Commit | Line | Data |
---|---|---|
46a88534 JH |
1 | /* |
2 | * Tegra ACONNECT Bus Driver | |
3 | * | |
4 | * Copyright (C) 2016, NVIDIA CORPORATION. All rights reserved. | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
9 | */ | |
10 | ||
11 | #include <linux/clk.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/of_platform.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/pm_clock.h> | |
16 | #include <linux/pm_runtime.h> | |
17 | ||
46a88534 JH |
18 | static int tegra_aconnect_probe(struct platform_device *pdev) |
19 | { | |
20 | int ret; | |
21 | ||
22 | if (!pdev->dev.of_node) | |
23 | return -EINVAL; | |
24 | ||
25 | ret = pm_clk_create(&pdev->dev); | |
26 | if (ret) | |
27 | return ret; | |
28 | ||
3a99cb09 | 29 | ret = of_pm_clk_add_clk(&pdev->dev, "ape"); |
46a88534 JH |
30 | if (ret) |
31 | goto clk_destroy; | |
32 | ||
3a99cb09 | 33 | ret = of_pm_clk_add_clk(&pdev->dev, "apb2ape"); |
46a88534 JH |
34 | if (ret) |
35 | goto clk_destroy; | |
36 | ||
37 | pm_runtime_enable(&pdev->dev); | |
38 | ||
39 | of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); | |
40 | ||
41 | dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n"); | |
42 | ||
43 | return 0; | |
44 | ||
45 | clk_destroy: | |
46 | pm_clk_destroy(&pdev->dev); | |
47 | ||
48 | return ret; | |
49 | } | |
50 | ||
51 | static int tegra_aconnect_remove(struct platform_device *pdev) | |
52 | { | |
53 | pm_runtime_disable(&pdev->dev); | |
54 | ||
55 | pm_clk_destroy(&pdev->dev); | |
56 | ||
57 | return 0; | |
58 | } | |
59 | ||
60 | static int tegra_aconnect_runtime_resume(struct device *dev) | |
61 | { | |
62 | return pm_clk_resume(dev); | |
63 | } | |
64 | ||
65 | static int tegra_aconnect_runtime_suspend(struct device *dev) | |
66 | { | |
67 | return pm_clk_suspend(dev); | |
68 | } | |
69 | ||
70 | static const struct dev_pm_ops tegra_aconnect_pm_ops = { | |
71 | SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend, | |
72 | tegra_aconnect_runtime_resume, NULL) | |
73 | }; | |
74 | ||
75 | static const struct of_device_id tegra_aconnect_of_match[] = { | |
76 | { .compatible = "nvidia,tegra210-aconnect", }, | |
77 | { } | |
78 | }; | |
79 | MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match); | |
80 | ||
81 | static struct platform_driver tegra_aconnect_driver = { | |
82 | .probe = tegra_aconnect_probe, | |
83 | .remove = tegra_aconnect_remove, | |
84 | .driver = { | |
85 | .name = "tegra-aconnect", | |
86 | .of_match_table = tegra_aconnect_of_match, | |
87 | .pm = &tegra_aconnect_pm_ops, | |
88 | }, | |
89 | }; | |
90 | module_platform_driver(tegra_aconnect_driver); | |
91 | ||
92 | MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver"); | |
93 | MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>"); | |
94 | MODULE_LICENSE("GPL v2"); |