1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Hi3519 Clock Driver
4  *
5  * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
6  */
7 
8 #include <dt-bindings/clock/hi3519-clock.h>
9 #include <linux/clk-provider.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include "clk.h"
13 #include "reset.h"
14 
15 #define HI3519_INNER_CLK_OFFSET	64
16 #define HI3519_FIXED_24M	65
17 #define HI3519_FIXED_50M	66
18 #define HI3519_FIXED_75M	67
19 #define HI3519_FIXED_125M	68
20 #define HI3519_FIXED_150M	69
21 #define HI3519_FIXED_200M	70
22 #define HI3519_FIXED_250M	71
23 #define HI3519_FIXED_300M	72
24 #define HI3519_FIXED_400M	73
25 #define HI3519_FMC_MUX		74
26 
27 #define HI3519_NR_CLKS		128
28 
29 struct hi3519_crg_data {
30 	struct hisi_clock_data *clk_data;
31 	struct hisi_reset_controller *rstc;
32 };
33 
34 static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
35 	{ HI3519_FIXED_24M, "24m", NULL, 0, 24000000, },
36 	{ HI3519_FIXED_50M, "50m", NULL, 0, 50000000, },
37 	{ HI3519_FIXED_75M, "75m", NULL, 0, 75000000, },
38 	{ HI3519_FIXED_125M, "125m", NULL, 0, 125000000, },
39 	{ HI3519_FIXED_150M, "150m", NULL, 0, 150000000, },
40 	{ HI3519_FIXED_200M, "200m", NULL, 0, 200000000, },
41 	{ HI3519_FIXED_250M, "250m", NULL, 0, 250000000, },
42 	{ HI3519_FIXED_300M, "300m", NULL, 0, 300000000, },
43 	{ HI3519_FIXED_400M, "400m", NULL, 0, 400000000, },
44 };
45 
46 static const char *const fmc_mux_p[] = {
47 		"24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
48 static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
49 
50 static const struct hisi_mux_clock hi3519_mux_clks[] = {
51 	{ HI3519_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p),
52 		CLK_SET_RATE_PARENT, 0xc0, 2, 3, 0, fmc_mux_table, },
53 };
54 
55 static const struct hisi_gate_clock hi3519_gate_clks[] = {
56 	{ HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
57 		CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
58 	{ HI3519_UART0_CLK, "clk_uart0", "24m",
59 		CLK_SET_RATE_PARENT, 0xe4, 20, 0, },
60 	{ HI3519_UART1_CLK, "clk_uart1", "24m",
61 		CLK_SET_RATE_PARENT, 0xe4, 21, 0, },
62 	{ HI3519_UART2_CLK, "clk_uart2", "24m",
63 		CLK_SET_RATE_PARENT, 0xe4, 22, 0, },
64 	{ HI3519_UART3_CLK, "clk_uart3", "24m",
65 		CLK_SET_RATE_PARENT, 0xe4, 23, 0, },
66 	{ HI3519_UART4_CLK, "clk_uart4", "24m",
67 		CLK_SET_RATE_PARENT, 0xe4, 24, 0, },
68 	{ HI3519_SPI0_CLK, "clk_spi0", "50m",
69 		CLK_SET_RATE_PARENT, 0xe4, 16, 0, },
70 	{ HI3519_SPI1_CLK, "clk_spi1", "50m",
71 		CLK_SET_RATE_PARENT, 0xe4, 17, 0, },
72 	{ HI3519_SPI2_CLK, "clk_spi2", "50m",
73 		CLK_SET_RATE_PARENT, 0xe4, 18, 0, },
74 };
75 
hi3519_clk_register(struct platform_device * pdev)76 static struct hisi_clock_data *hi3519_clk_register(struct platform_device *pdev)
77 {
78 	struct hisi_clock_data *clk_data;
79 	int ret;
80 
81 	clk_data = hisi_clk_alloc(pdev, HI3519_NR_CLKS);
82 	if (!clk_data)
83 		return ERR_PTR(-ENOMEM);
84 
85 	ret = hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
86 				     ARRAY_SIZE(hi3519_fixed_rate_clks),
87 				     clk_data);
88 	if (ret)
89 		return ERR_PTR(ret);
90 
91 	ret = hisi_clk_register_mux(hi3519_mux_clks,
92 				ARRAY_SIZE(hi3519_mux_clks),
