--- /dev/null
+/*
+ * 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/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.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,
+};
+
+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, \
+ .of_match = of_match_ptr("REG_"#_id), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .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 int act8945a_pmic_probe(struct platform_device *pdev)
+{
+ struct regulator_config config = { };
+ const struct regulator_desc *regulators;
+ struct regulator_dev *rdev;
+ int i, num_regulators;
+ bool voltage_select;
+
+ voltage_select = of_property_read_bool(pdev->dev.parent->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);
+ }
+
+ config.dev = &pdev->dev;
+ config.dev->of_node = pdev->dev.parent->of_node;
+ for (i = 0; i < num_regulators; i++) {
+ rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev,
+ "failed to register %s regulator\n",
+ regulators[i].name);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ return 0;
+}
+
+static struct platform_driver act8945a_pmic_driver = {
+ .driver = {
+ .name = "act8945a-regulator",
+ },
+ .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");
projects / deliverable / linux.git / commitdiff
