--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+//
+// tps65219-regulator.c
+//
+// Regulator driver for TPS65219 PMIC
+//
+// Copyright (C) 2022 BayLibre Incorporated - https://www.baylibre.com/
+//
+// This implementation derived from tps65218 authored by
+// "J Keerthy <j-keerthy@ti.com>"
+//
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/tps65219.h>
+
+struct tps65219_regulator_irq_type {
+ const char *irq_name;
+ const char *regulator_name;
+ const char *event_name;
+ unsigned long event;
+};
+
+struct tps65219_regulator_irq_type tps65219_regulator_irq_types[] = {
+ { "LDO3_SCG", "LDO3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "LDO3_OC", "LDO3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "LDO3_UV", "LDO3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "LDO4_SCG", "LDO4", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "LDO4_OC", "LDO4", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "LDO4_UV", "LDO4", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "LDO1_SCG", "LDO1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "LDO1_OC", "LDO1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "LDO1_UV", "LDO1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "LDO2_SCG", "LDO2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "LDO2_OC", "LDO2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "LDO2_UV", "LDO2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "BUCK3_SCG", "BUCK3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "BUCK3_OC", "BUCK3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "BUCK3_NEG_OC", "BUCK3", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "BUCK3_UV", "BUCK3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "BUCK1_SCG", "BUCK1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "BUCK1_OC", "BUCK1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "BUCK1_NEG_OC", "BUCK1", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "BUCK1_UV", "BUCK1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "BUCK2_SCG", "BUCK2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
+ { "BUCK2_OC", "BUCK2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "BUCK2_NEG_OC", "BUCK2", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
+ { "BUCK2_UV", "BUCK2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
+ { "BUCK1_RV", "BUCK1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "BUCK2_RV", "BUCK2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "BUCK3_RV", "BUCK3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO1_RV", "LDO1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO2_RV", "LDO2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO3_RV", "LDO3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO4_RV", "LDO4", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "BUCK1_RV_SD", "BUCK1", "residual voltage on shutdown",
+ REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "BUCK2_RV_SD", "BUCK2", "residual voltage on shutdown",
+ REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "BUCK3_RV_SD", "BUCK3", "residual voltage on shutdown",
+ REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO1_RV_SD", "LDO1", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO2_RV_SD", "LDO2", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO3_RV_SD", "LDO3", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "LDO4_RV_SD", "LDO4", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { "SENSOR_3_WARM", "SENSOR3", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN},
+ { "SENSOR_2_WARM", "SENSOR2", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
+ { "SENSOR_1_WARM", "SENSOR1", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
+ { "SENSOR_0_WARM", "SENSOR0", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
+ { "SENSOR_3_HOT", "SENSOR3", "hot temperature", REGULATOR_EVENT_OVER_TEMP},
+ { "SENSOR_2_HOT", "SENSOR2", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
+ { "SENSOR_1_HOT", "SENSOR1", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
+ { "SENSOR_0_HOT", "SENSOR0", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
+ { "TIMEOUT", "", "", REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE },
+};
+
+struct tps65219_regulator_irq_data {
+ struct device *dev;
+ struct tps65219_regulator_irq_type *type;
+ struct regulator_dev *rdev;
+};
+
+#define TPS65219_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
+ _em, _cr, _cm, _lr, _nlr, _delay, _fuv, \
+ _ct, _ncl, _bpm) \
+ { \
