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 .mask_invert = false, 74 }; 75 76 static const struct regmap_range pmic_status_range = { 77 .range_min = BD718XX_REG_IRQ, 78 .range_max = BD718XX_REG_POW_STATE, 79 }; 80 81 static const struct regmap_access_table volatile_regs = { 82 .yes_ranges = &pmic_status_range, 83 .n_yes_ranges = 1, 84 }; 85 86 static const struct regmap_config bd718xx_regmap_config = { 87 .reg_bits = 8, 88 .val_bits = 8, 89 .volatile_table = &volatile_regs, 90 .max_register = BD718XX_MAX_REGISTER - 1, 91 .cache_type = REGCACHE_RBTREE, 92 }; 93 94 static int bd718xx_init_press_duration(struct bd718xx *bd718xx) 95 { 96 struct device* dev = bd718xx->chip.dev; 97 u32 short_press_ms, long_press_ms; 98 u32 short_press_value, long_press_value; 99 int ret; 100 101 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", 102 &short_press_ms); 103 if (!ret) { 104 short_press_value = min(15u, (short_press_ms + 250) / 500); 105 ret = regmap_update_bits(bd718xx->chip.regmap, 106 BD718XX_REG_PWRONCONFIG0, 107 BD718XX_PWRBTN_PRESS_DURATION_MASK, 108 short_press_value); 109 if (ret) { 110 dev_err(dev, "Failed to init pwron short press\n"); 111 return ret; 112 } 113 } 114 115 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", 116 &long_press_ms); 117 if (!ret) { 118 long_press_value = min(15u, (long_press_ms + 500) / 1000); 119 ret = regmap_update_bits(bd718xx->chip.regmap, 120 BD718XX_REG_PWRONCONFIG1, 121 BD718XX_PWRBTN_PRESS_DURATION_MASK, 122 long_press_value); 123 if (ret) { 124 dev_err(dev, "Failed to init pwron long press\n"); 125 return ret; 126 } 127 } 128 129 return 0; 130 } 131 132 static int bd718xx_i2c_probe(struct i2c_client *i2c, 133 const struct i2c_device_id *id) 134 { 135 struct bd718xx *bd718xx; 136 int ret; 137 unsigned int chip_type; 138 struct mfd_cell *mfd; 139 int cells; 140 141 if (!i2c->irq) { 142 dev_err(&i2c->dev, "No IRQ configured\n"); 143 return -EINVAL; 144 } 145 146 bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL); 147 148 if (!bd718xx) 149 return -ENOMEM; 150 151 bd718xx->chip_irq = i2c->irq; 152 chip_type = (unsigned int)(uintptr_t) 153 of_device_get_match_data(&i2c->dev); 154 switch (chip_type) { 155 case ROHM_CHIP_TYPE_BD71837: 156 mfd = bd71837_mfd_cells; 157 cells = ARRAY_SIZE(bd71837_mfd_cells); 158 break; 159 case ROHM_CHIP_TYPE_BD71847: 160 mfd = bd71847_mfd_cells; 161 cells = ARRAY_SIZE(bd71847_mfd_cells); 162 break; 163 default: 164 dev_err(&i2c->dev, "Unknown device type"); 165 return -EINVAL; 166 } 167 bd718xx->chip.dev = &i2c->dev; 168 dev_set_drvdata(&i2c->dev, bd718xx); 169 170 bd718xx->chip.regmap = devm_regmap_init_i2c(i2c, 171 &bd718xx_regmap_config); 172 if (IS_ERR(bd718xx->chip.regmap)) { 173 dev_err(&i2c->dev, "regmap initialization failed\n"); 174 return PTR_ERR(bd718xx->chip.regmap); 175 } 176 177 ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap, 178 bd718xx->chip_irq, IRQF_ONESHOT, 0, 179 &bd718xx_irq_chip, &bd718xx->irq_data); 180 if (ret) { 181 dev_err(&i2c->dev, "Failed to add irq_chip\n"); 182 return ret; 183 } 184 185 ret = bd718xx_init_press_duration(bd718xx); 186 if (ret) 187 return ret; 188 189 ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S); 190 191 if (ret < 0) { 192 dev_err(&i2c->dev, "Failed to get the IRQ\n"); 193 return ret; 194 } 195 196 button.irq = ret; 197 198 ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO, 199 mfd, cells, NULL, 0, 200 regmap_irq_get_domain(bd718xx->irq_data)); 201 if (ret) 202 dev_err(&i2c->dev, "Failed to create subdevices\n"); 203 204 return ret; 205 } 206 207 static const struct of_device_id bd718xx_of_match[] = { 208 { 209 .compatible = "rohm,bd71837", 210 .data = (void *)ROHM_CHIP_TYPE_BD71837, 211 }, 212 { 213 .compatible = "rohm,bd71847", 214 .data = (void *)ROHM_CHIP_TYPE_BD71847, 215 }, 216 { 217 .compatible = "rohm,bd71850", 218 .data = (void *)ROHM_CHIP_TYPE_BD71847, 219 }, 220 { } 221 }; 222 MODULE_DEVICE_TABLE(of, bd718xx_of_match); 223 224 static struct i2c_driver bd718xx_i2c_driver = { 225 .driver = { 226 .name = "rohm-bd718x7", 227 .of_match_table = bd718xx_of_match, 228 }, 229 .probe = bd718xx_i2c_probe, 230 }; 231 232 static int __init bd718xx_i2c_init(void) 233 { 234 return i2c_add_driver(&bd718xx_i2c_driver); 235 } 236 237 /* Initialise early so consumer devices can complete system boot */ 238 subsys_initcall(bd718xx_i2c_init); 239 240 static void __exit bd718xx_i2c_exit(void) 241 { 242 i2c_del_driver(&bd718xx_i2c_driver); 243 } 244 module_exit(bd718xx_i2c_exit); 245 246 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); 247 MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); 248 MODULE_LICENSE("GPL"); 249