summaryrefslogtreecommitdiffstats
path: root/drivers/clk/hisilicon/clk-hi3519.c
blob: 51b173ef1ddad864b34ba04ba37b608c74f6c609 (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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
/*
 * Hi3519 Clock Driver
 *
 * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <dt-bindings/clock/hi3519-clock.h>
#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "clk.h"
#include "reset.h"

#define HI3519_INNER_CLK_OFFSET	64
#define HI3519_FIXED_24M	65
#define HI3519_FIXED_50M	66
#define HI3519_FIXED_75M	67
#define HI3519_FIXED_125M	68
#define HI3519_FIXED_150M	69
#define HI3519_FIXED_200M	70
#define HI3519_FIXED_250M	71
#define HI3519_FIXED_300M	72
#define HI3519_FIXED_400M	73
#define HI3519_FMC_MUX		74

#define HI3519_NR_CLKS		128

struct hi3519_crg_data {
	struct hisi_clock_data *clk_data;
	struct hisi_reset_controller *rstc;
};

static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
	{ HI3519_FIXED_24M, "24m", NULL, 0, 24000000, },
	{ HI3519_FIXED_50M, "50m", NULL, 0, 50000000, },
	{ HI3519_FIXED_75M, "75m", NULL, 0, 75000000, },
	{ HI3519_FIXED_125M, "125m", NULL, 0, 125000000, },
	{ HI3519_FIXED_150M, "150m", NULL, 0, 150000000, },
	{ HI3519_FIXED_200M, "200m", NULL, 0, 200000000, },
	{ HI3519_FIXED_250M, "250m", NULL, 0, 250000000, },
	{ HI3519_FIXED_300M, "300m", NULL, 0, 300000000, },
	{ HI3519_FIXED_400M, "400m", NULL, 0, 400000000, },
};

static const char *const fmc_mux_p[] = {
		"24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};

static const struct hisi_mux_clock hi3519_mux_clks[] = {
	{ HI3519_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p),
		CLK_SET_RATE_PARENT, 0xc0, 2, 3, 0, fmc_mux_table, },
};

static const struct hisi_gate_clock hi3519_gate_clks[] = {
	{ HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
		CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
	{ HI3519_UART0_CLK, "clk_uart0", "24m",
		CLK_SET_RATE_PARENT, 0xe4, 20, 0, },
	{ HI3519_UART1_CLK, "clk_uart1", "24m",
		CLK_SET_RATE_PARENT, 0xe4, 21, 0, },
	{ HI3519_UART2_CLK, "clk_uart2", "24m",
		CLK_SET_RATE_PARENT, 0xe4, 22, 0, },
	{ HI3519_UART3_CLK, "clk_uart3", "24m",
		CLK_SET_RATE_PARENT, 0xe4, 23, 0, },
	{ HI3519_UART4_CLK, "clk_uart4", "24m",
		CLK_SET_RATE_PARENT, 0xe4, 24, 0, },
	{ HI3519_SPI0_CLK, "clk_spi0", "50m",
		CLK_SET_RATE_PARENT, 0xe4, 16, 0, },
	{ HI3519_SPI1_CLK, "clk_spi1", "50m",
		CLK_SET_RATE_PARENT, 0xe4, 17, 0, },
	{ HI3519_SPI2_CLK, "clk_spi2", "50m",
		CLK_SET_RATE_PARENT, 0xe4, 18, 0, },
};

static struct hisi_clock_data *hi3519_clk_register(struct platform_device *pdev)
{
	struct hisi_clock_data *clk_data;
	int ret;

	clk_data = hisi_clk_alloc(pdev, HI3519_NR_CLKS);
	if (!clk_data)
		return ERR_PTR(-ENOMEM);

	ret = hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
				     ARRAY_SIZE(hi3519_fixed_rate_clks),
				     clk_data);
	if (ret)
		return ERR_PTR(ret);

	ret = hisi_clk_register_mux(hi3519_mux_clks,
				ARRAY_SIZE(hi3519_mux_clks),
				clk_data);
	if (ret)
		goto unregister_fixed_rate;

	ret = hisi_clk_register_gate(hi3519_gate_clks,
				ARRAY_SIZE(hi3519_gate_clks),
				clk_data);
	if (ret)
		goto unregister_mux;

	ret = of_clk_add_provider(pdev->dev.of_node,
			of_clk_src_onecell_get, &clk_data->clk_data);
	if (ret)
		goto unregister_gate;

	return clk_data;

unregister_fixed_rate:
	hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
				ARRAY_SIZE(hi3519_fixed_rate_clks),
				clk_data);

unregister_mux:
	hisi_clk_unregister_mux(hi3519_mux_clks,
				ARRAY_SIZE(hi3519_mux_clks),
				clk_data);
unregister_gate:
	hisi_clk_unregister_gate(hi3519_gate_clks,
				ARRAY_SIZE(hi3519_gate_clks),
				clk_data);
	return ERR_PTR(ret);
}

static void hi3519_clk_unregister(struct platform_device *pdev)
{
	struct hi3519_crg_data *crg = platform_get_drvdata(pdev);

	of_clk_del_provider(pdev->dev.of_node);

	hisi_clk_unregister_gate(hi3519_gate_clks,
				ARRAY_SIZE(hi3519_mux_clks),
				crg->clk_data);
	hisi_clk_unregister_mux(hi3519_mux_clks,
				ARRAY_SIZE(hi3519_mux_clks),
				crg->clk_data);
	hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
				ARRAY_SIZE(hi3519_fixed_rate_clks),
				crg->clk_data);
}

static int hi3519_clk_probe(struct platform_device *pdev)
{
	struct hi3519_crg_data *crg;

	crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
	if (!crg)
		return -ENOMEM;

	crg->rstc = hisi_reset_init(pdev);
	if (!crg->rstc)
		return -ENOMEM;

	crg->clk_data = hi3519_clk_register(pdev);
	if (IS_ERR(crg->clk_data)) {
		hisi_reset_exit(crg->rstc);
		return PTR_ERR(crg->clk_data);
	}

	platform_set_drvdata(pdev, crg);
	return 0;
}

static int hi3519_clk_remove(struct platform_device *pdev)
{
	struct hi3519_crg_data *crg = platform_get_drvdata(pdev);

	hisi_reset_exit(crg->rstc);
	hi3519_clk_unregister(pdev);
	return 0;
}


static const struct of_device_id hi3519_clk_match_table[] = {
	{ .compatible = "hisilicon,hi3519-crg" },
	{ }
};
MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);

static struct platform_driver hi3519_clk_driver = {
	.probe          = hi3519_clk_probe,
	.remove		= hi3519_clk_remove,
	.driver         = {
		.name   = "hi3519-clk",
		.of_match_table = hi3519_clk_match_table,
	},
};

static int __init hi3519_clk_init(void)
{
	return platform_driver_register(&hi3519_clk_driver);
}
core_initcall(hi3519_clk_init);

static void __exit hi3519_clk_exit(void)
{
	platform_driver_unregister(&hi3519_clk_driver);
}
module_exit(hi3519_clk_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");