1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2018 MediaTek Inc.
4  * Author: Wenzhen Yu <Wenzhen Yu@mediatek.com>
5  *	   Ryder Lee <ryder.lee@mediatek.com>
6  */
7 
8 #include <linux/clk-provider.h>
9 #include <linux/of.h>
10 #include <linux/of_address.h>
11 #include <linux/of_device.h>
12 #include <linux/platform_device.h>
13 
14 #include "clk-mtk.h"
15 #include "clk-gate.h"
16 
17 #include <dt-bindings/clock/mt7629-clk.h>
18 
19 #define GATE_PCIE(_id, _name, _parent, _shift) {	\
20 		.id = _id,				\
21 		.name = _name,				\
22 		.parent_name = _parent,			\
23 		.regs = &pcie_cg_regs,			\
24 		.shift = _shift,			\
25 		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
26 	}
27 
28 #define GATE_SSUSB(_id, _name, _parent, _shift) {	\
29 		.id = _id,				\
30 		.name = _name,				\
31 		.parent_name = _parent,			\
32 		.regs = &ssusb_cg_regs,			\
33 		.shift = _shift,			\
34 		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
35 	}
36 
37 static const struct mtk_gate_regs pcie_cg_regs = {
38 	.set_ofs = 0x30,
39 	.clr_ofs = 0x30,
40 	.sta_ofs = 0x30,
41 };
42 
43 static const struct mtk_gate_regs ssusb_cg_regs = {
44 	.set_ofs = 0x30,
45 	.clr_ofs = 0x30,
46 	.sta_ofs = 0x30,
47 };
48 
49 static const struct mtk_gate ssusb_clks[] = {
50 	GATE_SSUSB(CLK_SSUSB_U2_PHY_1P_EN, "ssusb_u2_phy_1p",
51 		   "to_u2_phy_1p", 0),
52 	GATE_SSUSB(CLK_SSUSB_U2_PHY_EN, "ssusb_u2_phy_en", "to_u2_phy", 1),
53 	GATE_SSUSB(CLK_SSUSB_REF_EN, "ssusb_ref_en", "to_usb3_ref", 5),
54 	GATE_SSUSB(CLK_SSUSB_SYS_EN, "ssusb_sys_en", "to_usb3_sys", 6),
55 	GATE_SSUSB(CLK_SSUSB_MCU_EN, "ssusb_mcu_en", "to_usb3_mcu", 7),
56 	GATE_SSUSB(CLK_SSUSB_DMA_EN, "ssusb_dma_en", "to_usb3_dma", 8),
57 };
58 
59 static const struct mtk_gate pcie_clks[] = {
60 	GATE_PCIE(CLK_PCIE_P1_AUX_EN, "pcie_p1_aux_en", "p1_1mhz", 12),
61 	GATE_PCIE(CLK_PCIE_P1_OBFF_EN, "pcie_p1_obff_en", "free_run_4mhz", 13),
62 	GATE_PCIE(CLK_PCIE_P1_AHB_EN, "pcie_p1_ahb_en", "from_top_ahb", 14),
63 	GATE_PCIE(CLK_PCIE_P1_AXI_EN, "pcie_p1_axi_en", "from_top_axi", 15),
64 	GATE_PCIE(CLK_PCIE_P1_MAC_EN, "pcie_p1_mac_en", "pcie1_mac_en", 16),
65 	GATE_PCIE(CLK_PCIE_P1_PIPE_EN, "pcie_p1_pipe_en", "pcie1_pipe_en", 17),
66 	GATE_PCIE(CLK_PCIE_P0_AUX_EN, "pcie_p0_aux_en", "p0_1mhz", 18),
67 	GATE_PCIE(CLK_PCIE_P0_OBFF_EN, "pcie_p0_obff_en", "free_run_4mhz", 19),
68 	GATE_PCIE(CLK_PCIE_P0_AHB_EN, "pcie_p0_ahb_en", "from_top_ahb", 20),
69 	GATE_PCIE(CLK_PCIE_P0_AXI_EN, "pcie_p0_axi_en", "from_top_axi", 21),
70 	GATE_PCIE(CLK_PCIE_P0_MAC_EN, "pcie_p0_mac_en", "pcie0_mac_en", 22),
71 	GATE_PCIE(CLK_PCIE_P0_PIPE_EN, "pcie_p0_pipe_en", "pcie0_pipe_en", 23),
72 };
73 
74 static u16 rst_ofs[] = { 0x34, };
75 
76 static const struct mtk_clk_rst_desc clk_rst_desc = {
77 	.version = MTK_RST_SIMPLE,
78 	.rst_bank_ofs = rst_ofs,
79 	.rst_bank_nr = ARRAY_SIZE(rst_ofs),
80 };
81 
82 static int clk_mt7629_ssusbsys_init(struct platform_device *pdev)
83 {
84 	struct clk_hw_onecell_data *clk_data;
85 	struct device_node *node = pdev->dev.of_node;
86 	int r;
87 
88 	clk_data = mtk_alloc_clk_data(CLK_SSUSB_NR_CLK);
89 
90 	mtk_clk_register_gates(node, ssusb_clks, ARRAY_SIZE(ssusb_clks),
91 			       clk_data);
92 
93 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
94 	if (r)
95 		dev_err(&pdev->dev,
96 			"could not register clock provider: %s: %d\n",
97 			pdev->name, r);
98 
99 	mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
100 
101 	return r;
102 }
103 
104 static int clk_mt7629_pciesys_init(struct platform_device *pdev)
105 {
106 	struct clk_hw_onecell_data *clk_data;
107 	struct device_node *node = pdev->dev.of_node;
108 	int r;
109 
110 	clk_data = mtk_alloc_clk_data(CLK_PCIE_NR_CLK);
111 
112 	mtk_clk_register_gates(node, pcie_clks, ARRAY_SIZE(pcie_clks),
113 			       clk_data);
114 
115 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
116 	if (r)
117 		dev_err(&pdev->dev,
118 			"could not register clock provider: %s: %d\n",
119 			pdev->name, r);
120 
121 	mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
122 
123 	return r;
124 }
125 
126 static const struct of_device_id of_match_clk_mt7629_hif[] = {
127 	{
128 		.compatible = "mediatek,mt7629-pciesys",
129 		.data = clk_mt7629_pciesys_init,
130 	}, {
131 		.compatible = "mediatek,mt7629-ssusbsys",
132 		.data = clk_mt7629_ssusbsys_init,
133 	}, {
134 		/* sentinel */
135 	}
136 };
137 
138 static int clk_mt7629_hif_probe(struct platform_device *pdev)
139 {
140 	int (*clk_init)(struct platform_device *);
141 	int r;
142 
143 	clk_init = of_device_get_match_data(&pdev->dev);
144 	if (!clk_init)
145 		return -EINVAL;
146 
147 	r = clk_init(pdev);
148 	if (r)
149 		dev_err(&pdev->dev,
150 			"could not register clock provider: %s: %d\n",
151 			pdev->name, r);
152 
153 	return r;
154 }
155 
156 static struct platform_driver clk_mt7629_hif_drv = {
157 	.probe = clk_mt7629_hif_probe,
158 	.driver = {
159 		.name = "clk-mt7629-hif",
160 		.of_match_table = of_match_clk_mt7629_hif,
161 	},
162 };
163 
164 builtin_platform_driver(clk_mt7629_hif_drv);
165