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_device.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 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 .range_min = BD718XX_REG_IRQ, 77 .range_max = BD718XX_REG_POW_STATE, 78 }; 79 80 static const struct regmap_access_table volatile_regs = { 81 .yes_ranges = &pmic_status_range, 82 .n_yes_ranges = 1, 83 }; 84 85 static const struct regmap_config bd718xx_regmap_config = { 86 .reg_bits = 8, 87 .val_bits = 8, 88 .volatile_table = &volatile_regs, 89 .max_register = BD718XX_MAX_REGISTER - 1, 90 .cache_type = REGCACHE_RBTREE, 91 }; 92 93 static int bd718xx_init_press_duration(struct regmap *regmap, 94 struct device *dev) 95 { 96 u32 short_press_ms, long_press_ms; 97 u32 short_press_value, long_press_value; 98 int ret; 99 100 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", 101 &short_press_ms); 102 if (!ret) { 103 short_press_value = min(15u, (short_press_ms + 250) / 500); 104 ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG0, 105 BD718XX_PWRBTN_PRESS_DURATION_MASK, 106 short_press_value); 107 if (ret) { 108 dev_err(dev, "Failed to init pwron short press\n"); 109 return ret; 110 } 111 } 112 113 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", 114 &long_press_ms); 115 if (!ret) { 116 long_press_value = min(15u, (long_press_ms + 500) / 1000); 117 ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG1, 118 BD718XX_PWRBTN_PRESS_DURATION_MASK, 119 long_press_value); 120 if (ret) { 121 dev_err(dev, "Failed to init pwron long press\n"); 122 return ret; 123 } 124 } 125 126 return 0; 127 } 128 129 static int bd718xx_i2c_probe(struct i2c_client *i2c) 130 { 131 struct regmap *regmap; 132 struct regmap_irq_chip_data *irq_data; 133 int ret; 134 unsigned int chip_type; 135 struct mfd_cell *mfd; 136 int cells; 137 138 if (!i2c->irq) { 139 dev_err(&i2c->dev, "No IRQ configured\n"); 140 return -EINVAL; 141 } 142 chip_type = (unsigned int)(uintptr_t) 143 of_device_get_match_data(&i2c->dev); 144 switch (chip_type) { 145 case ROHM_CHIP_TYPE_BD71837: 146 mfd = bd71837_mfd_cells; 147 cells = ARRAY_SIZE(bd71837_mfd_cells); 148 break; 149 case ROHM_CHIP_TYPE_BD71847: 150 mfd = bd71847_mfd_cells; 151 cells = ARRAY_SIZE(bd71847_mfd_cells); 152 break; 153 default: 154 dev_err(&i2c->dev, "Unknown device type"); 155 return -EINVAL; 156 } 157 158 regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config); 159 if (IS_ERR(regmap)) 160 return dev_err_probe(&i2c->dev, PTR_ERR(regmap), 161 "regmap initialization failed\n"); 162 163 ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq, 164 IRQF_ONESHOT, 0, &bd718xx_irq_chip, 165 &irq_data); 166 if (ret) 167 return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n"); 168 169 ret = bd718xx_init_press_duration(regmap, &i2c->dev); 170 if (ret) 171 return ret; 172 173 ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S); 174 175 if (ret < 0) 176 return dev_err_probe(&i2c->dev, ret, "Failed to get the IRQ\n"); 177 178 button.irq = ret; 179 180 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, 181 mfd, cells, NULL, 0, 182 regmap_irq_get_domain(irq_data)); 183 if (ret) 184 dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n"); 185 186 return ret; 187 } 188 189 static const struct of_device_id bd718xx_of_match[] = { 190 { 191 .compatible = "rohm,bd71837", 192 .data = (void *)ROHM_CHIP_TYPE_BD71837, 193 }, 194 { 195 .compatible = "rohm,bd71847", 196 .data = (void *)ROHM_CHIP_TYPE_BD71847, 197 }, 198 { 199 .compatible = "rohm,bd71850", 200 .data = (void *)ROHM_CHIP_TYPE_BD71847, 201 }, 202 { } 203 }; 204 MODULE_DEVICE_TABLE(of, bd718xx_of_match); 205 206 static struct i2c_driver bd718xx_i2c_driver = { 207 .driver = { 208 .name = "rohm-bd718x7", 209 .of_match_table = bd718xx_of_match, 210 }, 211 .probe = bd718xx_i2c_probe, 212 }; 213 214 static int __init bd718xx_i2c_init(void) 215 { 216 return i2c_add_driver(&bd718xx_i2c_driver); 217 } 218 219 /* Initialise early so consumer devices can complete system boot */ 220 subsys_initcall(bd718xx_i2c_init); 221 222 static void __exit bd718xx_i2c_exit(void) 223 { 224 i2c_del_driver(&bd718xx_i2c_driver); 225 } 226 module_exit(bd718xx_i2c_exit); 227 228 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); 229 MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); 230 MODULE_LICENSE("GPL"); 231