// 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. * http://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_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");