/* * arizona-micsupp.c -- Microphone supply for Arizona devices * * Copyright 2012 Wolfson Microelectronics PLC. * * Author: Mark Brown * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct arizona_micsupp { struct regulator_dev *regulator; struct regmap *regmap; struct snd_soc_dapm_context **dapm; unsigned int enable_reg; struct device *dev; struct regulator_consumer_supply supply; struct regulator_init_data init_data; struct work_struct check_cp_work; }; static void arizona_micsupp_check_cp(struct work_struct *work) { struct arizona_micsupp *micsupp = container_of(work, struct arizona_micsupp, check_cp_work); struct snd_soc_dapm_context *dapm = *micsupp->dapm; struct snd_soc_component *component; unsigned int val; int ret; ret = regmap_read(micsupp->regmap, micsupp->enable_reg, &val); if (ret != 0) { dev_err(micsupp->dev, "Failed to read CP state: %d\n", ret); return; } if (dapm) { component = snd_soc_dapm_to_component(dapm); if ((val & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) == ARIZONA_CPMIC_ENA) snd_soc_component_force_enable_pin(component, "MICSUPP"); else snd_soc_component_disable_pin(component, "MICSUPP"); snd_soc_dapm_sync(dapm); } } static int arizona_micsupp_enable(struct regulator_dev *rdev) { struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); int ret; ret = regulator_enable_regmap(rdev); if (ret == 0) schedule_work(&micsupp->check_cp_work); return ret; } static int arizona_micsupp_disable(struct regulator_dev *rdev) { struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); int ret; ret = regulator_disable_regmap(rdev); if (ret == 0) schedule_work(&micsupp->check_cp_work); return ret; } static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena) { struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); int ret; ret = regulator_set_bypass_regmap(rdev, ena); if (ret == 0) schedule_work(&micsupp->check_cp_work); return ret; } static const struct regulator_ops arizona_micsupp_ops = { .enable = arizona_micsupp_enable, .disable = arizona_micsupp_disable, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_bypass = regulator_get_bypass_regmap, .set_bypass = arizona_micsupp_set_bypass, }; static const struct regulator_linear_range arizona_micsupp_ranges[] = { REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), }; static const struct regulator_desc arizona_micsupp = { .name = "MICVDD", .supply_name = "CPVDD", .type = REGULATOR_VOLTAGE, .n_voltages = 32, .ops = &arizona_micsupp_ops, .vsel_reg = ARIZONA_LDO2_CONTROL_1, .vsel_mask = ARIZONA_LDO2_VSEL_MASK, .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, .enable_mask = ARIZONA_CPMIC_ENA, .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, .bypass_mask = ARIZONA_CPMIC_BYPASS, .linear_ranges = arizona_micsupp_ranges, .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), .enable_time = 3000, .owner = THIS_MODULE, }; static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = { REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000), REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000), }; static const struct regulator_desc arizona_micsupp_ext = { .name = "MICVDD", .supply_name = "CPVDD", .type = REGULATOR_VOLTAGE, .n_voltages = 40, .ops = &arizona_micsupp_ops, .vsel_reg = ARIZONA_LDO2_CONTROL_1, .vsel_mask = ARIZONA_LDO2_VSEL_MASK, .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, .enable_mask = ARIZONA_CPMIC_ENA, .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, .bypass_mask = ARIZONA_CPMIC_BYPASS, .linear_ranges = arizona_micsupp_ext_ranges, .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), .enable_time = 3000, .owner = THIS_MODULE, }; static const struct regulator_init_data arizona_micsupp_default = { .constraints = { .valid_ops_mask = REGULATOR_CHANGE_STATUS | REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_BYPASS, .min_uV = 1700000, .max_uV = 3300000, }, .num_consumer_supplies = 1, }; static const struct regulator_init_data arizona_micsupp_ext_default = { .constraints = { .valid_ops_mask = REGULATOR_CHANGE_STATUS | REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_BYPASS, .min_uV = 900000, .max_uV = 3300000, }, .num_consumer_supplies = 1, }; static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata, struct regulator_config *config, const struct regulator_desc *desc) { struct arizona_micsupp *micsupp = config->driver_data; struct device_node *np; struct regulator_init_data *init_data; np = of_get_child_by_name(config->dev->of_node, "micvdd"); if (np) { config->of_node = np; init_data = of_get_regulator_init_data(config->dev, np, desc); if (init_data) { init_data->consumer_supplies = &micsupp->supply; init_data->num_consumer_supplies = 1; pdata->init_data = init_data; } } return 0; } static int arizona_micsupp_common_init(struct platform_device *pdev, struct arizona_micsupp *micsupp, const struct regulator_desc *desc, struct arizona_micsupp_pdata *pdata) { struct regulator_config config = { }; int ret; INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); micsupp->init_data.consumer_supplies = &micsupp->supply; micsupp->supply.supply = "MICVDD"; micsupp->supply.dev_name = dev_name(micsupp->dev); micsupp->enable_reg = desc->enable_reg; config.dev = micsupp->dev; config.driver_data = micsupp; config.regmap = micsupp->regmap; if (IS_ENABLED(CONFIG_OF)) { if (!dev_get_platdata(micsupp->dev)) { ret = arizona_micsupp_of_get_pdata(pdata, &config, desc); if (ret < 0) return ret; } } if (pdata->init_data) config.init_data = pdata->init_data; else config.init_data = &micsupp->init_data; /* Default to regulated mode */ regmap_update_bits(micsupp->regmap, micsupp->enable_reg, ARIZONA_CPMIC_BYPASS, 0); micsupp->regulator = devm_regulator_register(&pdev->dev, desc, &config); of_node_put(config.of_node); if (IS_ERR(micsupp->regulator)) { ret = PTR_ERR(micsupp->regulator); dev_err(micsupp->dev, "Failed to register mic supply: %d\n", ret); return ret; } platform_set_drvdata(pdev, micsupp); return 0; } static int arizona_micsupp_probe(struct platform_device *pdev) { struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); const struct regulator_desc *desc; struct arizona_micsupp *micsupp; micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); if (!micsupp) return -ENOMEM; micsupp->regmap = arizona->regmap; micsupp->dapm = &arizona->dapm; micsupp->dev = arizona->dev; /* * Since the chip usually supplies itself we provide some * default init_data for it. This will be overridden with * platform data if provided. */ switch (arizona->type) { case WM5110: case WM8280: desc = &arizona_micsupp_ext; micsupp->init_data = arizona_micsupp_ext_default; break; default: desc = &arizona_micsupp; micsupp->init_data = arizona_micsupp_default; break; } return arizona_micsupp_common_init(pdev, micsupp, desc, &arizona->pdata.micvdd); } static struct platform_driver arizona_micsupp_driver = { .probe = arizona_micsupp_probe, .driver = { .name = "arizona-micsupp", }, }; module_platform_driver(arizona_micsupp_driver); /* Module information */ MODULE_AUTHOR("Mark Brown "); MODULE_DESCRIPTION("Arizona microphone supply driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:arizona-micsupp");