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214 lines
5.0 KiB
214 lines
5.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Copyright (c) 2020 MediaTek Inc. |
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#include <linux/err.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/of_device.h> |
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#include <linux/of_platform.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/soc/mediatek/mtk_dvfsrc.h> |
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#define DVFSRC_ID_VCORE 0 |
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#define DVFSRC_ID_VSCP 1 |
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#define MT_DVFSRC_REGULAR(match, _name, _volt_table) \ |
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[DVFSRC_ID_##_name] = { \ |
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.desc = { \ |
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.name = match, \ |
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.of_match = of_match_ptr(match), \ |
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.ops = &dvfsrc_vcore_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = DVFSRC_ID_##_name, \ |
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.owner = THIS_MODULE, \ |
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.n_voltages = ARRAY_SIZE(_volt_table), \ |
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.volt_table = _volt_table, \ |
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}, \ |
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} |
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/* |
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* DVFSRC regulators' information |
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* |
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* @desc: standard fields of regulator description. |
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* @voltage_selector: Selector used for get_voltage_sel() and |
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* set_voltage_sel() callbacks |
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*/ |
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struct dvfsrc_regulator { |
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struct regulator_desc desc; |
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}; |
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/* |
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* MTK DVFSRC regulators' init data |
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* |
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* @size: num of regulators |
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* @regulator_info: regulator info. |
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*/ |
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struct dvfsrc_regulator_init_data { |
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u32 size; |
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struct dvfsrc_regulator *regulator_info; |
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}; |
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static inline struct device *to_dvfsrc_dev(struct regulator_dev *rdev) |
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{ |
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return rdev_get_dev(rdev)->parent; |
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} |
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static int dvfsrc_set_voltage_sel(struct regulator_dev *rdev, |
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unsigned int selector) |
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{ |
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struct device *dvfsrc_dev = to_dvfsrc_dev(rdev); |
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int id = rdev_get_id(rdev); |
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if (id == DVFSRC_ID_VCORE) |
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mtk_dvfsrc_send_request(dvfsrc_dev, |
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MTK_DVFSRC_CMD_VCORE_REQUEST, |
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selector); |
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else if (id == DVFSRC_ID_VSCP) |
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mtk_dvfsrc_send_request(dvfsrc_dev, |
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MTK_DVFSRC_CMD_VSCP_REQUEST, |
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selector); |
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else |
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return -EINVAL; |
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return 0; |
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} |
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static int dvfsrc_get_voltage_sel(struct regulator_dev *rdev) |
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{ |
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struct device *dvfsrc_dev = to_dvfsrc_dev(rdev); |
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int id = rdev_get_id(rdev); |
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int val, ret; |
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if (id == DVFSRC_ID_VCORE) |
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ret = mtk_dvfsrc_query_info(dvfsrc_dev, |
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MTK_DVFSRC_CMD_VCORE_LEVEL_QUERY, |
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&val); |
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else if (id == DVFSRC_ID_VSCP) |
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ret = mtk_dvfsrc_query_info(dvfsrc_dev, |
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MTK_DVFSRC_CMD_VSCP_LEVEL_QUERY, |
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&val); |
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else |
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return -EINVAL; |
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if (ret != 0) |
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return ret; |
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return val; |
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} |
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static const struct regulator_ops dvfsrc_vcore_ops = { |
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.list_voltage = regulator_list_voltage_table, |
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.get_voltage_sel = dvfsrc_get_voltage_sel, |
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.set_voltage_sel = dvfsrc_set_voltage_sel, |
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}; |
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static const unsigned int mt8183_voltages[] = { |
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725000, |
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800000, |
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}; |
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static struct dvfsrc_regulator mt8183_regulators[] = { |
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MT_DVFSRC_REGULAR("dvfsrc-vcore", VCORE, |
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mt8183_voltages), |
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}; |
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static const struct dvfsrc_regulator_init_data regulator_mt8183_data = { |
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.size = ARRAY_SIZE(mt8183_regulators), |
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.regulator_info = &mt8183_regulators[0], |
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}; |
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static const unsigned int mt6873_voltages[] = { |
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575000, |
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600000, |
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650000, |
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725000, |
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}; |
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static struct dvfsrc_regulator mt6873_regulators[] = { |
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MT_DVFSRC_REGULAR("dvfsrc-vcore", VCORE, |
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mt6873_voltages), |
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MT_DVFSRC_REGULAR("dvfsrc-vscp", VSCP, |
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mt6873_voltages), |
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}; |
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static const struct dvfsrc_regulator_init_data regulator_mt6873_data = { |
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.size = ARRAY_SIZE(mt6873_regulators), |
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.regulator_info = &mt6873_regulators[0], |
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}; |
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static const struct of_device_id mtk_dvfsrc_regulator_match[] = { |
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{ |
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.compatible = "mediatek,mt8183-dvfsrc", |
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.data = ®ulator_mt8183_data, |
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}, { |
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.compatible = "mediatek,mt8192-dvfsrc", |
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.data = ®ulator_mt6873_data, |
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}, { |
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.compatible = "mediatek,mt6873-dvfsrc", |
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.data = ®ulator_mt6873_data, |
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}, { |
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/* sentinel */ |
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}, |
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}; |
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MODULE_DEVICE_TABLE(of, mtk_dvfsrc_regulator_match); |
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static int dvfsrc_vcore_regulator_probe(struct platform_device *pdev) |
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{ |
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const struct of_device_id *match; |
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struct device *dev = &pdev->dev; |
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struct regulator_config config = { }; |
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struct regulator_dev *rdev; |
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const struct dvfsrc_regulator_init_data *regulator_init_data; |
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struct dvfsrc_regulator *mt_regulators; |
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int i; |
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match = of_match_node(mtk_dvfsrc_regulator_match, dev->parent->of_node); |
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if (!match) { |
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dev_err(dev, "invalid compatible string\n"); |
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return -ENODEV; |
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} |
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regulator_init_data = match->data; |
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mt_regulators = regulator_init_data->regulator_info; |
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for (i = 0; i < regulator_init_data->size; i++) { |
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config.dev = dev->parent; |
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config.driver_data = (mt_regulators + i); |
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rdev = devm_regulator_register(dev, &(mt_regulators + i)->desc, |
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&config); |
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if (IS_ERR(rdev)) { |
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dev_err(dev, "failed to register %s\n", |
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(mt_regulators + i)->desc.name); |
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return PTR_ERR(rdev); |
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} |
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} |
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return 0; |
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} |
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static struct platform_driver mtk_dvfsrc_regulator_driver = { |
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.driver = { |
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.name = "mtk-dvfsrc-regulator", |
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}, |
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.probe = dvfsrc_vcore_regulator_probe, |
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}; |
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static int __init mtk_dvfsrc_regulator_init(void) |
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{ |
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return platform_driver_register(&mtk_dvfsrc_regulator_driver); |
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} |
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subsys_initcall(mtk_dvfsrc_regulator_init); |
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static void __exit mtk_dvfsrc_regulator_exit(void) |
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{ |
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platform_driver_unregister(&mtk_dvfsrc_regulator_driver); |
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} |
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module_exit(mtk_dvfsrc_regulator_exit); |
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MODULE_AUTHOR("Arvin wang <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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