// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
 * Amlogic Meson Reset Controller driver
 *
 * Copyright (c) 2016-2024 BayLibre, SAS.
 * Authors: Neil Armstrong <narmstrong@baylibre.com>
 *          Jerome Brunet <jbrunet@baylibre.com>
 */

#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset-controller.h>

#include "reset-meson.h"

static const struct meson_reset_param meson8b_param = {
        .reset_ops      = &meson_reset_ops,
        .reset_num      = 256,
        .reset_offset   = 0x0,
        .level_offset   = 0x7c,
        .level_low_reset = true,
};

static const struct meson_reset_param meson_a1_param = {
        .reset_ops      = &meson_reset_ops,
        .reset_num      = 96,
        .reset_offset   = 0x0,
        .level_offset   = 0x40,
        .level_low_reset = true,
};

static const struct meson_reset_param meson_s4_param = {
        .reset_ops      = &meson_reset_ops,
        .reset_num      = 192,
        .reset_offset   = 0x0,
        .level_offset   = 0x40,
        .level_low_reset = true,
};

static const struct meson_reset_param t7_param = {
        .reset_num      = 224,
        .reset_offset   = 0x0,
        .level_offset   = 0x40,
        .level_low_reset = true,
};

static const struct of_device_id meson_reset_dt_ids[] = {
         { .compatible = "amlogic,meson8b-reset",    .data = &meson8b_param},
         { .compatible = "amlogic,meson-gxbb-reset", .data = &meson8b_param},
         { .compatible = "amlogic,meson-axg-reset",  .data = &meson8b_param},
         { .compatible = "amlogic,meson-a1-reset",   .data = &meson_a1_param},
         { .compatible = "amlogic,meson-s4-reset",   .data = &meson_s4_param},
         { .compatible = "amlogic,c3-reset",   .data = &meson_s4_param},
         { .compatible = "amlogic,t7-reset",   .data = &t7_param},
         { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, meson_reset_dt_ids);

static const struct regmap_config regmap_config = {
        .reg_bits   = 32,
        .val_bits   = 32,
        .reg_stride = 4,
};

static int meson_reset_probe(struct platform_device *pdev)
{
        const struct meson_reset_param *param;
        struct device *dev = &pdev->dev;
        struct regmap *map;
        void __iomem *base;

        base = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(base))
                return PTR_ERR(base);

        param = device_get_match_data(dev);
        if (!param)
                return -ENODEV;

        map = devm_regmap_init_mmio(dev, base, &regmap_config);
        if (IS_ERR(map))
                return dev_err_probe(dev, PTR_ERR(map),
                                     "can't init regmap mmio region\n");

        return meson_reset_controller_register(dev, map, param);
}

static struct platform_driver meson_reset_driver = {
        .probe  = meson_reset_probe,
        .driver = {
                .name           = "meson_reset",
                .of_match_table = meson_reset_dt_ids,
        },
};
module_platform_driver(meson_reset_driver);

MODULE_DESCRIPTION("Amlogic Meson Reset Controller driver");
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_IMPORT_NS("MESON_RESET");