93 				clk_data);
94 	if (ret)
95 		goto unregister_fixed_rate;
96 
97 	ret = hisi_clk_register_gate(hi3519_gate_clks,
98 				ARRAY_SIZE(hi3519_gate_clks),
99 				clk_data);
100 	if (ret)
101 		goto unregister_mux;
102 
103 	ret = of_clk_add_provider(pdev->dev.of_node,
104 			of_clk_src_onecell_get, &clk_data->clk_data);
105 	if (ret)
106 		goto unregister_gate;
107 
108 	return clk_data;
109 
110 unregister_fixed_rate:
111 	hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
112 				ARRAY_SIZE(hi3519_fixed_rate_clks),
113 				clk_data);
114 
115 unregister_mux:
116 	hisi_clk_unregister_mux(hi3519_mux_clks,
117 				ARRAY_SIZE(hi3519_mux_clks),
118 				clk_data);
119 unregister_gate:
120 	hisi_clk_unregister_gate(hi3519_gate_clks,
121 				ARRAY_SIZE(hi3519_gate_clks),
122 				clk_data);
123 	return ERR_PTR(ret);
124 }
125 
hi3519_clk_unregister(struct platform_device * pdev)126 static void hi3519_clk_unregister(struct platform_device *pdev)
127 {
128 	struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
129 
130 	of_clk_del_provider(pdev->dev.of_node);
131 
132 	hisi_clk_unregister_gate(hi3519_gate_clks,
133 				ARRAY_SIZE(hi3519_gate_clks),
134 				crg->clk_data);
135 	hisi_clk_unregister_mux(hi3519_mux_clks,
136 				ARRAY_SIZE(hi3519_mux_clks),
137 				crg->clk_data);
138 	hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
139 				ARRAY_SIZE(hi3519_fixed_rate_clks),
140 				crg->clk_data);
141 }
142 
hi3519_clk_probe(struct platform_device * pdev)143 static int hi3519_clk_probe(struct platform_device *pdev)
144 {
145 	struct hi3519_crg_data *crg;
146 
147 	crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
148 	if (!crg)
149 		return -ENOMEM;
150 
151 	crg->rstc = hisi_reset_init(pdev);
152 	if (!crg->rstc)
153 		return -ENOMEM;
154 
155 	crg->clk_data = hi3519_clk_register(pdev);
156 	if (IS_ERR(crg->clk_data)) {
157 		hisi_reset_exit(crg->rstc);
158 		return PTR_ERR(crg->clk_data);
159 	}
160 
161 	platform_set_drvdata(pdev, crg);
162 	return 0;
163 }
164 
hi3519_clk_remove(struct platform_device * pdev)165 static void hi3519_clk_remove(struct platform_device *pdev)
166 {
167 	struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
168 
169 	hisi_reset_exit(crg->rstc);
170 	hi3519_clk_unregister(pdev);
171 }
172 
173 
174 static const struct of_device_id hi3519_clk_match_table[] = {
175 	{ .compatible = "hisilicon,hi3519-crg" },
176 	{ }
177 };
178 MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
179 
180 static struct platform_driver hi3519_clk_driver = {
181 	.probe          = hi3519_clk_probe,
182 	.remove_new	= hi3519_clk_remove,
183 	.driver         = {
184 		.name   = "hi3519-clk",
185 		.of_match_table = hi3519_clk_match_table,
186 	},
187 };
188 
hi3519_clk_init(void)189 static int __init hi3519_clk_init(void)
190 {
191 	return platform_driver_register(&hi3519_clk_driver);
192 }
193 core_initcall(hi3519_clk_init);
194 
hi3519_clk_exit(void)195 static void __exit hi3519_clk_exit(void)
196 {
197 	platform_driver_unregister(&hi3519_clk_driver);
198 }
199 module_exit(hi3519_clk_exit);
200 
201 MODULE_LICENSE("GPL v2");
202 MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");
203