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b65a0a8edb
Restore synchronous probing for Arizona regulators as the main MFD
relies on the ordering of the devices probing.
As these regulators are built into the CODEC and typically have no DT
representation the regulator framework is unaware of their existence
until the driver probes. These means the probing of the driver needs to
be synchronous to ensure the regulators are not substitued for the dummy
later when the users request them.
Fixes: 259b93b21a ("regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in 4.14")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230323132047.833737-2-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
405 lines
10 KiB
C
405 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// arizona-micsupp.c -- Microphone supply for Arizona devices
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//
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// Copyright 2012 Wolfson Microelectronics PLC.
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//
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// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/bitops.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <sound/soc.h>
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#include <linux/mfd/arizona/core.h>
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#include <linux/mfd/arizona/pdata.h>
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#include <linux/mfd/arizona/registers.h>
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#include <linux/mfd/madera/core.h>
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#include <linux/mfd/madera/pdata.h>
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#include <linux/mfd/madera/registers.h>
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#include <linux/regulator/arizona-micsupp.h>
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struct arizona_micsupp {
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struct regulator_dev *regulator;
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struct regmap *regmap;
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struct snd_soc_dapm_context **dapm;
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const struct regulator_desc *desc;
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struct device *dev;
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struct regulator_consumer_supply supply;
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struct regulator_init_data init_data;
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struct work_struct check_cp_work;
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};
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static void arizona_micsupp_check_cp(struct work_struct *work)
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{
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struct arizona_micsupp *micsupp =
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container_of(work, struct arizona_micsupp, check_cp_work);
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struct snd_soc_dapm_context *dapm = *micsupp->dapm;
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struct snd_soc_component *component;
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const struct regulator_desc *desc = micsupp->desc;
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unsigned int val;
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int ret;
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ret = regmap_read(micsupp->regmap, desc->enable_reg, &val);
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if (ret != 0) {
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dev_err(micsupp->dev,
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"Failed to read CP state: %d\n", ret);
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return;
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}
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if (dapm) {
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component = snd_soc_dapm_to_component(dapm);
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if ((val & (desc->enable_mask | desc->bypass_mask)) ==
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desc->enable_mask)
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snd_soc_component_force_enable_pin(component,
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"MICSUPP");
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else
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snd_soc_component_disable_pin(component, "MICSUPP");
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snd_soc_dapm_sync(dapm);
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}
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}
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static int arizona_micsupp_enable(struct regulator_dev *rdev)
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{
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struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
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int ret;
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ret = regulator_enable_regmap(rdev);
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if (ret == 0)
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schedule_work(&micsupp->check_cp_work);
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return ret;
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}
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static int arizona_micsupp_disable(struct regulator_dev *rdev)
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{
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struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
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int ret;
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ret = regulator_disable_regmap(rdev);
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if (ret == 0)
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schedule_work(&micsupp->check_cp_work);
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return ret;
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}
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static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
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{
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struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
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int ret;
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ret = regulator_set_bypass_regmap(rdev, ena);
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if (ret == 0)
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schedule_work(&micsupp->check_cp_work);
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return ret;
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}
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static const struct regulator_ops arizona_micsupp_ops = {
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.enable = arizona_micsupp_enable,
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.disable = arizona_micsupp_disable,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_bypass = regulator_get_bypass_regmap,
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.set_bypass = arizona_micsupp_set_bypass,
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};
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static const struct linear_range arizona_micsupp_ranges[] = {
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REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000),
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REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
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};
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static const struct regulator_desc arizona_micsupp = {
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.name = "MICVDD",
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.supply_name = "CPVDD",
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 32,
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.ops = &arizona_micsupp_ops,
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.vsel_reg = ARIZONA_LDO2_CONTROL_1,
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.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
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.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.enable_mask = ARIZONA_CPMIC_ENA,
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.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.bypass_mask = ARIZONA_CPMIC_BYPASS,
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.linear_ranges = arizona_micsupp_ranges,
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.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
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.enable_time = 3000,
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.owner = THIS_MODULE,
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};
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static const struct linear_range arizona_micsupp_ext_ranges[] = {
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REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000),
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REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
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};
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static const struct regulator_desc arizona_micsupp_ext = {
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.name = "MICVDD",
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.supply_name = "CPVDD",
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 40,
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.ops = &arizona_micsupp_ops,
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.vsel_reg = ARIZONA_LDO2_CONTROL_1,
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.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
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.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.enable_mask = ARIZONA_CPMIC_ENA,
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.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.bypass_mask = ARIZONA_CPMIC_BYPASS,
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.linear_ranges = arizona_micsupp_ext_ranges,
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.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
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.enable_time = 3000,
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.owner = THIS_MODULE,
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};
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static const struct regulator_init_data arizona_micsupp_default = {
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.constraints = {
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.valid_ops_mask = REGULATOR_CHANGE_STATUS |
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_BYPASS,
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.min_uV = 1700000,
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.max_uV = 3300000,
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},
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.num_consumer_supplies = 1,
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};
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static const struct regulator_init_data arizona_micsupp_ext_default = {
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.constraints = {
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.valid_ops_mask = REGULATOR_CHANGE_STATUS |
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_BYPASS,
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.min_uV = 900000,
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.max_uV = 3300000,
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},
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.num_consumer_supplies = 1,
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};
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static const struct regulator_desc madera_micsupp = {
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.name = "MICVDD",
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.supply_name = "CPVDD1",
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 40,
