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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | /* * Device driver for Hi6421 PMIC * * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd. * http://www.hisilicon.com * Copyright (c) <2013-2017> Linaro Ltd. * http://www.linaro.org * * Author: Guodong Xu <guodong.xu@linaro.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #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_device.h> #include <linux/platform_device.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; struct resource *res; const struct of_device_id *id; const struct mfd_cell *subdevs; enum hi6421_type type; void __iomem *base; int n_subdevs, ret; id = of_match_device(of_hi6421_pmic_match, &pdev->dev); if (!id) return -EINVAL; type = (enum hi6421_type)id->data; pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); if (!pmic) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); 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"); |