1/*
 2 * Copyright (c) 2014 MediaTek Inc.
 3 * Author: Shunli Wang <shunli.wang@mediatek.com>
 4 *
 5 * This program is free software; you can redistribute it and/or modify
 6 * it under the terms of the GNU General Public License version 2 as
 7 * published by the Free Software Foundation.
 8 *
 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 */
14
15#include <linux/clk-provider.h>
16#include <linux/platform_device.h>
17
18#include "clk-mtk.h"
19#include "clk-gate.h"
20
21#include <dt-bindings/clock/mt2701-clk.h>
22
23static const struct mtk_gate_regs hif_cg_regs = {
24	.sta_ofs = 0x0030,
25};
26
27#define GATE_HIF(_id, _name, _parent, _shift) {		\
28		.id = _id,				\
29		.name = _name,				\
30		.parent_name = _parent,			\
31		.regs = &hif_cg_regs,			\
32		.shift = _shift,			\
33		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
34	}
35
36static const struct mtk_gate hif_clks[] = {
37	GATE_HIF(CLK_HIFSYS_USB0PHY, "usb0_phy_clk", "ethpll_500m_ck", 21),
38	GATE_HIF(CLK_HIFSYS_USB1PHY, "usb1_phy_clk", "ethpll_500m_ck", 22),
39	GATE_HIF(CLK_HIFSYS_PCIE0, "pcie0_clk", "ethpll_500m_ck", 24),
40	GATE_HIF(CLK_HIFSYS_PCIE1, "pcie1_clk", "ethpll_500m_ck", 25),
41	GATE_HIF(CLK_HIFSYS_PCIE2, "pcie2_clk", "ethpll_500m_ck", 26),
42};
43
44static const struct of_device_id of_match_clk_mt2701_hif[] = {
45	{ .compatible = "mediatek,mt2701-hifsys", },
46	{}
47};
48
49static int clk_mt2701_hif_probe(struct platform_device *pdev)
50{
51	struct clk_onecell_data *clk_data;
52	int r;
53	struct device_node *node = pdev->dev.of_node;
54
55	clk_data = mtk_alloc_clk_data(CLK_HIFSYS_NR);
56
57	mtk_clk_register_gates(node, hif_clks, ARRAY_SIZE(hif_clks),
58						clk_data);
59
60	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
61	if (r) {
62		dev_err(&pdev->dev,
63			"could not register clock provider: %s: %d\n",
64			pdev->name, r);
65		return r;
66	}
67
68	mtk_register_reset_controller(node, 1, 0x34);
69
70	return 0;
71}
72
73static struct platform_driver clk_mt2701_hif_drv = {
74	.probe = clk_mt2701_hif_probe,
75	.driver = {
76		.name = "clk-mt2701-hif",
77		.of_match_table = of_match_clk_mt2701_hif,
78	},
79};
80
81builtin_platform_driver(clk_mt2701_hif_drv);