^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Tegra ACONNECT Bus Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2016, NVIDIA CORPORATION. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct tegra_aconnect {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct clk *ape_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct clk *apb2ape_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int tegra_aconnect_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct tegra_aconnect *aconnect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) if (!pdev->dev.of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) aconnect = devm_kzalloc(&pdev->dev, sizeof(struct tegra_aconnect),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (!aconnect)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) aconnect->ape_clk = devm_clk_get(&pdev->dev, "ape");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (IS_ERR(aconnect->ape_clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) dev_err(&pdev->dev, "Can't retrieve ape clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return PTR_ERR(aconnect->ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) aconnect->apb2ape_clk = devm_clk_get(&pdev->dev, "apb2ape");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (IS_ERR(aconnect->apb2ape_clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) dev_err(&pdev->dev, "Can't retrieve apb2ape clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return PTR_ERR(aconnect->apb2ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) dev_set_drvdata(&pdev->dev, aconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) pm_runtime_enable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int tegra_aconnect_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) pm_runtime_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static int tegra_aconnect_runtime_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct tegra_aconnect *aconnect = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ret = clk_prepare_enable(aconnect->ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) dev_err(dev, "ape clk_enable failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) ret = clk_prepare_enable(aconnect->apb2ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) clk_disable_unprepare(aconnect->ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) dev_err(dev, "apb2ape clk_enable failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static int tegra_aconnect_runtime_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct tegra_aconnect *aconnect = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) clk_disable_unprepare(aconnect->ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) clk_disable_unprepare(aconnect->apb2ape_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static const struct dev_pm_ops tegra_aconnect_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) tegra_aconnect_runtime_resume, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) pm_runtime_force_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static const struct of_device_id tegra_aconnect_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) { .compatible = "nvidia,tegra210-aconnect", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static struct platform_driver tegra_aconnect_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .probe = tegra_aconnect_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .remove = tegra_aconnect_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .name = "tegra-aconnect",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .of_match_table = tegra_aconnect_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .pm = &tegra_aconnect_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) module_platform_driver(tegra_aconnect_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags