regulator: Remove mtk-dvfsrc-regulator.c

This driver never worked, and never got even compiled, because it was
missing the DVFSRC driver entirely, including headers it relies on!

In preparation of a full refactoring of this driver, remove it.

The Makefile and Kconfig entries are retained, as those are reused
as-is for the refactored code.
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20240610085735.147134-6-angelogioacchino.delregno@collabora.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mtk-dvfsrc-regulator.c

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