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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 | /* * Device driver for Hi6421 IC * * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd. * http://www.hisilicon.com * Copyright (c) <2013-2014> 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 as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/device.h> #include <linux/err.h> #include <linux/mfd/core.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/mfd/hi6421-pmic.h> static const struct mfd_cell hi6421_devs[] = { { .name = "hi6421-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 int hi6421_pmic_probe(struct platform_device *pdev) { struct hi6421_pmic *pmic; struct resource *res; void __iomem *base; int ret; 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, "regmap init failed: %ld\n", PTR_ERR(pmic->regmap)); return PTR_ERR(pmic->regmap); } /* 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)); platform_set_drvdata(pdev, pmic); ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421_devs, ARRAY_SIZE(hi6421_devs), NULL, 0, NULL); if (ret) { dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret); return ret; } return 0; } static const struct of_device_id of_hi6421_pmic_match_tbl[] = { { .compatible = "hisilicon,hi6421-pmic", }, { }, }; MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl); static struct platform_driver hi6421_pmic_driver = { .driver = { .name = "hi6421_pmic", .of_match_table = of_hi6421_pmic_match_tbl, }, .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"); |