Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / bus / tegra-aconnect.c
blob90e3b0a108161ec72103d6361224b575ea518366
1 /*
2 * Tegra ACONNECT Bus Driver
4 * Copyright (C) 2016, NVIDIA CORPORATION. All rights reserved.
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 */
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_runtime.h>
17 struct tegra_aconnect {
18 struct clk *ape_clk;
19 struct clk *apb2ape_clk;
22 static int tegra_aconnect_probe(struct platform_device *pdev)
24 struct tegra_aconnect *aconnect;
26 if (!pdev->dev.of_node)
27 return -EINVAL;
29 aconnect = devm_kzalloc(&pdev->dev, sizeof(struct tegra_aconnect),
30 GFP_KERNEL);
31 if (!aconnect)
32 return -ENOMEM;
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);
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);
46 dev_set_drvdata(&pdev->dev, aconnect);
47 pm_runtime_enable(&pdev->dev);
49 of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
51 dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n");
53 return 0;
56 static void tegra_aconnect_remove(struct platform_device *pdev)
58 pm_runtime_disable(&pdev->dev);
61 static int tegra_aconnect_runtime_resume(struct device *dev)
63 struct tegra_aconnect *aconnect = dev_get_drvdata(dev);
64 int ret;
66 ret = clk_prepare_enable(aconnect->ape_clk);
67 if (ret) {
68 dev_err(dev, "ape clk_enable failed: %d\n", ret);
69 return ret;
72 ret = clk_prepare_enable(aconnect->apb2ape_clk);
73 if (ret) {
74 clk_disable_unprepare(aconnect->ape_clk);
75 dev_err(dev, "apb2ape clk_enable failed: %d\n", ret);
76 return ret;
79 return 0;
82 static int tegra_aconnect_runtime_suspend(struct device *dev)
84 struct tegra_aconnect *aconnect = dev_get_drvdata(dev);
86 clk_disable_unprepare(aconnect->ape_clk);
87 clk_disable_unprepare(aconnect->apb2ape_clk);
89 return 0;
92 static const struct dev_pm_ops tegra_aconnect_pm_ops = {
93 SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend,
94 tegra_aconnect_runtime_resume, NULL)
95 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
96 pm_runtime_force_resume)
99 static const struct of_device_id tegra_aconnect_of_match[] = {
100 { .compatible = "nvidia,tegra210-aconnect", },
103 MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);
105 static struct platform_driver tegra_aconnect_driver = {
106 .probe = tegra_aconnect_probe,
107 .remove = tegra_aconnect_remove,
108 .driver = {
109 .name = "tegra-aconnect",
110 .of_match_table = tegra_aconnect_of_match,
111 .pm = &tegra_aconnect_pm_ops,
114 module_platform_driver(tegra_aconnect_driver);
116 MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver");
117 MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>");
118 MODULE_LICENSE("GPL v2");