// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2014 Free Electrons
 *
 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
 *
 * Allwinner PRCM (Power/Reset/Clock Management) driver
 */

#include <linux/mfd/core.h>
#include <linux/init.h>
#include <linux/of.h>

#define SUN8I_CODEC_ANALOG_BASE 0x1c0
#define SUN8I_CODEC_ANALOG_SIZE 0x4

struct prcm_data {
        int nsubdevs;
        const struct mfd_cell *subdevs;
};

static const struct resource sun6i_a31_ar100_clk_res[] = {
        DEFINE_RES_MEM(0x0, 4)
};

static const struct resource sun6i_a31_apb0_clk_res[] = {
        DEFINE_RES_MEM(0xc, 4)
};

static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
        DEFINE_RES_MEM(0x28, 4)
};

static const struct resource sun6i_a31_ir_clk_res[] = {
        DEFINE_RES_MEM(0x54, 4)
};

static const struct resource sun6i_a31_apb0_rstc_res[] = {
        DEFINE_RES_MEM(0xb0, 4)
};

static const struct resource sun8i_codec_analog_res[] = {
        DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
};

static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
        {
                .name = "sun6i-a31-ar100-clk",
                .of_compatible = "allwinner,sun6i-a31-ar100-clk",
                .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
                .resources = sun6i_a31_ar100_clk_res,
        },
        {
                .name = "sun6i-a31-apb0-clk",
                .of_compatible = "allwinner,sun6i-a31-apb0-clk",
                .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
                .resources = sun6i_a31_apb0_clk_res,
        },
        {
                .name = "sun6i-a31-apb0-gates-clk",
                .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
                .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
                .resources = sun6i_a31_apb0_gates_clk_res,
        },
        {
                .name = "sun6i-a31-ir-clk",
                .of_compatible = "allwinner,sun4i-a10-mod0-clk",
                .num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
                .resources = sun6i_a31_ir_clk_res,
        },
        {
                .name = "sun6i-a31-apb0-clock-reset",
                .of_compatible = "allwinner,sun6i-a31-clock-reset",
                .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
                .resources = sun6i_a31_apb0_rstc_res,
        },
};

static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
        {
                .name = "sun8i-a23-apb0-clk",
                .of_compatible = "allwinner,sun8i-a23-apb0-clk",
                .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
                .resources = sun6i_a31_apb0_clk_res,
        },
        {
                .name = "sun6i-a31-apb0-gates-clk",
                .of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
                .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
                .resources = sun6i_a31_apb0_gates_clk_res,
        },
        {
                .name = "sun6i-a31-apb0-clock-reset",
                .of_compatible = "allwinner,sun6i-a31-clock-reset",
                .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
                .resources = sun6i_a31_apb0_rstc_res,
        },
        {
                .name           = "sun8i-codec-analog",
                .of_compatible  = "allwinner,sun8i-a23-codec-analog",
                .num_resources  = ARRAY_SIZE(sun8i_codec_analog_res),
                .resources      = sun8i_codec_analog_res,
        },
};

static const struct prcm_data sun6i_a31_prcm_data = {
        .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
        .subdevs = sun6i_a31_prcm_subdevs,
};

static const struct prcm_data sun8i_a23_prcm_data = {
        .nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
        .subdevs = sun8i_a23_prcm_subdevs,
};

static const struct of_device_id sun6i_prcm_dt_ids[] = {
        {
                .compatible = "allwinner,sun6i-a31-prcm",
                .data = &sun6i_a31_prcm_data,
        },
        {
                .compatible = "allwinner,sun8i-a23-prcm",
                .data = &sun8i_a23_prcm_data,
        },
        { /* sentinel */ },
};

static int sun6i_prcm_probe(struct platform_device *pdev)
{
        const struct of_device_id *match;
        const struct prcm_data *data;
        struct resource *res;
        int ret;

        match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
        if (!match)
                return -EINVAL;

        data = match->data;

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                dev_err(&pdev->dev, "no prcm memory region provided\n");
                return -ENOENT;
        }

        ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
                              res, -1, NULL);
        if (ret) {
                dev_err(&pdev->dev, "failed to add subdevices\n");
                return ret;
        }

        return 0;
}

static struct platform_driver sun6i_prcm_driver = {
        .driver = {
                .name = "sun6i-prcm",
                .of_match_table = sun6i_prcm_dt_ids,
        },
        .probe = sun6i_prcm_probe,
};
builtin_platform_driver(sun6i_prcm_driver);