mirror of
https://github.com/torvalds/linux
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f54ba5ef85
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Link: https://lore.kernel.org/r/20231109202830.4124591-9-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* Tegra ACONNECT Bus Driver
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*
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* Copyright (C) 2016, NVIDIA CORPORATION. All rights reserved.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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struct tegra_aconnect {
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struct clk *ape_clk;
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struct clk *apb2ape_clk;
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};
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static int tegra_aconnect_probe(struct platform_device *pdev)
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{
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struct tegra_aconnect *aconnect;
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if (!pdev->dev.of_node)
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return -EINVAL;
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aconnect = devm_kzalloc(&pdev->dev, sizeof(struct tegra_aconnect),
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GFP_KERNEL);
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if (!aconnect)
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return -ENOMEM;
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aconnect->ape_clk = devm_clk_get(&pdev->dev, "ape");
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if (IS_ERR(aconnect->ape_clk)) {
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dev_err(&pdev->dev, "Can't retrieve ape clock\n");
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return PTR_ERR(aconnect->ape_clk);
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}
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aconnect->apb2ape_clk = devm_clk_get(&pdev->dev, "apb2ape");
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if (IS_ERR(aconnect->apb2ape_clk)) {
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dev_err(&pdev->dev, "Can't retrieve apb2ape clock\n");
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return PTR_ERR(aconnect->apb2ape_clk);
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}
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dev_set_drvdata(&pdev->dev, aconnect);
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pm_runtime_enable(&pdev->dev);
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of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
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dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n");
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return 0;
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}
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static void tegra_aconnect_remove(struct platform_device *pdev)
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{
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pm_runtime_disable(&pdev->dev);
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}
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static int tegra_aconnect_runtime_resume(struct device *dev)
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{
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struct tegra_aconnect *aconnect = dev_get_drvdata(dev);
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int ret;
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ret = clk_prepare_enable(aconnect->ape_clk);
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if (ret) {
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dev_err(dev, "ape clk_enable failed: %d\n", ret);
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return ret;
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}
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ret = clk_prepare_enable(aconnect->apb2ape_clk);
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if (ret) {
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clk_disable_unprepare(aconnect->ape_clk);
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dev_err(dev, "apb2ape clk_enable failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int tegra_aconnect_runtime_suspend(struct device *dev)
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{
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struct tegra_aconnect *aconnect = dev_get_drvdata(dev);
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clk_disable_unprepare(aconnect->ape_clk);
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clk_disable_unprepare(aconnect->apb2ape_clk);
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return 0;
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}
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static const struct dev_pm_ops tegra_aconnect_pm_ops = {
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SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend,
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tegra_aconnect_runtime_resume, NULL)
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SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
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pm_runtime_force_resume)
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};
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static const struct of_device_id tegra_aconnect_of_match[] = {
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{ .compatible = "nvidia,tegra210-aconnect", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);
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static struct platform_driver tegra_aconnect_driver = {
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.probe = tegra_aconnect_probe,
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.remove_new = tegra_aconnect_remove,
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.driver = {
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.name = "tegra-aconnect",
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.of_match_table = tegra_aconnect_of_match,
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.pm = &tegra_aconnect_pm_ops,
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},
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};
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module_platform_driver(tegra_aconnect_driver);
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MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver");
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MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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