mirror of
https://github.com/physwizz/a155-U-u1.git
synced 2024-11-19 13:27:49 +00:00
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020 MediaTek Inc.
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*/
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#include <linux/init.h>
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#include <linux/kernel.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/slab.h>
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#include "generic_debugfs.h"
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#include <linux/extdev_io_class.h>
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struct mt6375_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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static int mt6375_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 mt6375_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 mt6375_dbg_probe(struct platform_device *pdev)
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{
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struct mt6375_dbg_info *mdi;
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struct regmap *regmap;
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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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/* sysfs interface */
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mdi->extdev_desc.dirname = devm_kasprintf(&pdev->dev,
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GFP_KERNEL, "MT6375.%s",
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dev_name(pdev->dev.parent));
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mdi->extdev_desc.devname = dev_name(pdev->dev.parent);
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mdi->extdev_desc.typestr = devm_kasprintf(&pdev->dev,
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GFP_KERNEL, "I2C,MT6375");
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mdi->extdev_desc.rmap = regmap;
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mdi->extdev_desc.io_read = mt6375_dbg_io_read;
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mdi->extdev_desc.io_write = mt6375_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 = devm_kasprintf(&pdev->dev,
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GFP_KERNEL, "MT6375.%s",
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dev_name(pdev->dev.parent));
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mdi->dbg_info.devname = dev_name(pdev->dev.parent);
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mdi->dbg_info.typestr = devm_kasprintf(&pdev->dev,
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GFP_KERNEL, "I2C,MT6375");
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mdi->dbg_info.io_drvdata = regmap;
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mdi->dbg_info.io_read = mt6375_dbg_io_read;
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mdi->dbg_info.io_write = mt6375_dbg_io_write;
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ret = generic_debugfs_init(&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 mt6375_dbg_remove(struct platform_device *pdev)
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{
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struct mt6375_dbg_info *mdi = platform_get_drvdata(pdev);
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generic_debugfs_exit(&mdi->dbg_info);
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return 0;
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}
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static const struct platform_device_id mt6375_dbg_id[] = {
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{ "mt6375-dbg", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(platform, mt6375_dbg_id);
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static const struct of_device_id mt6375_dbg_of_id[] = {
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{ .compatible = "mediatek,mt6375-dbg", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, mt6375_dbg_of_id);
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static struct platform_driver mt6375_dbg_driver = {
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.driver = {
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.name = "mt6375_dbg",
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.of_match_table = of_match_ptr(mt6375_dbg_of_id),
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},
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.probe = mt6375_dbg_probe,
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.remove = mt6375_dbg_remove,
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.id_table = mt6375_dbg_id,
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};
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module_platform_driver(mt6375_dbg_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("cy_huang <cy_huang@richtek.com>");
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