// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018, The Linux Foundation. All rights reserved.

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>

static const struct clk_parent_data aux_parents[] = {
        { .fw_name = "pll8_vote", .name = "pll8_vote" },
        { .fw_name = "pxo", .name = "pxo_board" },
};

static const u32 aux_parent_map[] = {
        3,
        0,
};

static const struct of_device_id kpss_xcc_match_table[] = {
        { .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
        { .compatible = "qcom,kpss-gcc" },
        {}
};
MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);

static int kpss_xcc_driver_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        void __iomem *base;
        struct clk_hw *hw;
        const char *name;

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

        if (device_get_match_data(&pdev->dev)) {
                if (of_property_read_string_index(dev->of_node,
                                                  "clock-output-names",
                                                  0, &name))
                        return -ENODEV;
                base += 0x14;
        } else {
                name = "acpu_l2_aux";
                base += 0x28;
        }

        hw = devm_clk_hw_register_mux_parent_data_table(dev, name, aux_parents,
                                                        ARRAY_SIZE(aux_parents), 0,
                                                        base, 0, 0x3,
                                                        0, aux_parent_map, NULL);
        if (IS_ERR(hw))
                return PTR_ERR(hw);

        return of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, hw);
}

static struct platform_driver kpss_xcc_driver = {
        .probe = kpss_xcc_driver_probe,
        .driver = {
                .name = "kpss-xcc",
                .of_match_table = kpss_xcc_match_table,
        },
};
module_platform_driver(kpss_xcc_driver);

MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:kpss-xcc");