+ .name = _name, \
+ .of_match = _of, \
+ .regulators_node = of_match_ptr("regulators"), \
+ .supply_name = _of, \
+ .id = _id, \
+ .ops = &(_ops), \
+ .n_voltages = _n, \
+ .type = _type, \
+ .owner = THIS_MODULE, \
+ .vsel_reg = _vr, \
+ .vsel_mask = _vm, \
+ .csel_reg = _cr, \
+ .csel_mask = _cm, \
+ .curr_table = _ct, \
+ .n_current_limits = _ncl, \
+ .enable_reg = _er, \
+ .enable_mask = _em, \
+ .volt_table = NULL, \
+ .linear_ranges = _lr, \
+ .n_linear_ranges = _nlr, \
+ .ramp_delay = _delay, \
+ .fixed_uV = _fuv, \
+ .bypass_reg = _vr, \
+ .bypass_mask = _bpm, \
+ .bypass_val_on = 1, \
+ } \
+
+static const struct linear_range bucks_ranges[] = {
+ REGULATOR_LINEAR_RANGE(600000, 0x0, 0x1f, 25000),
+ REGULATOR_LINEAR_RANGE(1400000, 0x20, 0x33, 100000),
+ REGULATOR_LINEAR_RANGE(3400000, 0x34, 0x3f, 0),
+};
+
+static const struct linear_range ldos_1_2_ranges[] = {
+ REGULATOR_LINEAR_RANGE(600000, 0x0, 0x37, 50000),
+ REGULATOR_LINEAR_RANGE(3400000, 0x38, 0x3f, 0),
+};
+
+static const struct linear_range ldos_3_4_ranges[] = {
+ REGULATOR_LINEAR_RANGE(1200000, 0x0, 0xC, 0),
+ REGULATOR_LINEAR_RANGE(1250000, 0xD, 0x35, 50000),
+ REGULATOR_LINEAR_RANGE(3300000, 0x36, 0x3F, 0),
+};
+
+static int tps65219_set_mode(struct regulator_dev *dev, unsigned int mode)
+{
+ struct tps65219 *tps = rdev_get_drvdata(dev);
+
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ return regmap_set_bits(tps->regmap, TPS65219_REG_STBY_1_CONFIG,
+ dev->desc->enable_mask);
+
+ case REGULATOR_MODE_STANDBY:
+ return regmap_clear_bits(tps->regmap,
+ TPS65219_REG_STBY_1_CONFIG,
+ dev->desc->enable_mask);
+ default:
+ return -EINVAL;
+ }
+}
+
+static unsigned int tps65219_get_mode(struct regulator_dev *dev)
+{
+ struct tps65219 *tps = rdev_get_drvdata(dev);
+ unsigned int rid = rdev_get_id(dev);
+ int ret, value = 0;
+
+ ret = regmap_read(tps->regmap, TPS65219_REG_STBY_1_CONFIG, &value);
+ if (ret) {
+ dev_dbg(tps->dev, "%s failed for regulator %s: %d ",
+ __func__, dev->desc->name, ret);
+ return ret;
+ }
+ value = (value & BIT(rid)) >> rid;
+ if (value)
+ return REGULATOR_MODE_STANDBY;
+ else
+ return REGULATOR_MODE_NORMAL;
+}
+
+/*
+ * generic regulator_set_bypass_regmap does not fully match requirements
+ * TPS65219 Requires explicitly that regulator is disabled before switch
+ */
+static int tps65219_set_bypass(struct regulator_dev *dev, bool enable)
+{
+ struct tps65219 *tps = rdev_get_drvdata(dev);
+ unsigned int rid = rdev_get_id(dev);
+ int ret = 0;
+
+ if (dev->desc->ops->enable) {
+ dev_err(tps->dev,
+ "%s LDO%d enabled, must be shut down to set bypass ",
+ __func__, rid);
+ return -EBUSY;
+ }
+ ret = regulator_set_bypass_regmap(dev, enable);
+ return ret;
+}
+
+/* Operations permitted on BUCK1/2/3 */
+static const struct regulator_ops tps65219_bucks_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_mode = tps65219_set_mode,
+ .get_mode = tps65219_get_mode,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+
+};
+
+/* Operations permitted on LDO1/2 */
+static const struct regulator_ops tps65219_ldos_1_2_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_mode = tps65219_set_mode,
+ .get_mode = tps65219_get_mode,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_bypass = tps65219_set_bypass,
+ .get_bypass = regulator_get_bypass_regmap,
+};
+
+/* Operations permitted on LDO3/4 */
+static const struct regulator_ops tps65219_ldos_3_4_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_mode = tps65219_set_mode,
+ .get_mode = tps65219_get_mode,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+};
+
+static const struct regulator_desc regulators[] = {
+ TPS65219_REGULATOR("BUCK1", "buck1", TPS65219_BUCK_1,
+ REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
+ TPS65219_REG_BUCK1_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_BUCK1_EN_MASK, 0, 0, bucks_ranges,
+ 3, 4000, 0, NULL, 0, 0),
+ TPS65219_REGULATOR("BUCK2", "buck2", TPS65219_BUCK_2,
+ REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
+ TPS65219_REG_BUCK2_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_BUCK2_EN_MASK, 0, 0, bucks_ranges,
+ 3, 4000, 0, NULL, 0, 0),
+ TPS65219_REGULATOR("BUCK3", "buck3", TPS65219_BUCK_3,
+ REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
+ TPS65219_REG_BUCK3_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_BUCK3_EN_MASK, 0, 0, bucks_ranges,
+ 3, 0, 0, NULL, 0, 0),
+ TPS65219_REGULATOR("LDO1", "ldo1", TPS65219_LDO_1,
+ REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64,
