// SPDX-License-Identifier: GPL-2.0+ // // Copyright (c) 2019 Mantas Pucka <mantas@8devices.com> // Copyright (c) 2019 Robert Marko <robert.marko@sartura.hr> // // Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> static const unsigned int ipq4019_vmmc_voltages[] = { 1500000, 1800000, 2500000, 3000000, }; static const struct regulator_ops ipq4019_regulator_voltage_ops = { .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, }; static const struct regulator_desc vmmc_regulator = { .name = "vmmcq", .ops = &ipq4019_regulator_voltage_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, .volt_table = ipq4019_vmmc_voltages, .n_voltages = ARRAY_SIZE(ipq4019_vmmc_voltages), .vsel_reg = 0, .vsel_mask = 0x3, }; static const struct regmap_config ipq4019_vmmcq_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, }; static int ipq4019_regulator_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct regulator_init_data *init_data; struct regulator_config cfg = {}; struct regulator_dev *rdev; struct regmap *rmap; void __iomem *base; init_data = of_get_regulator_init_data(dev, dev->of_node, &vmmc_regulator); if (!init_data) return -EINVAL; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) return PTR_ERR(base); rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config); if (IS_ERR(rmap)) return PTR_ERR(rmap); cfg.dev = dev; cfg.init_data = init_data; cfg.of_node = dev->of_node; cfg.regmap = rmap; rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg); if (IS_ERR(rdev)) { dev_err(dev, "Failed to register regulator: %ld\n", PTR_ERR(rdev)); return PTR_ERR(rdev); } platform_set_drvdata(pdev, rdev); return 0; } static const struct of_device_id regulator_ipq4019_of_match[] = { { .compatible = "qcom,vqmmc-ipq4019-regulator", }, {}, }; static struct platform_driver ipq4019_regulator_driver = { .probe = ipq4019_regulator_probe, .driver = { .name = "vqmmc-ipq4019-regulator", .of_match_table = of_match_ptr(regulator_ipq4019_of_match), }, }; module_platform_driver(ipq4019_regulator_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mantas Pucka <mantas@8devices.com>"); MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");