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 bd718xx_mfd_cells[] = { 34 { 35 .name = "gpio-keys", 36 .platform_data = &bd718xx_powerkey_data, 37 .pdata_size = sizeof(bd718xx_powerkey_data), 38 }, 39 { .name = "bd718xx-clk", }, 40 { .name = "bd718xx-pmic", }, 41 }; 42 43 static const struct regmap_irq bd718xx_irqs[] = { 44 REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK), 45 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK), 46 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK), 47 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK), 48 REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK), 49 REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK), 50 REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK), 51 }; 52 53 static struct regmap_irq_chip bd718xx_irq_chip = { 54 .name = "bd718xx-irq", 55 .irqs = bd718xx_irqs, 56 .num_irqs = ARRAY_SIZE(bd718xx_irqs), 57 .num_regs = 1, 58 .irq_reg_stride = 1, 59 .status_base = BD718XX_REG_IRQ, 60 .mask_base = BD718XX_REG_MIRQ, 61 .ack_base = BD718XX_REG_IRQ, 62 .init_ack_masked = true, 63 .mask_invert = false, 64 }; 65 66 static const struct regmap_range pmic_status_range = { 67 .range_min = BD718XX_REG_IRQ, 68 .range_max = BD718XX_REG_POW_STATE, 69 }; 70 71 static const struct regmap_access_table volatile_regs = { 72 .yes_ranges = &pmic_status_range, 73 .n_yes_ranges = 1, 74 }; 75 76 static const struct regmap_config bd718xx_regmap_config = { 77 .reg_bits = 8, 78 .val_bits = 8, 79 .volatile_table = &volatile_regs, 80 .max_register = BD718XX_MAX_REGISTER - 1, 81 .cache_type = REGCACHE_RBTREE, 82 }; 83 84 static int bd718xx_init_press_duration(struct bd718xx *bd718xx) 85 { 86 struct device* dev = bd718xx->chip.dev; 87 u32 short_press_ms, long_press_ms; 88 u32 short_press_value, long_press_value; 89 int ret; 90 91 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", 92 &short_press_ms); 93 if (!ret) { 94 short_press_value = min(15u, (short_press_ms + 250) / 500); 95 ret = regmap_update_bits(bd718xx->chip.regmap, 96 BD718XX_REG_PWRONCONFIG0, 97 BD718XX_PWRBTN_PRESS_DURATION_MASK, 98 short_press_value); 99 if (ret) { 100 dev_err(dev, "Failed to init pwron short press\n"); 101 return ret; 102 } 103 } 104 105 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", 106 &long_press_ms); 107 if (!ret) { 108 long_press_value = min(15u, (long_press_ms + 500) / 1000); 109 ret = regmap_update_bits(bd718xx->chip.regmap, 110 BD718XX_REG_PWRONCONFIG1, 111 BD718XX_PWRBTN_PRESS_DURATION_MASK, 112 long_press_value); 113 if (ret) { 114 dev_err(dev, "Failed to init pwron long press\n"); 115 return ret; 116 } 117 } 118 119 return 0; 120 } 121 122 static int bd718xx_i2c_probe(struct i2c_client *i2c, 123 const struct i2c_device_id *id) 124 { 125 struct bd718xx *bd718xx; 126 int ret; 127 128 if (!i2c->irq) { 129 dev_err(&i2c->dev, "No IRQ configured\n"); 130 return -EINVAL; 131 } 132 133 bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL); 134 135 if (!bd718xx) 136 return -ENOMEM; 137 138 bd718xx->chip_irq = i2c->irq; 139 bd718xx->chip.chip_type = (unsigned int)(uintptr_t) 140 of_device_get_match_data(&i2c->dev); 141 bd718xx->chip.dev = &i2c->dev; 142 dev_set_drvdata(&i2c->dev, bd718xx); 143 144 bd718xx->chip.regmap = devm_regmap_init_i2c(i2c, 145 &bd718xx_regmap_config); 146 if (IS_ERR(bd718xx->chip.regmap)) { 147 dev_err(&i2c->dev, "regmap initialization failed\n"); 148 return PTR_ERR(bd718xx->chip.regmap); 149 } 150 151 ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap, 152 bd718xx->chip_irq, IRQF_ONESHOT, 0, 153 &bd718xx_irq_chip, &bd718xx->irq_data); 154 if (ret) { 155 dev_err(&i2c->dev, "Failed to add irq_chip\n"); 156 return ret; 157 } 158 159 ret = bd718xx_init_press_duration(bd718xx); 160 if (ret) 161 return ret; 162 163 ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S); 164 165 if (ret < 0) { 166 dev_err(&i2c->dev, "Failed to get the IRQ\n"); 167 return ret; 168 } 169 170 button.irq = ret; 171 172 ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO, 173 bd718xx_mfd_cells, 174 ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0, 175 regmap_irq_get_domain(bd718xx->irq_data)); 176 if (ret) 177 dev_err(&i2c->dev, "Failed to create subdevices\n"); 178 179 return ret; 180 } 181 182 static const struct of_device_id bd718xx_of_match[] = { 183 { 184 .compatible = "rohm,bd71837", 185 .data = (void *)ROHM_CHIP_TYPE_BD71837, 186 }, 187 { 188 .compatible = "rohm,bd71847", 189 .data = (void *)ROHM_CHIP_TYPE_BD71847, 190 }, 191 { } 192 }; 193 MODULE_DEVICE_TABLE(of, bd718xx_of_match); 194 195 static struct i2c_driver bd718xx_i2c_driver = { 196 .driver = { 197 .name = "rohm-bd718x7", 198 .of_match_table = bd718xx_of_match, 199 }, 200 .probe = bd718xx_i2c_probe, 201 }; 202 203 static int __init bd718xx_i2c_init(void) 204 { 205 return i2c_add_driver(&bd718xx_i2c_driver); 206 } 207 208 /* Initialise early so consumer devices can complete system boot */ 209 subsys_initcall(bd718xx_i2c_init); 210 211 static void __exit bd718xx_i2c_exit(void) 212 { 213 i2c_del_driver(&bd718xx_i2c_driver); 214 } 215 module_exit(bd718xx_i2c_exit); 216 217 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); 218 MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); 219 MODULE_LICENSE("GPL"); 220