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128 lines
3.1 KiB
128 lines
3.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Device driver for Hi6421 PMIC |
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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) <2013-2017> Linaro Ltd. |
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* https://www.linaro.org |
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* |
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* Author: Guodong Xu <[email protected]> |
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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/mfd/hi6421-pmic.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.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 const struct mfd_cell hi6421v530_devs[] = { |
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{ .name = "hi6421v530-regulator", }, |
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}; |
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static const 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 const struct of_device_id of_hi6421_pmic_match[] = { |
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{ |
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.compatible = "hisilicon,hi6421-pmic", |
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.data = (void *)HI6421 |
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}, |
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{ |
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.compatible = "hisilicon,hi6421v530-pmic", |
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.data = (void *)HI6421_V530 |
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}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match); |
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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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const struct of_device_id *id; |
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const struct mfd_cell *subdevs; |
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enum hi6421_type type; |
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void __iomem *base; |
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int n_subdevs, ret; |
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id = of_match_device(of_hi6421_pmic_match, &pdev->dev); |
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if (!id) |
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return -EINVAL; |
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type = (enum hi6421_type)id->data; |
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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, "Failed to initialise Regmap: %ld\n", |
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PTR_ERR(pmic->regmap)); |
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return PTR_ERR(pmic->regmap); |
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} |
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platform_set_drvdata(pdev, pmic); |
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switch (type) { |
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case HI6421: |
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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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subdevs = hi6421_devs; |
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n_subdevs = ARRAY_SIZE(hi6421_devs); |
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break; |
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case HI6421_V530: |
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subdevs = hi6421v530_devs; |
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n_subdevs = ARRAY_SIZE(hi6421v530_devs); |
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break; |
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default: |
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dev_err(&pdev->dev, "Unknown device type %d\n", |
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(unsigned int)type); |
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return -EINVAL; |
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} |
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ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, |
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subdevs, n_subdevs, NULL, 0, NULL); |
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if (ret) { |
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dev_err(&pdev->dev, "Failed to add child devices: %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 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, |
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}, |
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.probe = hi6421_pmic_probe, |
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}; |
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module_platform_driver(hi6421_pmic_driver); |
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MODULE_AUTHOR("Guodong Xu <[email protected]>"); |
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MODULE_DESCRIPTION("Hi6421 PMIC driver"); |
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MODULE_LICENSE("GPL v2");
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