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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 | // SPDX-License-Identifier: GPL-2.0-or-later // // Copyright (C) 2018 ROHM Semiconductors // // ROHM BD71837MWV PMIC driver // // Datasheet available from // https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e #include <linux/i2c.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/mfd/rohm-bd718x7.h> #include <linux/mfd/core.h> #include <linux/module.h> #include <linux/regmap.h> /* * gpio_keys.h requires definiton of bool. It is brought in * by above includes. Keep this as last until gpio_keys.h gets fixed. */ #include <linux/gpio_keys.h> static const u8 supported_revisions[] = { 0xA2 /* BD71837 */ }; static struct gpio_keys_button button = { .code = KEY_POWER, .gpio = -1, .type = EV_KEY, }; static struct gpio_keys_platform_data bd718xx_powerkey_data = { .buttons = &button, .nbuttons = 1, .name = "bd718xx-pwrkey", }; static struct mfd_cell bd71837_mfd_cells[] = { { .name = "gpio-keys", .platform_data = &bd718xx_powerkey_data, .pdata_size = sizeof(bd718xx_powerkey_data), }, { .name = "bd71837-clk", }, { .name = "bd71837-pmic", }, }; static const struct regmap_irq bd71837_irqs[] = { REGMAP_IRQ_REG(BD71837_INT_SWRST, 0, BD71837_INT_SWRST_MASK), REGMAP_IRQ_REG(BD71837_INT_PWRBTN_S, 0, BD71837_INT_PWRBTN_S_MASK), REGMAP_IRQ_REG(BD71837_INT_PWRBTN_L, 0, BD71837_INT_PWRBTN_L_MASK), REGMAP_IRQ_REG(BD71837_INT_PWRBTN, 0, BD71837_INT_PWRBTN_MASK), REGMAP_IRQ_REG(BD71837_INT_WDOG, 0, BD71837_INT_WDOG_MASK), REGMAP_IRQ_REG(BD71837_INT_ON_REQ, 0, BD71837_INT_ON_REQ_MASK), REGMAP_IRQ_REG(BD71837_INT_STBY_REQ, 0, BD71837_INT_STBY_REQ_MASK), }; static struct regmap_irq_chip bd71837_irq_chip = { .name = "bd71837-irq", .irqs = bd71837_irqs, .num_irqs = ARRAY_SIZE(bd71837_irqs), .num_regs = 1, .irq_reg_stride = 1, .status_base = BD71837_REG_IRQ, .mask_base = BD71837_REG_MIRQ, .ack_base = BD71837_REG_IRQ, .init_ack_masked = true, .mask_invert = false, }; static const struct regmap_range pmic_status_range = { .range_min = BD71837_REG_IRQ, .range_max = BD71837_REG_POW_STATE, }; static const struct regmap_access_table volatile_regs = { .yes_ranges = &pmic_status_range, .n_yes_ranges = 1, }; static const struct regmap_config bd71837_regmap_config = { .reg_bits = 8, .val_bits = 8, .volatile_table = &volatile_regs, .max_register = BD71837_MAX_REGISTER - 1, .cache_type = REGCACHE_RBTREE, }; static int bd71837_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct bd71837 *bd71837; int ret, i; unsigned int val; bd71837 = devm_kzalloc(&i2c->dev, sizeof(struct bd71837), GFP_KERNEL); if (!bd71837) return -ENOMEM; bd71837->chip_irq = i2c->irq; if (!bd71837->chip_irq) { dev_err(&i2c->dev, "No IRQ configured\n"); return -EINVAL; } bd71837->dev = &i2c->dev; dev_set_drvdata(&i2c->dev, bd71837); bd71837->regmap = devm_regmap_init_i2c(i2c, &bd71837_regmap_config); if (IS_ERR(bd71837->regmap)) { dev_err(&i2c->dev, "regmap initialization failed\n"); return PTR_ERR(bd71837->regmap); } ret = regmap_read(bd71837->regmap, BD71837_REG_REV, &val); if (ret) { dev_err(&i2c->dev, "Read BD71837_REG_DEVICE failed\n"); return ret; } for (i = 0; i < ARRAY_SIZE(supported_revisions); i++) if (supported_revisions[i] == val) break; if (i == ARRAY_SIZE(supported_revisions)) { dev_err(&i2c->dev, "Unsupported chip revision\n"); return -ENODEV; } ret = devm_regmap_add_irq_chip(&i2c->dev, bd71837->regmap, bd71837->chip_irq, IRQF_ONESHOT, 0, &bd71837_irq_chip, &bd71837->irq_data); if (ret) { dev_err(&i2c->dev, "Failed to add irq_chip\n"); return ret; } /* Configure short press to 10 milliseconds */ ret = regmap_update_bits(bd71837->regmap, BD71837_REG_PWRONCONFIG0, BD718XX_PWRBTN_PRESS_DURATION_MASK, BD718XX_PWRBTN_SHORT_PRESS_10MS); if (ret) { dev_err(&i2c->dev, "Failed to configure button short press timeout\n"); return ret; } /* Configure long press to 10 seconds */ ret = regmap_update_bits(bd71837->regmap, BD71837_REG_PWRONCONFIG1, BD718XX_PWRBTN_PRESS_DURATION_MASK, BD718XX_PWRBTN_LONG_PRESS_10S); if (ret) { dev_err(&i2c->dev, "Failed to configure button long press timeout\n"); return ret; } ret = regmap_irq_get_virq(bd71837->irq_data, BD71837_INT_PWRBTN_S); if (ret < 0) { dev_err(&i2c->dev, "Failed to get the IRQ\n"); return ret; } button.irq = ret; ret = devm_mfd_add_devices(bd71837->dev, PLATFORM_DEVID_AUTO, bd71837_mfd_cells, ARRAY_SIZE(bd71837_mfd_cells), NULL, 0, regmap_irq_get_domain(bd71837->irq_data)); if (ret) dev_err(&i2c->dev, "Failed to create subdevices\n"); return ret; } static const struct of_device_id bd71837_of_match[] = { { .compatible = "rohm,bd71837", }, { } }; MODULE_DEVICE_TABLE(of, bd71837_of_match); static struct i2c_driver bd71837_i2c_driver = { .driver = { .name = "rohm-bd718x7", .of_match_table = bd71837_of_match, }, .probe = bd71837_i2c_probe, }; static int __init bd71837_i2c_init(void) { return i2c_add_driver(&bd71837_i2c_driver); } /* Initialise early so consumer devices can complete system boot */ subsys_initcall(bd71837_i2c_init); static void __exit bd71837_i2c_exit(void) { i2c_del_driver(&bd71837_i2c_driver); } module_exit(bd71837_i2c_exit); MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); MODULE_DESCRIPTION("ROHM BD71837 Power Management IC driver"); MODULE_LICENSE("GPL"); |