diff options
| author | Jisheng Zhang <jszhang@kernel.org> | 2025-06-29 17:46:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-30 15:42:36 +0200 |
| commit | 7481a97c5f49f10c7490bb990d0e863f23b9bb71 (patch) | |
| tree | 60c73a72e1a177ed3041084142eda3a9f14bbd3b | |
| parent | f63f7aec0057fd187a1212a5828560c3d9fcc739 (diff) | |
usb: dwc2: disable platform lowlevel hw resources during shutdown
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>
| -rw-r--r-- | drivers/usb/dwc2/platform.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index 12b4dc07d08a..3f83ecc9fc23 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -371,6 +371,9 @@ 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); } /** |