@@ -0,0 +1,267 @@
+/*
+ * Voltage regulation driver for active-semi ACT8945A PMIC
+ *
+ * Copyright (C) 2015 Atmel Corporation
+ *
+ * Author: Wenyou Yang <wenyou.yang@atmel.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/mfd/act8945a.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+
+/**
+ * ACT8945A Global Register Map.
+ */
+#define ACT8945A_SYS_MODE 0x00
+#define ACT8945A_SYS_CTRL 0x01
+#define ACT8945A_DCDC1_VSET1 0x20
+#define ACT8945A_DCDC1_VSET2 0x21
+#define ACT8945A_DCDC1_CTRL 0x22
+#define ACT8945A_DCDC2_VSET1 0x30
+#define ACT8945A_DCDC2_VSET2 0x31
+#define ACT8945A_DCDC2_CTRL 0x32
+#define ACT8945A_DCDC3_VSET1 0x40
+#define ACT8945A_DCDC3_VSET2 0x41
+#define ACT8945A_DCDC3_CTRL 0x42
+#define ACT8945A_LDO1_VSET 0x50
+#define ACT8945A_LDO1_CTRL 0x51
+#define ACT8945A_LDO2_VSET 0x54
+#define ACT8945A_LDO2_CTRL 0x55
+#define ACT8945A_LDO3_VSET 0x60
+#define ACT8945A_LDO3_CTRL 0x61
+#define ACT8945A_LDO4_VSET 0x64
+#define ACT8945A_LDO4_CTRL 0x65
+
+/**
+ * Field Definitions.
+ */
+#define ACT8945A_ENA 0x80 /* ON - [7] */
+#define ACT8945A_VSEL_MASK 0x3F /* VSET - [5:0] */
+
+/**
+ * ACT8945A voltage number
+ */
+#define ACT8945A_VOLTAGE_NUM 64
+
+enum {
+ ACT8945A_ID_DCDC1,
+ ACT8945A_ID_DCDC2,
+ ACT8945A_ID_DCDC3,
+ ACT8945A_ID_LDO1,
+ ACT8945A_ID_LDO2,
+ ACT8945A_ID_LDO3,
+ ACT8945A_ID_LDO4,
+ ACT8945A_REG_NUM,
+};
+
+struct act8945a_regulator_init_data {
+ int id;
+ const char *name;
+ struct regulator_init_data *init_data;
+};
+
+struct act8945a_pmic_data {
+ int num_regulators;
+ struct act8945a_regulator_init_data *regulators;
+};
+
+static const struct regulator_linear_range act8945a_voltage_ranges[] = {
+ REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
+ REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
+ REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
+};
+
+static struct regulator_ops act8945a_ops = {
+ .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,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+};
+
+#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \
+ [_family##_ID_##_id] = { \
+ .name = _name, \
+ .supply_name = _supply, \
+ .id = _family##_ID_##_id, \
+ .type = REGULATOR_VOLTAGE, \
+ .ops = &act8945a_ops, \
+ .n_voltages = ACT8945A_VOLTAGE_NUM, \
+ .linear_ranges = act8945a_voltage_ranges, \
+ .n_linear_ranges = ARRAY_SIZE(act8945a_voltage_ranges), \
+ .vsel_reg = _family##_##_id##_##_vsel_reg, \
+ .vsel_mask = ACT8945A_VSEL_MASK, \
+ .enable_reg = _family##_##_id##_CTRL, \
+ .enable_mask = ACT8945A_ENA, \
+ .owner = THIS_MODULE, \
+ }
+
+static const struct regulator_desc act8945a_regulators[] = {
+ ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"),
+ ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"),
+ ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"),
+ ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
+ ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
+ ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
+ ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
+};
+
+static const struct regulator_desc act8945a_alt_regulators[] = {
+ ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"),
+ ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"),
+ ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"),
+ ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
+ ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
+ ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
+ ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
+};
+
+static struct of_regulator_match act8945a_matches[] = {
