summaryrefslogtreecommitdiffstats
path: root/drivers/clk/mediatek/clk-mt7629-eth.c
blob: eab838af6d41346a6f8cfe403b8177a80378b326 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2018 MediaTek Inc.
 * Author: Wenzhen Yu <Wenzhen Yu@mediatek.com>
 *	   Ryder Lee <ryder.lee@mediatek.com>
 */

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

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

#include <dt-bindings/clock/mt7629-clk.h>

#define GATE_ETH(_id, _name, _parent, _shift)			\
	GATE_MTK(_id, _name, _parent, &eth_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)

static const struct mtk_gate_regs eth_cg_regs = {
	.set_ofs = 0x30,
	.clr_ofs = 0x30,
	.sta_ofs = 0x30,
};

static const struct mtk_gate eth_clks[] = {
	GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "eth2pll", 6),
	GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
	GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
	GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
	GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 16),
};

static const struct mtk_gate_regs sgmii_cg_regs = {
	.set_ofs = 0xE4,
	.clr_ofs = 0xE4,
	.sta_ofs = 0xE4,
};

#define GATE_SGMII(_id, _name, _parent, _shift)			\
	GATE_MTK(_id, _name, _parent, &sgmii_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)

static const struct mtk_gate sgmii_clks[2][4] = {
	{
		GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en",
			   "ssusb_tx250m", 2),
		GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en",
			   "ssusb_eq_rx250m", 3),
		GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
			   "ssusb_cdr_ref", 4),
		GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
			   "ssusb_cdr_fb", 5),
	}, {
		GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en1",
			   "ssusb_tx250m", 2),
		GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en1",
			   "ssusb_eq_rx250m", 3),
		GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref1",
			   "ssusb_cdr_ref", 4),
		GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb1",
			   "ssusb_cdr_fb", 5),
	}
};

static u16 rst_ofs[] = { 0x34, };

static const struct mtk_clk_rst_desc clk_rst_desc = {
	.version = MTK_RST_SIMPLE,
	.rst_bank_ofs = rst_ofs,
	.rst_bank_nr = ARRAY_SIZE(rst_ofs),
};

static int clk_mt7629_ethsys_init(struct platform_device *pdev)
{
	struct clk_hw_onecell_data *clk_data;
	struct device_node *node = pdev->dev.of_node;
	int r;

	clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
	if (!clk_data)
		return -ENOMEM;

	mtk_clk_register_gates(&pdev->dev, node, eth_clks,
			       CLK_ETH_NR_CLK, clk_data);

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

	mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);

	return r;
}

static int clk_mt7629_sgmiisys_init(struct platform_device *pdev)
{
	struct clk_hw_onecell_data *clk_data;
	struct device_node *node = pdev->dev.of_node;
	static int id;
	int r;

	clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
	if (!clk_data)
		return -ENOMEM;

	mtk_clk_register_gates(&pdev->dev, node, sgmii_clks[id++],
			       CLK_SGMII_NR_CLK, clk_data);

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

	return r;
}

static const struct of_device_id of_match_clk_mt7629_eth[] = {
	{
		.compatible = "mediatek,mt7629-ethsys",
		.data = clk_mt7629_ethsys_init,
	}, {
		.compatible = "mediatek,mt7629-sgmiisys",
		.data = clk_mt7629_sgmiisys_init,
	}, {
		/* sentinel */
	}
};

static int clk_mt7629_eth_probe(struct platform_device *pdev)
{
	int (*clk_init)(struct platform_device *);
	int r;

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

	r = clk_init(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_mt7629_eth_drv = {
	.probe = clk_mt7629_eth_probe,
	.driver = {
		.name = "clk-mt7629-eth",
		.of_match_table = of_match_clk_mt7629_eth,
	},
};

builtin_platform_driver(clk_mt7629_eth_drv);