| /* |
| * 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"); |