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_ETH(_id, _name, _parent, _shift) { \
20 .id = _id, \
21 .name = _name, \
22 .parent_name = _parent, \
23 .regs = ð_cg_regs, \
24 .shift = _shift, \
25 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
26 }
27
28 static const struct mtk_gate_regs eth_cg_regs = {
29 .set_ofs = 0x30,
30 .clr_ofs = 0x30,
31 .sta_ofs = 0x30,
32 };
33
34 static const struct mtk_gate eth_clks[] = {
35 GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "eth2pll", 6),
36 GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
37 GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
38 GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
39 GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 16),
40 };
41
42 static const struct mtk_gate_regs sgmii_cg_regs = {
43 .set_ofs = 0xE4,
44 .clr_ofs = 0xE4,
45 .sta_ofs = 0xE4,
46 };
47
48 #define GATE_SGMII(_id, _name, _parent, _shift) { \
49 .id = _id, \
50 .name = _name, \
51 .parent_name = _parent, \
52 .regs = &sgmii_cg_regs, \
53 .shift = _shift, \
54 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
55 }
56
57 static const struct mtk_gate sgmii_clks[2][4] = {
58 {
59 GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en",
60 "ssusb_tx250m", 2),
61 GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en",
62 "ssusb_eq_rx250m", 3),
63 GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
64 "ssusb_cdr_ref", 4),
65 GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
66 "ssusb_cdr_fb", 5),
67 }, {
68 GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en1",
69 "ssusb_tx250m", 2),
70 GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en1",
71 "ssusb_eq_rx250m", 3),
72 GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref1",
73 "ssusb_cdr_ref", 4),
74 GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb1",
75 "ssusb_cdr_fb", 5),
76 }
77 };
78
79 static u16 rst_ofs[] = { 0x34, };
80
81 static const struct mtk_clk_rst_desc clk_rst_desc = {
82 .version = MTK_RST_SIMPLE,
83 .rst_bank_ofs = rst_ofs,
84 .rst_bank_nr = ARRAY_SIZE(rst_ofs),
85 };
86
clk_mt7629_ethsys_init(struct platform_device * pdev)87 static int clk_mt7629_ethsys_init(struct platform_device *pdev)
88 {
89 struct clk_hw_onecell_data *clk_data;
90 struct device_node *node = pdev->dev.of_node;
91 int r;
92
93 clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
94
95 mtk_clk_register_gates(node, eth_clks, CLK_ETH_NR_CLK, clk_data);
96
97 r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
98 if (r)
99 dev_err(&pdev->dev,
100 "could not register clock provider: %s: %d\n",
101 pdev->name, r);
102
103 mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
104
105 return r;
106 }
107
clk_mt7629_sgmiisys_init(struct platform_device * pdev)108 static int clk_mt7629_sgmiisys_init(struct platform_device *pdev)
109 {
110 struct clk_hw_onecell_data *clk_data;
111 struct device_node *node = pdev->dev.of_node;
112 static int id;
113 int r;
114
115 clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
116
117 mtk_clk_register_gates(node, sgmii_clks[id++], CLK_SGMII_NR_CLK,
118 clk_data);
119
120 r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
121 if (r)
122 dev_err(&pdev->dev,
123 "could not register clock provider: %s: %d\n",
124 pdev->name, r);
125
126 return r;
127 }
128
129 static const struct of_device_id of_match_clk_mt7629_eth[] = {
130 {
131 .compatible = "mediatek,mt7629-ethsys",
132 .data = clk_mt7629_ethsys_init,
133 }, {
134 .compatible = "mediatek,mt7629-sgmiisys",
135 .data = clk_mt7629_sgmiisys_init,
136 }, {
137 /* sentinel */
138 }
139 };
140
clk_mt7629_eth_probe(struct platform_device * pdev)141 static int clk_mt7629_eth_probe(struct platform_device *pdev)
142 {
143 int (*clk_init)(struct platform_device *);
144 int r;
145
146 clk_init = of_device_get_match_data(&pdev->dev);
147 if (!clk_init)
148 return -EINVAL;
149
150 r = clk_init(pdev);
151 if (r)
152 dev_err(&pdev->dev,
153 "could not register clock provider: %s: %d\n",
154 pdev->name, r);
155
156 return r;
157 }
158
159 static struct platform_driver clk_mt7629_eth_drv = {
160 .probe = clk_mt7629_eth_probe,
161 .driver = {
162 .name = "clk-mt7629-eth",
163 .of_match_table = of_match_clk_mt7629_eth,
164 },
165 };
166
167 builtin_platform_driver(clk_mt7629_eth_drv);
168
