projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ebf652b4 RM |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | // | |
| 3 | // Copyright (c) 2019 Mantas Pucka <mantas@8devices.com> | |
| 4 | // Copyright (c) 2019 Robert Marko <robert.marko@sartura.hr> | |
| 5 | // | |
| 6 | // Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator | |
| 7 | ||
| 8 | #include <linux/io.h> | |
| 9 | #include <linux/module.h> | |
| 10 | #include <linux/of.h> | |
| 11 | #include <linux/platform_device.h> | |
| 12 | #include <linux/regmap.h> | |
| 13 | #include <linux/regulator/driver.h> | |
| 14 | #include <linux/regulator/machine.h> | |
| 15 | #include <linux/regulator/of_regulator.h> | |
| 16 | ||
| 17 | static const unsigned int ipq4019_vmmc_voltages[] = { | |
| 18 | 1500000, 1800000, 2500000, 3000000, | |
| 19 | }; | |
| 20 | ||
| 21 | static struct regulator_ops ipq4019_regulator_voltage_ops = { | |
| 22 | .list_voltage = regulator_list_voltage_table, | |
| 23 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
| 24 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
| 25 | }; | |
| 26 | ||
| 27 | static struct regulator_desc vmmc_regulator = { | |
| 28 | .name = "vmmcq", | |
| 29 | .ops = &ipq4019_regulator_voltage_ops, | |
| 30 | .type = REGULATOR_VOLTAGE, | |
| 31 | .owner = THIS_MODULE, | |
| 32 | .volt_table = ipq4019_vmmc_voltages, | |
| 33 | .n_voltages = ARRAY_SIZE(ipq4019_vmmc_voltages), | |
| 34 | .vsel_reg = 0, | |
| 35 | .vsel_mask = 0x3, | |
| 36 | }; | |
| 37 | ||
| 38 | const struct regmap_config ipq4019_vmmcq_regmap_config = { | |
| 39 | .reg_bits = 32, | |
| 40 | .reg_stride = 4, | |
| 41 | .val_bits = 32, | |
| 42 | }; | |
| 43 | ||
| 44 | static int ipq4019_regulator_probe(struct platform_device *pdev) | |
| 45 | { | |
| 46 | struct device *dev = &pdev->dev; | |
| 47 | struct regulator_init_data *init_data; | |
| 48 | struct regulator_config cfg = {}; | |
| 49 | struct regulator_dev *rdev; | |
| 50 | struct resource *res; | |
| 51 | struct regmap *rmap; | |
| 52 | void __iomem *base; | |
| 53 | ||
| 54 | init_data = of_get_regulator_init_data(dev, dev->of_node, | |
| 55 | &vmmc_regulator); | |
| 56 | if (!init_data) | |
| 57 | return -EINVAL; | |
| 58 | ||
| 59 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 60 | base = devm_ioremap_resource(dev, res); | |
| 61 | if (IS_ERR(base)) | |
| 62 | return PTR_ERR(base); | |
| 63 | ||
| 64 | rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config); | |
| 65 | if (IS_ERR(rmap)) | |
| 66 | return PTR_ERR(rmap); | |
| 67 | ||
| 68 | cfg.dev = dev; | |
| 69 | cfg.init_data = init_data; | |
| 70 | cfg.of_node = dev->of_node; | |
| 71 | cfg.regmap = rmap; | |
| 72 | ||
| 73 | rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg); | |
| 74 | if (IS_ERR(rdev)) { | |
| 75 | dev_err(dev, "Failed to register regulator: %ld\n", | |
| 76 | PTR_ERR(rdev)); | |
| 77 | return PTR_ERR(rdev); | |
| 78 | } | |
| 79 | platform_set_drvdata(pdev, rdev); | |
| 80 | ||
| 81 | return 0; | |
| 82 | } | |
| 83 | ||
| 84 | static int ipq4019_regulator_remove(struct platform_device *pdev) | |
| 85 | { | |
| 86 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
| 87 | ||
| 88 | regulator_unregister(rdev); | |
| 89 | ||
| 90 | return 0; | |
| 91 | } | |
| 92 | ||
| 93 | static const struct of_device_id regulator_ipq4019_of_match[] = { | |
| 94 | { .compatible = "qcom,vqmmc-ipq4019-regulator", }, | |
| 95 | {}, | |
| 96 | }; | |
| 97 | ||
| 98 | static struct platform_driver ipq4019_regulator_driver = { | |
| 99 | .probe = ipq4019_regulator_probe, | |
| 100 | .remove = ipq4019_regulator_remove, | |
| 101 | .driver = { | |
| 102 | .name = "vqmmc-ipq4019-regulator", | |
| 103 | .owner = THIS_MODULE, | |
| 104 | .of_match_table = of_match_ptr(regulator_ipq4019_of_match), | |
| 105 | }, | |
| 106 | }; | |
| 107 | module_platform_driver(ipq4019_regulator_driver); | |
| 108 | ||
| 109 | MODULE_LICENSE("GPL"); | |
| 110 | MODULE_AUTHOR("Mantas Pucka <mantas@8devices.com>"); | |
| 111 | MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator"); |