153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2021 MediaTek Inc.
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*/
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#include <linux/kernel.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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#include "generic_debugfs.h"
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#include <linux/extdev_io_class.h>
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#define MT6360_DATA 1
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#define MT6375_DATA 2
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struct subpmic_dbg_info {
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struct device *dev;
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struct extdev_desc extdev_desc;
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struct extdev_io_device *extdev;
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struct dbg_info dbg_info;
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};
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struct subpmic_data {
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const char *bus;
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const char *name;
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};
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static int subpmic_dbg_io_read(void *drvdata, u16 reg, void *val, u16 size)
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{
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return regmap_bulk_read((struct regmap *)drvdata, reg, val, size);
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}
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static int subpmic_dbg_io_write(void *drvdata,
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u16 reg, const void *val, u16 size)
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{
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return regmap_bulk_write((struct regmap *)drvdata, reg, val, size);
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}
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static int subpmic_dbg_probe(struct platform_device *pdev)
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{
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struct subpmic_dbg_info *mdi;
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struct regmap *regmap;
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const struct subpmic_data *sdata;
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const struct platform_device_id *id;
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char *dirname, *typestr;
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int ret;
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mdi = devm_kzalloc(&pdev->dev, sizeof(*mdi), GFP_KERNEL);
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if (!mdi)
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return -ENOMEM;
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mdi->dev = &pdev->dev;
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platform_set_drvdata(pdev, mdi);
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regmap = dev_get_regmap(pdev->dev.parent, NULL);
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if (!regmap) {
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dev_err(&pdev->dev, "failed to allocate regmap\n");
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return -ENODEV;
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}
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if (pdev->dev.of_node)
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sdata = of_device_get_match_data(&pdev->dev);
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else {
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id = platform_get_device_id(pdev);
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sdata = (struct subpmic_data *)id->driver_data;
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}
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if (!sdata) {
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dev_err(&pdev->dev, "failed to get subpimic data\n");
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return -ENODEV;
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}
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dirname = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s.%s", sdata->name,
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dev_name(pdev->dev.parent));
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typestr = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s,%s", sdata->bus,
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sdata->name);
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if (!dirname || !typestr)
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return -ENOMEM;
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/* sysfs interface */
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mdi->extdev_desc.dirname = dirname;
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mdi->extdev_desc.devname = dev_name(pdev->dev.parent);
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mdi->extdev_desc.typestr = typestr;
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mdi->extdev_desc.rmap = regmap;
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mdi->extdev_desc.io_read = subpmic_dbg_io_read;
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mdi->extdev_desc.io_write = subpmic_dbg_io_write;
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mdi->extdev = devm_extdev_io_device_register(pdev->dev.parent, &mdi->extdev_desc);
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if (IS_ERR(mdi->extdev)) {
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dev_err(&pdev->dev, "failed to register extdev_io device\n", __func__);
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return PTR_ERR(mdi->extdev);
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}
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/* debugfs interface */
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mdi->dbg_info.dirname = dirname;
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mdi->dbg_info.devname = dev_name(pdev->dev.parent);
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mdi->dbg_info.typestr = typestr;
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mdi->dbg_info.io_drvdata = regmap;
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mdi->dbg_info.io_read = subpmic_dbg_io_read;
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mdi->dbg_info.io_write = subpmic_dbg_io_write;
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ret = generic_debugfs_register(&mdi->dbg_info);
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if (ret < 0)
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return ret;
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dev_info(&pdev->dev, "%s: successfully\n", __func__);
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return 0;
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}
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static int subpmic_dbg_remove(struct platform_device *pdev)
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{
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struct subpmic_dbg_info *mdi = platform_get_drvdata(pdev);
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generic_debugfs_unregister(&mdi->dbg_info);
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return 0;
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}
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static const struct subpmic_data mt6360_data = {
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.bus = "I2C",
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.name = "MT6360",
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};
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static const struct subpmic_data mt6375_data = {
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.bus = "I2C",
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.name = "MT6375",
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};
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static const struct of_device_id __maybe_unused subpmic_dbg_of_id[] = {
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{ .compatible = "mediatek,mt6360-dbg", .data = &mt6360_data},
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{ .compatible = "mediatek,mt6375-dbg", .data = &mt6375_data},
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{ }
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};
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MODULE_DEVICE_TABLE(of, subpmic_dbg_of_id);
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static const struct platform_device_id subpmic_dbg_id[] = {
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{ "mt6360_dbg", (kernel_ulong_t)&mt6360_data},
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{ "mt6375_dbg", (kernel_ulong_t)&mt6375_data},
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{ }
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};
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MODULE_DEVICE_TABLE(platform, subpmic_dbg_id);
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static struct platform_driver subpmic_dbg_driver = {
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.driver = {
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.name = "subpmic_dbg",
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.of_match_table = subpmic_dbg_of_id,
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},
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.probe = subpmic_dbg_probe,
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.remove = subpmic_dbg_remove,
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.id_table = subpmic_dbg_id,
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};
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module_platform_driver(subpmic_dbg_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("alice_chen <alice_chen@richtek.com>");
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MODULE_DESCRIPTION("Subpmic Debug driver");
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