/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2019 MediaTek Inc.
*/

#include <linux/clk-provider.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>

#include "clk-mtk.h"
#include "clk-gate.h"

#include <dt-bindings/clock/mt6877-clk.h>

#define MT_CCF_BRINGUP		1

/* Regular Number Definition */
#define INV_OFS			-1
#define INV_BIT			-1

static const struct mtk_gate_regs msdc0_cg_regs = {
	.set_ofs = 0x68,
	.clr_ofs = 0x68,
	.sta_ofs = 0x68,
};

#define GATE_MSDC0(_id, _name, _parent, _shift) {	\
		.id = _id,				\
		.name = _name,				\
		.parent_name = _parent,			\
		.regs = &msdc0_cg_regs,			\
		.shift = _shift,			\
		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
	}

static const struct mtk_gate msdc0_clks[] = {
	GATE_MSDC0(CLK_MSDC0_MSDC_NEW_RX_PATH_SEL, "msdc0_msdc_rx",
			"msdc_new_rx_ck"/* parent */, 0),
};

static int clk_mt6877_msdc0_probe(struct platform_device *pdev)
{
	struct clk_onecell_data *clk_data;
	int r;
	struct device_node *node = pdev->dev.of_node;

#if MT_CCF_BRINGUP
	pr_notice("%s init begin\n", __func__);
#endif

	clk_data = mtk_alloc_clk_data(CLK_MSDC0_NR_CLK);

	mtk_clk_register_gates(node, msdc0_clks, ARRAY_SIZE(msdc0_clks),
			clk_data);

	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);

	if (r)
		pr_err("%s(): could not register clock provider: %d\n",
			__func__, r);

#if MT_CCF_BRINGUP
	pr_notice("%s init end\n", __func__);
#endif

	return r;
}

static const struct of_device_id of_match_clk_mt6877_msdc[] = {
	{
		.compatible = "mediatek,mt6877-msdc0sys",
		.data = clk_mt6877_msdc0_probe,
	}, {
		/* sentinel */
	}
};


static int clk_mt6877_msdc_probe(struct platform_device *pdev)
{
	int (*clk_probe)(struct platform_device *pd);
	int r;

	clk_probe = of_device_get_match_data(&pdev->dev);
	if (!clk_probe)
		return -EINVAL;

	r = clk_probe(pdev);
	if (r)
		dev_err(&pdev->dev,
			"could not register clock provider: %s: %d\n",
			pdev->name, r);

	return r;
}

static struct platform_driver clk_mt6877_msdc_drv = {
	.probe = clk_mt6877_msdc_probe,
	.driver = {
		.name = "clk-mt6877-msdc",
		.of_match_table = of_match_clk_mt6877_msdc,
	},
};

static int __init clk_mt6877_msdc_init(void)
{
	return platform_driver_register(&clk_mt6877_msdc_drv);
}
arch_initcall(clk_mt6877_msdc_init);