// SPDX-License-Identifier: GPL-2.0-only /* * Analog Devices ADP5585 I/O expander, PWM controller and keypad controller * * Copyright 2022 NXP * Copyright 2024 Ideas on Board Oy */ #include #include #include #include #include #include #include #include #include #include static const struct mfd_cell adp5585_devs[] = { { .name = "adp5585-gpio", }, { .name = "adp5585-pwm", }, }; static const struct regmap_range adp5585_volatile_ranges[] = { regmap_reg_range(ADP5585_ID, ADP5585_GPI_STATUS_B), }; static const struct regmap_access_table adp5585_volatile_regs = { .yes_ranges = adp5585_volatile_ranges, .n_yes_ranges = ARRAY_SIZE(adp5585_volatile_ranges), }; /* * Chip variants differ in the default configuration of pull-up and pull-down * resistors, and therefore have different default register values: * * - The -00, -01 and -03 variants (collectively referred to as * ADP5585_REGMAP_00) have pull-up on all GPIO pins by default. * - The -02 variant has no default pull-up or pull-down resistors. * - The -04 variant has default pull-down resistors on all GPIO pins. */ static const u8 adp5585_regmap_defaults_00[ADP5585_MAX_REG + 1] = { /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, }; static const u8 adp5585_regmap_defaults_02[ADP5585_MAX_REG + 1] = { /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, /* 0x18 */ 0x03, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, }; static const u8 adp5585_regmap_defaults_04[ADP5585_MAX_REG + 1] = { /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, /* 0x18 */ 0x05, 0x55, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, }; enum adp5585_regmap_type { ADP5585_REGMAP_00, ADP5585_REGMAP_02, ADP5585_REGMAP_04, }; static const struct regmap_config adp5585_regmap_configs[] = { [ADP5585_REGMAP_00] = { .reg_bits = 8, .val_bits = 8, .max_register = ADP5585_MAX_REG, .volatile_table = &adp5585_volatile_regs, .cache_type = REGCACHE_MAPLE, .reg_defaults_raw = adp5585_regmap_defaults_00, .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_00), }, [ADP5585_REGMAP_02] = { .reg_bits = 8, .val_bits = 8, .max_register = ADP5585_MAX_REG, .volatile_table = &adp5585_volatile_regs, .cache_type = REGCACHE_MAPLE, .reg_defaults_raw = adp5585_regmap_defaults_02, .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_02), }, [ADP5585_REGMAP_04] = { .reg_bits = 8, .val_bits = 8, .max_register = ADP5585_MAX_REG, .volatile_table = &adp5585_volatile_regs, .cache_type = REGCACHE_MAPLE, .reg_defaults_raw = adp5585_regmap_defaults_04, .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_04), }, }; static int adp5585_i2c_probe(struct i2c_client *i2c) { const struct regmap_config *regmap_config; struct adp5585_dev *adp5585; unsigned int id; int ret; adp5585 = devm_kzalloc(&i2c->dev, sizeof(*adp5585), GFP_KERNEL); if (!adp5585) return -ENOMEM; i2c_set_clientdata(i2c, adp5585); regmap_config = i2c_get_match_data(i2c); adp5585->regmap = devm_regmap_init_i2c(i2c, regmap_config); if (IS_ERR(adp5585->regmap)) return dev_err_probe(&i2c->dev, PTR_ERR(adp5585->regmap), "Failed to initialize register map\n"); ret = regmap_read(adp5585->regmap, ADP5585_ID, &id); if (ret) return dev_err_probe(&i2c->dev, ret, "Failed to read device ID\n"); if ((id & ADP5585_MAN_ID_MASK) != ADP5585_MAN_ID_VALUE) return dev_err_probe(&i2c->dev, -ENODEV, "Invalid device ID 0x%02x\n", id); ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, adp5585_devs, ARRAY_SIZE(adp5585_devs), NULL, 0, NULL); if (ret) return dev_err_probe(&i2c->dev, ret, "Failed to add child devices\n"); return 0; } static int adp5585_suspend(struct device *dev) { struct adp5585_dev *adp5585 = dev_get_drvdata(dev); regcache_cache_only(adp5585->regmap, true); return 0; } static int adp5585_resume(struct device *dev) { struct adp5585_dev *adp5585 = dev_get_drvdata(dev); regcache_cache_only(adp5585->regmap, false); regcache_mark_dirty(adp5585->regmap); return regcache_sync(adp5585->regmap); } static DEFINE_SIMPLE_DEV_PM_OPS(adp5585_pm, adp5585_suspend, adp5585_resume); static const struct of_device_id adp5585_of_match[] = { { .compatible = "adi,adp5585-00", .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], }, { .compatible = "adi,adp5585-01", .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], }, { .compatible = "adi,adp5585-02", .data = &adp5585_regmap_configs[ADP5585_REGMAP_02], }, { .compatible = "adi,adp5585-03", .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], }, { .compatible = "adi,adp5585-04", .data = &adp5585_regmap_configs[ADP5585_REGMAP_04], }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, adp5585_of_match); static struct i2c_driver adp5585_i2c_driver = { .driver = { .name = "adp5585", .of_match_table = adp5585_of_match, .pm = pm_sleep_ptr(&adp5585_pm), }, .probe = adp5585_i2c_probe, }; module_i2c_driver(adp5585_i2c_driver); MODULE_DESCRIPTION("ADP5585 core driver"); MODULE_AUTHOR("Haibo Chen "); MODULE_LICENSE("GPL");