6.1-stable review patch. If anyone has any objections, please let me know.
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From: Jisheng Zhang jszhang@kernel.org
[ Upstream commit 7481a97c5f49f10c7490bb990d0e863f23b9bb71 ]
On some SoC platforms, in shutdown stage, most components' power is cut off, but there's still power supply to the so called always-on domain, so if the dwc2's regulator is from the always-on domain, we need to explicitly disable it to save power.
Disable platform lowlevel hw resources such as phy, clock and regulators etc. in device shutdown hook to reduce non-necessary power consumption when the platform enters shutdown stage.
Signed-off-by: Jisheng Zhang jszhang@kernel.org Acked-by: Minas Harutyunyan hminas@synopsys.com Link: https://lore.kernel.org/r/20250629094655.747-1-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Stable-dep-of: b6ebcfdcac40 ("usb: dwc2: fix hang during shutdown if set as peripheral") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/dwc2/platform.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index 9de5a1be4a0ae..5e8c74e20bffa 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -340,6 +340,9 @@ static void dwc2_driver_shutdown(struct platform_device *dev)
dwc2_disable_global_interrupts(hsotg); synchronize_irq(hsotg->irq); + + if (hsotg->ll_hw_enabled) + dwc2_lowlevel_hw_disable(hsotg); }
/**