PM / devfreq: exynos-bus: Suspend all devices on system shutdown
Force all Exynos buses to safe operation points before doing the system reboot operation. There are board on which some aggressive power saving operation points are behind the capabilities of the bootloader to properly reset the hardware and boot the board. This way one can avoid board crash early after reboot. This fixes reboot issue on OdroidU3 board both with eMMC and SD boot. Reported-by: Markus Reichl <m.reichl@fivetechno.de> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
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@ -514,6 +514,13 @@ err:
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return ret;
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}
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static void exynos_bus_shutdown(struct platform_device *pdev)
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{
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struct exynos_bus *bus = dev_get_drvdata(&pdev->dev);
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devfreq_suspend_device(bus->devfreq);
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}
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#ifdef CONFIG_PM_SLEEP
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static int exynos_bus_resume(struct device *dev)
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{
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@ -556,6 +563,7 @@ MODULE_DEVICE_TABLE(of, exynos_bus_of_match);
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static struct platform_driver exynos_bus_platdrv = {
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.probe = exynos_bus_probe,
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.shutdown = exynos_bus_shutdown,
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.driver = {
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.name = "exynos-bus",
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.pm = &exynos_bus_pm,
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