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Documentation/devicetree/bindings/regulator/act8945a-regulator.txt
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| Device-Tree bindings for regulators of Active-semi ACT8945A Multi-Function Device | ||
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| Required properties: | ||
| - compatible: "active-semi,act8945a", please refer to ../mfd/act8945a.txt. | ||
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| Optional properties: | ||
| - active-semi,vsel-high: Indicates if the VSEL pin is set to logic-high. | ||
| If this property is missing, assume the VSEL pin is set to logic-low. | ||
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| Optional input supply properties: | ||
| - vp1-supply: The input supply for REG_DCDC1 | ||
| - vp2-supply: The input supply for REG_DCDC2 | ||
| - vp3-supply: The input supply for REG_DCDC3 | ||
| - inl45-supply: The input supply for REG_LDO1 and REG_LDO2 | ||
| - inl67-supply: The input supply for REG_LDO3 and REG_LDO4 | ||
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| Any standard regulator properties can be used to configure the single regulator. | ||
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| The valid names for regulators are: | ||
| REG_DCDC1, REG_DCDC2, REG_DCDC3, REG_LDO1, REG_LDO2, REG_LDO3, REG_LDO4. | ||
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| Example: | ||
| pmic@5b { | ||
| compatible = "active-semi,act8945a"; | ||
| reg = <0x5b>; | ||
| status = "okay"; | ||
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| active-semi,vsel-high; | ||
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| regulators { | ||
| vdd_1v35_reg: REG_DCDC1 { | ||
| regulator-name = "VDD_1V35"; | ||
| regulator-min-microvolt = <1350000>; | ||
| regulator-max-microvolt = <1350000>; | ||
| regulator-always-on; | ||
| }; | ||
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| vdd_1v2_reg: REG_DCDC2 { | ||
| regulator-name = "VDD_1V2"; | ||
| regulator-min-microvolt = <1100000>; | ||
| regulator-max-microvolt = <1300000>; | ||
| regulator-always-on; | ||
| }; | ||
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| vdd_3v3_reg: REG_DCDC3 { | ||
| regulator-name = "VDD_3V3"; | ||
| regulator-min-microvolt = <3300000>; | ||
| regulator-max-microvolt = <3300000>; | ||
| regulator-always-on; | ||
| }; | ||
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| vdd_fuse_reg: REG_LDO1 { | ||
| regulator-name = "VDD_FUSE"; | ||
| regulator-min-microvolt = <2500000>; | ||
| regulator-max-microvolt = <2500000>; | ||
| regulator-always-on; | ||
| }; | ||
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| vdd_3v3_lp_reg: REG_LDO2 { | ||
| regulator-name = "VDD_3V3_LP"; | ||
| regulator-min-microvolt = <3300000>; | ||
| regulator-max-microvolt = <3300000>; | ||
| regulator-always-on; | ||
| }; | ||
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| vdd_led_reg: REG_LDO3 { | ||
| regulator-name = "VDD_LED"; | ||
| regulator-min-microvolt = <3300000>; | ||
| regulator-max-microvolt = <3300000>; | ||
| regulator-always-on; | ||
| }; | ||
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| vdd_sdhc_1v8_reg: REG_LDO4 { | ||
| regulator-name = "VDD_SDHC_1V8"; | ||
| regulator-min-microvolt = <1800000>; | ||
| regulator-max-microvolt = <1800000>; | ||
| regulator-always-on; | ||
| }; | ||
| }; | ||
| }; |
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| /* | ||
| * 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] */ | ||
|
|
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| /** | ||
| * ACT8945A Voltage Number | ||
| */ | ||
| #define ACT8945A_VOLTAGE_NUM 64 | ||
|
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| 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, | ||
| }; | ||
|
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| 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), | ||
| }; | ||
|
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| 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, | ||
| }; | ||
|
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| #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, \ | ||
| } | ||
|
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| 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"), | ||
| }; | ||
|
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| 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"), | ||
| }; | ||
|
|
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| 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; | ||
|
|
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| voltage_select = of_property_read_bool(pdev->dev.parent->of_node, | ||
| "active-semi,vsel-high"); | ||
|
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| if (voltage_select) { | ||
| regulators = act8945a_alt_regulators; | ||
| num_regulators = ARRAY_SIZE(act8945a_alt_regulators); | ||
| } else { | ||
| regulators = act8945a_regulators; | ||
| num_regulators = ARRAY_SIZE(act8945a_regulators); | ||
| } | ||
|
|
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| 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); | ||
| } | ||
| } | ||
|
|
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| return 0; | ||
| } | ||
|
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| static struct platform_driver act8945a_pmic_driver = { | ||
| .driver = { | ||
| .name = "act8945a-regulator", | ||
| }, | ||
| .probe = act8945a_pmic_probe, | ||
| }; | ||
| module_platform_driver(act8945a_pmic_driver); | ||
|
|
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| MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver"); | ||
| MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); | ||
| MODULE_LICENSE("GPL"); |
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