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154 lines
4.8 KiB
C
154 lines
4.8 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022 Analog Devices, Inc.
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* ADI Regulator driver for the MAX77540 and MAX77541
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*/
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#include <linux/mfd/max77541.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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static const struct regulator_ops max77541_buck_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_pickable_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
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};
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static const struct linear_range max77540_buck_ranges[] = {
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/* Ranges when VOLT_SEL bits are 0x00 */
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REGULATOR_LINEAR_RANGE(500000, 0x00, 0x8B, 5000),
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REGULATOR_LINEAR_RANGE(1200000, 0x8C, 0xFF, 0),
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/* Ranges when VOLT_SEL bits are 0x40 */
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REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000),
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REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0),
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/* Ranges when VOLT_SEL bits are 0x80 */
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REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000),
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REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0),
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};
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static const struct linear_range max77541_buck_ranges[] = {
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/* Ranges when VOLT_SEL bits are 0x00 */
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REGULATOR_LINEAR_RANGE(300000, 0x00, 0xB3, 5000),
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REGULATOR_LINEAR_RANGE(1200000, 0xB4, 0xFF, 0),
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/* Ranges when VOLT_SEL bits are 0x40 */
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REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000),
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REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0),
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/* Ranges when VOLT_SEL bits are 0x80 */
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REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000),
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REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0),
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};
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static const unsigned int max77541_buck_volt_range_sel[] = {
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0x00, 0x00, 0x40, 0x40, 0x80, 0x80,
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};
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enum max77541_regulators {
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MAX77541_BUCK1 = 1,
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MAX77541_BUCK2,
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};
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#define MAX77540_BUCK(_id, _ops) \
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{ .id = MAX77541_BUCK ## _id, \
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.name = "buck"#_id, \
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.of_match = "buck"#_id, \
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.regulators_node = "regulators", \
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.enable_reg = MAX77541_REG_EN_CTRL, \
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.enable_mask = MAX77541_BIT_M ## _id ## _EN, \
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.ops = &(_ops), \
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.type = REGULATOR_VOLTAGE, \
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.linear_ranges = max77540_buck_ranges, \
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.n_linear_ranges = ARRAY_SIZE(max77540_buck_ranges), \
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.vsel_reg = MAX77541_REG_M ## _id ## _VOUT, \
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.vsel_mask = MAX77541_BITS_MX_VOUT, \
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.vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1, \
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.vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG, \
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.linear_range_selectors = max77541_buck_volt_range_sel, \
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.owner = THIS_MODULE, \
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}
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#define MAX77541_BUCK(_id, _ops) \
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{ .id = MAX77541_BUCK ## _id, \
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.name = "buck"#_id, \
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.of_match = "buck"#_id, \
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.regulators_node = "regulators", \
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.enable_reg = MAX77541_REG_EN_CTRL, \
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.enable_mask = MAX77541_BIT_M ## _id ## _EN, \
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.ops = &(_ops), \
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.type = REGULATOR_VOLTAGE, \
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.linear_ranges = max77541_buck_ranges, \
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.n_linear_ranges = ARRAY_SIZE(max77541_buck_ranges), \
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.vsel_reg = MAX77541_REG_M ## _id ## _VOUT, \
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.vsel_mask = MAX77541_BITS_MX_VOUT, \
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.vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1, \
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.vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG, \
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.linear_range_selectors = max77541_buck_volt_range_sel, \
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.owner = THIS_MODULE, \
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}
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static const struct regulator_desc max77540_regulators_desc[] = {
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MAX77540_BUCK(1, max77541_buck_ops),
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MAX77540_BUCK(2, max77541_buck_ops),
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};
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static const struct regulator_desc max77541_regulators_desc[] = {
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MAX77541_BUCK(1, max77541_buck_ops),
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MAX77541_BUCK(2, max77541_buck_ops),
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};
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static int max77541_regulator_probe(struct platform_device *pdev)
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{
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struct regulator_config config = {};
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const struct regulator_desc *desc;
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struct device *dev = &pdev->dev;
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struct regulator_dev *rdev;
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struct max77541 *max77541 = dev_get_drvdata(dev->parent);
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unsigned int i;
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config.dev = dev->parent;
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switch (max77541->id) {
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case MAX77540:
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desc = max77540_regulators_desc;
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break;
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case MAX77541:
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desc = max77541_regulators_desc;
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break;
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default:
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return -EINVAL;
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}
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for (i = 0; i < MAX77541_MAX_REGULATORS; i++) {
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rdev = devm_regulator_register(dev, &desc[i], &config);
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if (IS_ERR(rdev))
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return dev_err_probe(dev, PTR_ERR(rdev),
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"Failed to register regulator\n");
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}
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return 0;
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}
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static const struct platform_device_id max77541_regulator_platform_id[] = {
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{ "max77540-regulator" },
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{ "max77541-regulator" },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, max77541_regulator_platform_id);
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static struct platform_driver max77541_regulator_driver = {
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.driver = {
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.name = "max77541-regulator",
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},
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.probe = max77541_regulator_probe,
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.id_table = max77541_regulator_platform_id,
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};
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module_platform_driver(max77541_regulator_driver);
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MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>");
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MODULE_DESCRIPTION("MAX77540/MAX77541 regulator driver");
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MODULE_LICENSE("GPL");
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