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This adds driver to support HiSilicon Hi6421 PMIC. Hi6421 includes multi- functions, such as regulators, codec, ADCs, Coulomb counter, etc. This driver includes core APIs _only_. Drivers for individul components, like voltage regulators, are implemented in corresponding driver directories and files. Registers in Hi6421 are memory mapped, so using regmap-mmio API. Signed-off-by: Guodong Xu <guodong.xu@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
/*
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* Device driver for Hi6421 IC
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*
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* Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
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* http://www.hisilicon.com
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* Copyright (c) <2013-2014> Linaro Ltd.
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* http://www.linaro.org
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*
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* Author: Guodong Xu <guodong.xu@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/hi6421-pmic.h>
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static const struct mfd_cell hi6421_devs[] = {
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{ .name = "hi6421-regulator", },
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};
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static struct regmap_config hi6421_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 8,
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.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
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};
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static int hi6421_pmic_probe(struct platform_device *pdev)
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{
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struct hi6421_pmic *pmic;
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struct resource *res;
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void __iomem *base;
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int ret;
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pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
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if (!pmic)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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base = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(base))
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return PTR_ERR(base);
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pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
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&hi6421_regmap_config);
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if (IS_ERR(pmic->regmap)) {
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dev_err(&pdev->dev,
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"regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
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return PTR_ERR(pmic->regmap);
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}
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/* set over-current protection debounce 8ms */
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regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
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(HI6421_OCP_DEB_SEL_MASK
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| HI6421_OCP_EN_DEBOUNCE_MASK
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| HI6421_OCP_AUTO_STOP_MASK),
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(HI6421_OCP_DEB_SEL_8MS
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| HI6421_OCP_EN_DEBOUNCE_ENABLE));
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platform_set_drvdata(pdev, pmic);
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ret = mfd_add_devices(&pdev->dev, 0, hi6421_devs,
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ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
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if (ret) {
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dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int hi6421_pmic_remove(struct platform_device *pdev)
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{
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mfd_remove_devices(&pdev->dev);
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return 0;
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}
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static struct of_device_id of_hi6421_pmic_match_tbl[] = {
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{ .compatible = "hisilicon,hi6421-pmic", },
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{ },
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};
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static struct platform_driver hi6421_pmic_driver = {
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.driver = {
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.name = "hi6421_pmic",
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.of_match_table = of_hi6421_pmic_match_tbl,
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},
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.probe = hi6421_pmic_probe,
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.remove = hi6421_pmic_remove,
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};
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module_platform_driver(hi6421_pmic_driver);
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MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
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MODULE_DESCRIPTION("Hi6421 PMIC driver");
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MODULE_LICENSE("GPL v2");
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