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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | // SPDX-License-Identifier: GPL-2.0-only /* * Device driver for Hi6421 PMIC * * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd. * http://www.hisilicon.com * Copyright (c) <2013-2017> Linaro Ltd. * https://www.linaro.org * * Author: Guodong Xu <guodong.xu@linaro.org> */ #include <linux/device.h> #include <linux/err.h> #include <linux/mfd/core.h> #include <linux/mfd/hi6421-pmic.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/regmap.h> static const struct mfd_cell hi6421_devs[] = { { .name = "hi6421-regulator", }, }; static const struct mfd_cell hi6421v530_devs[] = { { .name = "hi6421v530-regulator", }, }; static const struct regmap_config hi6421_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 8, .max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX), }; static const struct of_device_id of_hi6421_pmic_match[] = { { .compatible = "hisilicon,hi6421-pmic", .data = (void *)HI6421 }, { .compatible = "hisilicon,hi6421v530-pmic", .data = (void *)HI6421_V530 }, { }, }; MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match); static int hi6421_pmic_probe(struct platform_device *pdev) { struct hi6421_pmic *pmic; const struct mfd_cell *subdevs; enum hi6421_type type; void __iomem *base; int n_subdevs, ret; type = (uintptr_t)device_get_match_data(&pdev->dev); pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); if (!pmic) return -ENOMEM; base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); if (IS_ERR(base)) return PTR_ERR(base); pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base, &hi6421_regmap_config); if (IS_ERR(pmic->regmap)) { dev_err(&pdev->dev, "Failed to initialise Regmap: %ld\n", PTR_ERR(pmic->regmap)); return PTR_ERR(pmic->regmap); } platform_set_drvdata(pdev, pmic); switch (type) { case HI6421: /* set over-current protection debounce 8ms */ regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG, (HI6421_OCP_DEB_SEL_MASK | HI6421_OCP_EN_DEBOUNCE_MASK | HI6421_OCP_AUTO_STOP_MASK), (HI6421_OCP_DEB_SEL_8MS | HI6421_OCP_EN_DEBOUNCE_ENABLE)); subdevs = hi6421_devs; n_subdevs = ARRAY_SIZE(hi6421_devs); break; case HI6421_V530: subdevs = hi6421v530_devs; n_subdevs = ARRAY_SIZE(hi6421v530_devs); break; default: dev_err(&pdev->dev, "Unknown device type %d\n", (unsigned int)type); return -EINVAL; } ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, subdevs, n_subdevs, NULL, 0, NULL); if (ret) { dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret); return ret; } return 0; } static struct platform_driver hi6421_pmic_driver = { .driver = { .name = "hi6421_pmic", .of_match_table = of_hi6421_pmic_match, }, .probe = hi6421_pmic_probe, }; module_platform_driver(hi6421_pmic_driver); MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>"); MODULE_DESCRIPTION("Hi6421 PMIC driver"); MODULE_LICENSE("GPL v2"); |