+ TPS65219_REG_LDO1_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_LDO1_EN_MASK, 0, 0, ldos_1_2_ranges,
+ 2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK),
+ TPS65219_REGULATOR("LDO2", "ldo2", TPS65219_LDO_2,
+ REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64,
+ TPS65219_REG_LDO2_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_LDO2_EN_MASK, 0, 0, ldos_1_2_ranges,
+ 2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK),
+ TPS65219_REGULATOR("LDO3", "ldo3", TPS65219_LDO_3,
+ REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64,
+ TPS65219_REG_LDO3_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_LDO3_EN_MASK, 0, 0, ldos_3_4_ranges,
+ 3, 0, 0, NULL, 0, 0),
+ TPS65219_REGULATOR("LDO4", "ldo4", TPS65219_LDO_4,
+ REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64,
+ TPS65219_REG_LDO4_VOUT,
+ TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
+ TPS65219_REG_ENABLE_CTRL,
+ TPS65219_ENABLE_LDO4_EN_MASK, 0, 0, ldos_3_4_ranges,
+ 3, 0, 0, NULL, 0, 0),
+};
+
+static irqreturn_t tps65219_regulator_irq_handler(int irq, void *data)
+{
+ struct tps65219_regulator_irq_data *irq_data = data;
+
+ if (irq_data->type->event_name[0] == '\0') {
+ /* This is the timeout interrupt no specific regulator */
+ dev_err(irq_data->dev,
+ "System was put in shutdown due to timeout during an active or standby transition.\n");
+ return IRQ_HANDLED;
+ }
+
+ regulator_notifier_call_chain(irq_data->rdev,
+ irq_data->type->event, NULL);
+
+ dev_err(irq_data->dev, "Error IRQ trap %s for %s\n",
+ irq_data->type->event_name, irq_data->type->regulator_name);
+ return IRQ_HANDLED;
+}
+
+static int tps65219_get_rdev_by_name(const char *regulator_name,
+ struct regulator_dev *rdevtbl[7],
+ struct regulator_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+ if (strcmp(regulator_name, regulators[i].name) == 0) {
+ dev = rdevtbl[i];
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int tps65219_regulator_probe(struct platform_device *pdev)
+{
+ struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent);
+ struct regulator_dev *rdev;
+ struct regulator_config config = { };
+ int i;
+ int error;
+ int irq;
+ struct tps65219_regulator_irq_data *irq_data;
+ struct tps65219_regulator_irq_type *irq_type;
+ struct regulator_dev *rdevtbl[7];
+
+ config.dev = tps->dev;
+ config.driver_data = tps;
+ config.regmap = tps->regmap;
+
+ for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+ dev_dbg(tps->dev, "%s regul i= %d START", __func__, i);
+ rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
+ &config);
+ if (IS_ERR(rdev)) {
+ dev_err(tps->dev, "failed to register %s regulator\n",
+ pdev->name);
+ return PTR_ERR(rdev);
+ }
+ rdevtbl[i] = rdev;
+ dev_dbg(tps->dev, "%s regul i= %d COMPLETED", __func__, i);
+ }
+
+ irq_data = devm_kmalloc(tps->dev,
+ ARRAY_SIZE(tps65219_regulator_irq_types) *
+ sizeof(struct tps65219_regulator_irq_data),
+ GFP_KERNEL);
+ if (!irq_data)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(tps65219_regulator_irq_types); ++i) {
+ irq_type = &tps65219_regulator_irq_types[i];
+
+ irq = platform_get_irq_byname(pdev, irq_type->irq_name);
+ if (irq < 0) {
+ dev_err(tps->dev, "Failed to get IRQ %s: %d\n",
+ irq_type->irq_name, irq);
+ return -EINVAL;
+ }
+ irq_data[i].dev = tps->dev;
+ irq_data[i].type = irq_type;
+
+ tps65219_get_rdev_by_name(irq_type->regulator_name, rdevtbl, rdev);
+ if (rdev < 0) {
+ dev_err(tps->dev, "Failed to get rdev for %s\n",
+ irq_type->regulator_name);
+ return -EINVAL;
+ }
+ irq_data[i].rdev = rdev;
+
+ error = devm_request_threaded_irq(tps->dev, irq, NULL,
+ tps65219_regulator_irq_handler,
+ IRQF_ONESHOT,
+ irq_type->irq_name,
+ &irq_data[i]);
+ if (error) {
+ dev_err(tps->dev, "failed to request %s IRQ %d: %d\n",
+ irq_type->irq_name, irq, error);
+ return error;
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id tps65219_regulator_id_table[] = {
+ { "tps65219-regulator", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, tps65219_regulator_id_table);
+
+static struct platform_driver tps65219_regulator_driver = {
+ .driver = {
+ .name = "tps65219-pmic",
+ },
+ .probe = tps65219_regulator_probe,
+ .id_table = tps65219_regulator_id_table,
+};
+
+module_platform_driver(tps65219_regulator_driver);
+
+MODULE_AUTHOR("Jerome Neanne <j-neanne@baylibre.com>");
+MODULE_DESCRIPTION("TPS65219 voltage regulator driver");
+MODULE_ALIAS("platform:tps65219-pmic");
+MODULE_LICENSE("GPL");
projects / platform / kernel / linux-rpi.git / commitdiff