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101 lines
2.7 KiB
101 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// Copyright (c) 2019 Mantas Pucka <[email protected]> |
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// Copyright (c) 2019 Robert Marko <[email protected]> |
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// |
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// Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/of.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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#include <linux/regulator/machine.h> |
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#include <linux/regulator/of_regulator.h> |
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static const unsigned int ipq4019_vmmc_voltages[] = { |
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1500000, 1800000, 2500000, 3000000, |
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}; |
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static const struct regulator_ops ipq4019_regulator_voltage_ops = { |
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.list_voltage = regulator_list_voltage_table, |
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.map_voltage = regulator_map_voltage_ascend, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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}; |
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static const struct regulator_desc vmmc_regulator = { |
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.name = "vmmcq", |
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.ops = &ipq4019_regulator_voltage_ops, |
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.type = REGULATOR_VOLTAGE, |
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.owner = THIS_MODULE, |
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.volt_table = ipq4019_vmmc_voltages, |
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.n_voltages = ARRAY_SIZE(ipq4019_vmmc_voltages), |
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.vsel_reg = 0, |
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.vsel_mask = 0x3, |
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}; |
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static const struct regmap_config ipq4019_vmmcq_regmap_config = { |
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.reg_bits = 32, |
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.reg_stride = 4, |
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.val_bits = 32, |
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}; |
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static int ipq4019_regulator_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct regulator_init_data *init_data; |
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struct regulator_config cfg = {}; |
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struct regulator_dev *rdev; |
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struct resource *res; |
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struct regmap *rmap; |
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void __iomem *base; |
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init_data = of_get_regulator_init_data(dev, dev->of_node, |
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&vmmc_regulator); |
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if (!init_data) |
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return -EINVAL; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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base = devm_ioremap_resource(dev, res); |
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if (IS_ERR(base)) |
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return PTR_ERR(base); |
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rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config); |
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if (IS_ERR(rmap)) |
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return PTR_ERR(rmap); |
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cfg.dev = dev; |
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cfg.init_data = init_data; |
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cfg.of_node = dev->of_node; |
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cfg.regmap = rmap; |
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rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg); |
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if (IS_ERR(rdev)) { |
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dev_err(dev, "Failed to register regulator: %ld\n", |
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PTR_ERR(rdev)); |
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return PTR_ERR(rdev); |
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} |
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platform_set_drvdata(pdev, rdev); |
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return 0; |
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} |
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static const struct of_device_id regulator_ipq4019_of_match[] = { |
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{ .compatible = "qcom,vqmmc-ipq4019-regulator", }, |
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{}, |
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}; |
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static struct platform_driver ipq4019_regulator_driver = { |
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.probe = ipq4019_regulator_probe, |
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.driver = { |
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.name = "vqmmc-ipq4019-regulator", |
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.of_match_table = of_match_ptr(regulator_ipq4019_of_match), |
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}, |
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}; |
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module_platform_driver(ipq4019_regulator_driver); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Mantas Pucka <[email protected]>"); |
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MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");
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