Commit | Line | Data |
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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> | |
46a88534 JH |
15 | #include <linux/pm_runtime.h> |
16 | ||
0d7dab92 SP |
17 | struct tegra_aconnect { |
18 | struct clk *ape_clk; | |
19 | struct clk *apb2ape_clk; | |
20 | }; | |
21 | ||
46a88534 JH |
22 | static int tegra_aconnect_probe(struct platform_device *pdev) |
23 | { | |
0d7dab92 | 24 | struct tegra_aconnect *aconnect; |
46a88534 JH |
25 | |
26 | if (!pdev->dev.of_node) | |
27 | return -EINVAL; | |
28 | ||
0d7dab92 SP |
29 | aconnect = devm_kzalloc(&pdev->dev, sizeof(struct tegra_aconnect), |
30 | GFP_KERNEL); | |
31 | if (!aconnect) | |
32 | return -ENOMEM; | |
46a88534 | 33 | |
0d7dab92 SP |
34 | aconnect->ape_clk = devm_clk_get(&pdev->dev, "ape"); |
35 | if (IS_ERR(aconnect->ape_clk)) { | |
36 | dev_err(&pdev->dev, "Can't retrieve ape clock\n"); | |
37 | return PTR_ERR(aconnect->ape_clk); | |
38 | } | |
46a88534 | 39 | |
0d7dab92 SP |
40 | aconnect->apb2ape_clk = devm_clk_get(&pdev->dev, "apb2ape"); |
41 | if (IS_ERR(aconnect->apb2ape_clk)) { | |
42 | dev_err(&pdev->dev, "Can't retrieve apb2ape clock\n"); | |
43 | return PTR_ERR(aconnect->apb2ape_clk); | |
44 | } | |
46a88534 | 45 | |
0d7dab92 | 46 | dev_set_drvdata(&pdev->dev, aconnect); |
46a88534 JH |
47 | pm_runtime_enable(&pdev->dev); |
48 | ||
49 | of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); | |
50 | ||
51 | dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n"); | |
52 | ||
53 | return 0; | |
46a88534 JH |
54 | } |
55 | ||
56 | static int tegra_aconnect_remove(struct platform_device *pdev) | |
57 | { | |
58 | pm_runtime_disable(&pdev->dev); | |
59 | ||
46a88534 JH |
60 | return 0; |
61 | } | |
62 | ||
63 | static int tegra_aconnect_runtime_resume(struct device *dev) | |
64 | { | |
0d7dab92 SP |
65 | struct tegra_aconnect *aconnect = dev_get_drvdata(dev); |
66 | int ret; | |
67 | ||
68 | ret = clk_prepare_enable(aconnect->ape_clk); | |
69 | if (ret) { | |
70 | dev_err(dev, "ape clk_enable failed: %d\n", ret); | |
71 | return ret; | |
72 | } | |
73 | ||
74 | ret = clk_prepare_enable(aconnect->apb2ape_clk); | |
75 | if (ret) { | |
76 | clk_disable_unprepare(aconnect->ape_clk); | |
77 | dev_err(dev, "apb2ape clk_enable failed: %d\n", ret); | |
78 | return ret; | |
79 | } | |
80 | ||
81 | return 0; | |
46a88534 JH |
82 | } |
83 | ||
84 | static int tegra_aconnect_runtime_suspend(struct device *dev) | |
85 | { | |
0d7dab92 SP |
86 | struct tegra_aconnect *aconnect = dev_get_drvdata(dev); |
87 | ||
88 | clk_disable_unprepare(aconnect->ape_clk); | |
89 | clk_disable_unprepare(aconnect->apb2ape_clk); | |
90 | ||
91 | return 0; | |
46a88534 JH |
92 | } |
93 | ||
94 | static const struct dev_pm_ops tegra_aconnect_pm_ops = { | |
95 | SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend, | |
96 | tegra_aconnect_runtime_resume, NULL) | |
1427736e SP |
97 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
98 | pm_runtime_force_resume) | |
46a88534 JH |
99 | }; |
100 | ||
101 | static const struct of_device_id tegra_aconnect_of_match[] = { | |
102 | { .compatible = "nvidia,tegra210-aconnect", }, | |
103 | { } | |
104 | }; | |
105 | MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match); | |
106 | ||
107 | static struct platform_driver tegra_aconnect_driver = { | |
108 | .probe = tegra_aconnect_probe, | |
109 | .remove = tegra_aconnect_remove, | |
110 | .driver = { | |
111 | .name = "tegra-aconnect", | |
112 | .of_match_table = tegra_aconnect_of_match, | |
113 | .pm = &tegra_aconnect_pm_ops, | |
114 | }, | |
115 | }; | |
116 | module_platform_driver(tegra_aconnect_driver); | |
117 | ||
118 | MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver"); | |
119 | MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>"); | |
120 | MODULE_LICENSE("GPL v2"); |