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.ops = &arizona_micsupp_ops,
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.vsel_reg = MADERA_LDO2_CONTROL_1,
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.vsel_mask = MADERA_LDO2_VSEL_MASK,
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.enable_reg = MADERA_MIC_CHARGE_PUMP_1,
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.enable_mask = MADERA_CPMIC_ENA,
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.bypass_reg = MADERA_MIC_CHARGE_PUMP_1,
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.bypass_mask = MADERA_CPMIC_BYPASS,
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.linear_ranges = arizona_micsupp_ext_ranges,
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.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
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.enable_time = 3000,
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.owner = THIS_MODULE,
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};
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static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,
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struct regulator_config *config,
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const struct regulator_desc *desc)
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{
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struct arizona_micsupp *micsupp = config->driver_data;
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struct device_node *np;
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struct regulator_init_data *init_data;
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np = of_get_child_by_name(config->dev->of_node, "micvdd");
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if (np) {
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config->of_node = np;
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init_data = of_get_regulator_init_data(config->dev, np, desc);
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if (init_data) {
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init_data->consumer_supplies = &micsupp->supply;
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init_data->num_consumer_supplies = 1;
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pdata->init_data = init_data;
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}
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}
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return 0;
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}
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static int arizona_micsupp_common_init(struct platform_device *pdev,
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struct arizona_micsupp *micsupp,
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const struct regulator_desc *desc,
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struct arizona_micsupp_pdata *pdata)
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{
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struct regulator_config config = { };
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int ret;
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INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
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micsupp->init_data.consumer_supplies = &micsupp->supply;
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micsupp->supply.dev_name = dev_name(micsupp->dev);
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micsupp->desc = desc;
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config.dev = micsupp->dev;
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config.driver_data = micsupp;
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config.regmap = micsupp->regmap;
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if (IS_ENABLED(CONFIG_OF)) {
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if (!dev_get_platdata(micsupp->dev)) {
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ret = arizona_micsupp_of_get_pdata(pdata, &config,
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desc);
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if (ret < 0)
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return ret;
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}
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}
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if (pdata->init_data)
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config.init_data = pdata->init_data;
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else
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config.init_data = &micsupp->init_data;
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/* Default to regulated mode */
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regmap_update_bits(micsupp->regmap, desc->enable_reg, desc->bypass_mask, 0);
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micsupp->regulator = devm_regulator_register(&pdev->dev,
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desc,
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&config);
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of_node_put(config.of_node);
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if (IS_ERR(micsupp->regulator)) {
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ret = PTR_ERR(micsupp->regulator);
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dev_err(micsupp->dev, "Failed to register mic supply: %d\n",
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ret);
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return ret;
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}
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platform_set_drvdata(pdev, micsupp);
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return 0;
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}
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static int arizona_micsupp_probe(struct platform_device *pdev)
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{
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struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
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const struct regulator_desc *desc;
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struct arizona_micsupp *micsupp;
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micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
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if (!micsupp)
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return -ENOMEM;
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micsupp->regmap = arizona->regmap;
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micsupp->dapm = &arizona->dapm;
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micsupp->dev = arizona->dev;
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micsupp->supply.supply = "MICVDD";
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/*
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* Since the chip usually supplies itself we provide some
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* default init_data for it. This will be overridden with
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* platform data if provided.
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*/
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switch (arizona->type) {
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case WM5110:
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case WM8280:
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desc = &arizona_micsupp_ext;
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micsupp->init_data = arizona_micsupp_ext_default;
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break;
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default:
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desc = &arizona_micsupp;
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micsupp->init_data = arizona_micsupp_default;
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break;
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}
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return arizona_micsupp_common_init(pdev, micsupp, desc,
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&arizona->pdata.micvdd);
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}
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static int madera_micsupp_probe(struct platform_device *pdev)
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{
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struct madera *madera = dev_get_drvdata(pdev->dev.parent);
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struct arizona_micsupp *micsupp;
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micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
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if (!micsupp)
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return -ENOMEM;
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micsupp->regmap = madera->regmap;
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micsupp->dapm = &madera->dapm;
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micsupp->dev = madera->dev;
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micsupp->init_data = arizona_micsupp_ext_default;
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micsupp->supply.supply = "MICVDD";
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return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,
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&madera->pdata.micvdd);
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}
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static struct platform_driver arizona_micsupp_driver = {
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.probe = arizona_micsupp_probe,
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.driver = {
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.name = "arizona-micsupp",
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.probe_type = PROBE_FORCE_SYNCHRONOUS,
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},
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};
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static struct platform_driver madera_micsupp_driver = {
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.probe = madera_micsupp_probe,
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.driver = {
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.name = "madera-micsupp",
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.probe_type = PROBE_FORCE_SYNCHRONOUS,
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},
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};
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static struct platform_driver * const arizona_micsupp_drivers[] = {
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&arizona_micsupp_driver,
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&madera_micsupp_driver,
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};
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static int __init arizona_micsupp_init(void)
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{
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return platform_register_drivers(arizona_micsupp_drivers,
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ARRAY_SIZE(arizona_micsupp_drivers));
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}
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module_init(arizona_micsupp_init);
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static void __exit arizona_micsupp_exit(void)
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{
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platform_unregister_drivers(arizona_micsupp_drivers,
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ARRAY_SIZE(arizona_micsupp_drivers));
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}
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module_exit(arizona_micsupp_exit);
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/* Module information */
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_DESCRIPTION("Arizona microphone supply driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:arizona-micsupp");
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MODULE_ALIAS("platform:madera-micsupp");
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