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path: root/drivers/regulator/arizona-micsupp.c
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Diffstat (limited to 'drivers/regulator/arizona-micsupp.c')
-rw-r--r--drivers/regulator/arizona-micsupp.c316
1 files changed, 316 insertions, 0 deletions
diff --git a/drivers/regulator/arizona-micsupp.c b/drivers/regulator/arizona-micsupp.c
new file mode 100644
index 000000000..fcb98dbda
--- /dev/null
+++ b/drivers/regulator/arizona-micsupp.c
@@ -0,0 +1,316 @@
+/*
+ * arizona-micsupp.c -- Microphone supply for Arizona devices
+ *
+ * Copyright 2012 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * 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 <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <sound/soc.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/pdata.h>
+#include <linux/mfd/arizona/registers.h>
+
+struct arizona_micsupp {
+ struct regulator_dev *regulator;
+ struct arizona *arizona;
+
+ 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->arizona->dapm;
+ struct arizona *arizona = micsupp->arizona;
+ struct regmap *regmap = arizona->regmap;
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, &reg);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
+ return;
+ }
+
+ if (dapm) {
+ if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
+ ARIZONA_CPMIC_ENA)
+ snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
+ else
+ snd_soc_dapm_disable_pin(dapm, "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 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 *arizona,
+ struct regulator_config *config,
+ const struct regulator_desc *desc)
+{
+ struct arizona_pdata *pdata = &arizona->pdata;
+ struct arizona_micsupp *micsupp = config->driver_data;
+ struct device_node *np;
+ struct regulator_init_data *init_data;
+
+ np = of_get_child_by_name(arizona->dev->of_node, "micvdd");
+
+ if (np) {
+ config->of_node = np;
+
+ init_data = of_get_regulator_init_data(arizona->dev, np, desc);
+
+ if (init_data) {
+ init_data->consumer_supplies = &micsupp->supply;
+ init_data->num_consumer_supplies = 1;
+
+ pdata->micvdd = init_data;
+ }
+ }
+
+ 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 regulator_config config = { };
+ struct arizona_micsupp *micsupp;
+ int ret;
+
+ micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
+ if (!micsupp)
+ return -ENOMEM;
+
+ micsupp->arizona = arizona;
+ INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
+
+ /*
+ * 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;
+ }
+
+ micsupp->init_data.consumer_supplies = &micsupp->supply;
+ micsupp->supply.supply = "MICVDD";
+ micsupp->supply.dev_name = dev_name(arizona->dev);
+
+ config.dev = arizona->dev;
+ config.driver_data = micsupp;
+ config.regmap = arizona->regmap;
+
+ if (IS_ENABLED(CONFIG_OF)) {
+ if (!dev_get_platdata(arizona->dev)) {
+ ret = arizona_micsupp_of_get_pdata(arizona, &config,
+ desc);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ if (arizona->pdata.micvdd)
+ config.init_data = arizona->pdata.micvdd;
+ else
+ config.init_data = &micsupp->init_data;
+
+ /* Default to regulated mode until the API supports bypass */
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
+ 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(arizona->dev, "Failed to register mic supply: %d\n",
+ ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, micsupp);
+
+ return 0;
+}
+
+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 <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("Arizona microphone supply driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:arizona-micsupp");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-16 17:28:15 +0000