This source file includes following definitions.
- dwc3_of_simple_probe
- dwc3_of_simple_remove
- dwc3_of_simple_runtime_suspend
- dwc3_of_simple_runtime_resume
- dwc3_of_simple_suspend
- dwc3_of_simple_resume
1
2
3
4
5
6
7
8
9
10
11
12
13
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/platform_device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/clk.h>
20 #include <linux/of.h>
21 #include <linux/of_platform.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/reset.h>
24
25 struct dwc3_of_simple {
26 struct device *dev;
27 struct clk_bulk_data *clks;
28 int num_clocks;
29 struct reset_control *resets;
30 bool pulse_resets;
31 bool need_reset;
32 };
33
34 static int dwc3_of_simple_probe(struct platform_device *pdev)
35 {
36 struct dwc3_of_simple *simple;
37 struct device *dev = &pdev->dev;
38 struct device_node *np = dev->of_node;
39
40 int ret;
41 bool shared_resets = false;
42
43 simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
44 if (!simple)
45 return -ENOMEM;
46
47 platform_set_drvdata(pdev, simple);
48 simple->dev = dev;
49
50
51
52
53
54 if (of_device_is_compatible(np, "rockchip,rk3399-dwc3"))
55 simple->need_reset = true;
56
57 if (of_device_is_compatible(np, "amlogic,meson-axg-dwc3") ||
58 of_device_is_compatible(np, "amlogic,meson-gxl-dwc3")) {
59 shared_resets = true;
60 simple->pulse_resets = true;
61 }
62
63 simple->resets = of_reset_control_array_get(np, shared_resets, true,
64 true);
65 if (IS_ERR(simple->resets)) {
66 ret = PTR_ERR(simple->resets);
67 dev_err(dev, "failed to get device resets, err=%d\n", ret);
68 return ret;
69 }
70
71 if (simple->pulse_resets) {
72 ret = reset_control_reset(simple->resets);
73 if (ret)
74 goto err_resetc_put;
75 } else {
76 ret = reset_control_deassert(simple->resets);
77 if (ret)
78 goto err_resetc_put;
79 }
80
81 ret = clk_bulk_get_all(simple->dev, &simple->clks);
82 if (ret < 0)
83 goto err_resetc_assert;
84
85 simple->num_clocks = ret;
86 ret = clk_bulk_prepare_enable(simple->num_clocks, simple->clks);
87 if (ret)
88 goto err_resetc_assert;
89
90 ret = of_platform_populate(np, NULL, NULL, dev);
91 if (ret)
92 goto err_clk_put;
93
94 pm_runtime_set_active(dev);
95 pm_runtime_enable(dev);
96 pm_runtime_get_sync(dev);
97
98 return 0;
99
100 err_clk_put:
101 clk_bulk_disable_unprepare(simple->num_clocks, simple->clks);
102 clk_bulk_put_all(simple->num_clocks, simple->clks);
103
104 err_resetc_assert:
105 if (!simple->pulse_resets)
106 reset_control_assert(simple->resets);
107
108 err_resetc_put:
109 reset_control_put(simple->resets);
110 return ret;
111 }
112
113 static int dwc3_of_simple_remove(struct platform_device *pdev)
114 {
115 struct dwc3_of_simple *simple = platform_get_drvdata(pdev);
116 struct device *dev = &pdev->dev;
117
118 of_platform_depopulate(dev);
119
120 clk_bulk_disable_unprepare(simple->num_clocks, simple->clks);
121 clk_bulk_put_all(simple->num_clocks, simple->clks);
122 simple->num_clocks = 0;
123
124 if (!simple->pulse_resets)
125 reset_control_assert(simple->resets);
126
127 reset_control_put(simple->resets);
128
129 pm_runtime_disable(dev);
130 pm_runtime_put_noidle(dev);
131 pm_runtime_set_suspended(dev);
132
133 return 0;
134 }
135
136 static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
137 {
138 struct dwc3_of_simple *simple = dev_get_drvdata(dev);
139
140 clk_bulk_disable(simple->num_clocks, simple->clks);
141
142 return 0;
143 }
144
145 static int __maybe_unused dwc3_of_simple_runtime_resume(struct device *dev)
146 {
147 struct dwc3_of_simple *simple = dev_get_drvdata(dev);
148
149 return clk_bulk_enable(simple->num_clocks, simple->clks);
150 }
151
152 static int __maybe_unused dwc3_of_simple_suspend(struct device *dev)
153 {
154 struct dwc3_of_simple *simple = dev_get_drvdata(dev);
155
156 if (simple->need_reset)
157 reset_control_assert(simple->resets);
158
159 return 0;
160 }
161
162 static int __maybe_unused dwc3_of_simple_resume(struct device *dev)
163 {
164 struct dwc3_of_simple *simple = dev_get_drvdata(dev);
165
166 if (simple->need_reset)
167 reset_control_deassert(simple->resets);
168
169 return 0;
170 }
171
172 static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = {
173 SET_SYSTEM_SLEEP_PM_OPS(dwc3_of_simple_suspend, dwc3_of_simple_resume)
174 SET_RUNTIME_PM_OPS(dwc3_of_simple_runtime_suspend,
175 dwc3_of_simple_runtime_resume, NULL)
176 };
177
178 static const struct of_device_id of_dwc3_simple_match[] = {
179 { .compatible = "rockchip,rk3399-dwc3" },
180 { .compatible = "xlnx,zynqmp-dwc3" },
181 { .compatible = "cavium,octeon-7130-usb-uctl" },
182 { .compatible = "sprd,sc9860-dwc3" },
183 { .compatible = "amlogic,meson-axg-dwc3" },
184 { .compatible = "amlogic,meson-gxl-dwc3" },
185 { .compatible = "allwinner,sun50i-h6-dwc3" },
186 { }
187 };
188 MODULE_DEVICE_TABLE(of, of_dwc3_simple_match);
189
190 static struct platform_driver dwc3_of_simple_driver = {
191 .probe = dwc3_of_simple_probe,
192 .remove = dwc3_of_simple_remove,
193 .driver = {
194 .name = "dwc3-of-simple",
195 .of_match_table = of_dwc3_simple_match,
196 .pm = &dwc3_of_simple_dev_pm_ops,
197 },
198 };
199
200 module_platform_driver(dwc3_of_simple_driver);
201 MODULE_LICENSE("GPL v2");
202 MODULE_DESCRIPTION("DesignWare USB3 OF Simple Glue Layer");
203 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");