1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 MediaTek Inc.
4  * Author: Shunli Wang <shunli.wang@mediatek.com>
5  */
6 
7 #include <linux/clk-provider.h>
8 #include <linux/platform_device.h>
9 
10 #include "clk-mtk.h"
11 #include "clk-gate.h"
12 
13 #include <dt-bindings/clock/mt2701-clk.h>
14 
15 static const struct mtk_gate_regs hif_cg_regs = {
16 	.sta_ofs = 0x0030,
17 };
18 
19 #define GATE_HIF(_id, _name, _parent, _shift) {		\
20 		.id = _id,				\
21 		.name = _name,				\
22 		.parent_name = _parent,			\
23 		.regs = &hif_cg_regs,			\
24 		.shift = _shift,			\
25 		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
26 	}
27 
28 static const struct mtk_gate hif_clks[] = {
29 	GATE_HIF(CLK_HIFSYS_USB0PHY, "usb0_phy_clk", "ethpll_500m_ck", 21),
30 	GATE_HIF(CLK_HIFSYS_USB1PHY, "usb1_phy_clk", "ethpll_500m_ck", 22),
31 	GATE_HIF(CLK_HIFSYS_PCIE0, "pcie0_clk", "ethpll_500m_ck", 24),
32 	GATE_HIF(CLK_HIFSYS_PCIE1, "pcie1_clk", "ethpll_500m_ck", 25),
33 	GATE_HIF(CLK_HIFSYS_PCIE2, "pcie2_clk", "ethpll_500m_ck", 26),
34 };
35 
36 static u16 rst_ofs[] = { 0x34, };
37 
38 static const struct mtk_clk_rst_desc clk_rst_desc = {
39 	.version = MTK_RST_SIMPLE,
40 	.rst_bank_ofs = rst_ofs,
41 	.rst_bank_nr = ARRAY_SIZE(rst_ofs),
42 };
43 
44 static const struct of_device_id of_match_clk_mt2701_hif[] = {
45 	{ .compatible = "mediatek,mt2701-hifsys", },
46 	{}
47 };
48 
49 static int clk_mt2701_hif_probe(struct platform_device *pdev)
50 {
51 	struct clk_hw_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_hw_provider(node, of_clk_hw_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, &clk_rst_desc);
69 
70 	return 0;
71 }
72 
73 static 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 
81 builtin_platform_driver(clk_mt2701_hif_drv);
82