd71850", 199 .data = (void *)ROHM_CHIP_TYPE_BD71847, 200 }, 201 { } 202 }; 203 MODULE_DEVICE_TABLE(of, bd718xx_of_match); 204 205 static struct i2c_driver bd718xx_i2c_driver = { 206 .driver = { 207 .name = "rohm-bd718x7", 208 .of_match_table = bd718xx_of_match, 209 }, 210 .probe = bd718xx_i2c_probe, 211 }; 212 213 static int __init bd718xx_i2c_init(void) 214 { 215 return i2c_add_driver(&bd718xx_i2c_driver); 216 } 217 218 /* Initialise early so consumer devices can complete system boot */ 219 subsys_initcall(bd718xx_i2c_init); 220 221 static void __exit bd718xx_i2c_exit(void) 222 { 223 i2c_del_driver(&bd718xx_i2c_driver); 224 } 225 module_exit(bd718xx_i2c_exit); 226 227 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); 228 MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); 229 MODULE_LICENSE("GPL"); 230