+ [ACT8945A_ID_DCDC1] = { .name = "DCDC_REG1"},
+ [ACT8945A_ID_DCDC2] = { .name = "DCDC_REG2"},
+ [ACT8945A_ID_DCDC3] = { .name = "DCDC_REG3"},
+ [ACT8945A_ID_LDO1] = { .name = "LDO_REG1"},
+ [ACT8945A_ID_LDO2] = { .name = "LDO_REG2"},
+ [ACT8945A_ID_LDO3] = { .name = "LDO_REG3"},
+ [ACT8945A_ID_LDO4] = { .name = "LDO_REG4"},
+};
+
+static int act8945a_parse_dt_reg_data(struct platform_device *pdev,
+ struct act8945a_pmic_data *pdata,
+ struct of_regulator_match **act8945a_reg_matches)
+{
+ struct device_node *np;
+ struct of_regulator_match *matches;
+ struct act8945a_regulator_init_data *regulator;
+ unsigned int i, num_matches;
+ int ret;
+
+ np = of_get_child_by_name(pdev->dev.of_node, "regulators");
+ if (!np) {
+ dev_err(&pdev->dev, "regulator node not found\n");
+ return -EINVAL;
+ }
+
+ matches = act8945a_matches;
+ num_matches = ARRAY_SIZE(act8945a_matches);
+
+ ret = of_regulator_match(&pdev->dev, np, matches, num_matches);
+ of_node_put(np);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
+ ret);
+ return -EINVAL;
+ }
+
+ *act8945a_reg_matches = matches;
+
+ pdata->regulators = devm_kzalloc(&pdev->dev,
+ sizeof(struct act8945a_regulator_init_data) * num_matches,
+ GFP_KERNEL);
+ if (!pdata->regulators)
+ return -ENOMEM;
+
+ pdata->num_regulators = num_matches;
+ regulator = pdata->regulators;
+
+ for (i = 0; i < num_matches; i++) {
+ regulator->id = i;
+ regulator->name = matches[i].name;
+ regulator->init_data = matches[i].init_data;
+ regulator++;
+ }
+
+ return 0;
+}
+
+static struct regulator_init_data *act8945a_get_init_data(int id,
+ struct act8945a_pmic_data *pdata)
+{
+ int i;
+
+ if (!pdata)
+ return NULL;
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ if (pdata->regulators[i].id == id)
+ return pdata->regulators[i].init_data;
+ }
+
+ return NULL;
+}
+
+static int act8945a_pmic_probe(struct platform_device *pdev)
+{
+ struct act8945a_dev *act8945a_dev = dev_get_drvdata(pdev->dev.parent);
+ struct of_regulator_match *act8945a_reg_matches = NULL;
+ struct regulator_config config = { };
+ const struct regulator_desc *regulators, *desc;
+ struct regulator_dev *rdev;
+ struct act8945a_pmic_data pmic_data;
+ int i, num_regulators;
+ bool voltage_select;
+ int ret;
+
+ ret = act8945a_parse_dt_reg_data(pdev, &pmic_data,
+ &act8945a_reg_matches);
+ if (ret < 0)
+ return ret;
+
+ voltage_select = of_property_read_bool(pdev->dev.of_node,
+ "active-semi,vsel-high");
+
+ if (voltage_select) {
+ regulators = act8945a_alt_regulators;
+ num_regulators = ARRAY_SIZE(act8945a_alt_regulators);
+ } else {
+ regulators = act8945a_regulators;
+ num_regulators = ARRAY_SIZE(act8945a_regulators);
+ }
+
+ for (i = 0; i < num_regulators; i++) {
+ desc = ®ulators[i];
+
+ config.dev = &pdev->dev;
+ config.init_data = act8945a_get_init_data(desc->id, &pmic_data);
+ config.regmap = act8945a_dev->regmap;
+ if (act8945a_reg_matches)
+ config.of_node = act8945a_reg_matches[i].of_node;
+
+ rdev = devm_regulator_register(&pdev->dev, desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev,
+ "failed to register %s regulator\n",
+ desc->name);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ platform_set_drvdata(pdev, act8945a_dev);
+
+ return 0;
+}
+
+static struct platform_driver act8945a_pmic_driver = {
+ .driver = {
+ .name = "act8945a-pmic",
+ },
+ .probe = act8945a_pmic_probe,
+};
+module_platform_driver(act8945a_pmic_driver);
+
+MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver");
+MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
+MODULE_LICENSE("GPL");