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d31d14bf07
This reverts commit98e96cf800. The following commit introduced in v5.15-rc6 breaks i.MX8QM/QXP suspend/resume. The issue was reported in community [1] and still under discussion and not conclusion on the proper fix so far. This patch temporarily revert it in order to make the release work. i.MX seems not use .sync_state() mentioned in the original commit, suppose it may be safe as we also havn't used it before.98e96cf800("drivers: bus: simple-pm-bus: Add support for probing simple bus only devices") 1. https://lore.kernel.org/all/YYu4EglV7SBZU2Iy@ryzen/ Signed-off-by: Abel Vesa <abel.vesa@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Simple Power-Managed Bus Driver
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*
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* Copyright (C) 2014-2015 Glider bvba
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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.h>
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#include <linux/of_device.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 simple_pm_bus {
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struct clk_bulk_data *clks;
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int num_clks;
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};
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static int simple_pm_bus_probe(struct platform_device *pdev)
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{
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struct simple_pm_bus *bus;
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const struct of_dev_auxdata *lookup = dev_get_platdata(&pdev->dev);
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struct device_node *np = pdev->dev.of_node;
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bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
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if (!bus)
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return -ENOMEM;
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bus->num_clks = devm_clk_bulk_get_all(&pdev->dev, &bus->clks);
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if (bus->num_clks < 0)
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return dev_err_probe(&pdev->dev, bus->num_clks, "failed to get clocks\n");
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dev_set_drvdata(&pdev->dev, bus);
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dev_dbg(&pdev->dev, "%s\n", __func__);
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pm_runtime_enable(&pdev->dev);
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if (np)
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of_platform_populate(np, NULL, lookup, &pdev->dev);
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return 0;
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}
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static int simple_pm_bus_remove(struct platform_device *pdev)
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{
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dev_dbg(&pdev->dev, "%s\n", __func__);
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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static int simple_pm_bus_runtime_suspend(struct device *dev)
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{
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struct simple_pm_bus *bus = dev_get_drvdata(dev);
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clk_bulk_disable_unprepare(bus->num_clks, bus->clks);
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return 0;
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}
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static int simple_pm_bus_runtime_resume(struct device *dev)
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{
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struct simple_pm_bus *bus = dev_get_drvdata(dev);
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int ret;
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ret = clk_bulk_prepare_enable(bus->num_clks, bus->clks);
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if (ret) {
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dev_err(dev, "failed to enable clocks: %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 const struct dev_pm_ops simple_pm_bus_pm_ops = {
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RUNTIME_PM_OPS(simple_pm_bus_runtime_suspend, simple_pm_bus_runtime_resume, NULL)
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NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
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};
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static const struct of_device_id simple_pm_bus_of_match[] = {
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{ .compatible = "simple-pm-bus", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, simple_pm_bus_of_match);
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static struct platform_driver simple_pm_bus_driver = {
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.probe = simple_pm_bus_probe,
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.remove = simple_pm_bus_remove,
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.driver = {
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.name = "simple-pm-bus",
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.of_match_table = simple_pm_bus_of_match,
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.pm = pm_ptr(&simple_pm_bus_pm_ops),
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},
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};
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module_platform_driver(simple_pm_bus_driver);
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MODULE_DESCRIPTION("Simple Power-Managed Bus Driver");
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MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
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