2b94b054ac
dwc2 on most platforms needs phy controller, clock and power supply.
All of them must be enabled/activated to properly operate. If dwc2
is configured as peripheral mode, then all the above three hardware
resources are disabled at the end of the probe:
/* Gadget code manages lowlevel hw on its own */
if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
dwc2_lowlevel_hw_disable(hsotg);
But the dwc2_suspend() tries to read the dwc2's reg to check whether
is_device_mode or not, this would result in hang during suspend if dwc2
is configured as peripheral mode.
Fix this hang by bypassing suspend/resume if lowlevel hw isn't
enabled.
Fixes:
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|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| core.c | ||
| core.h | ||
| core_intr.c | ||
| debug.h | ||
| debugfs.c | ||
| drd.c | ||
| gadget.c | ||
| hcd.c | ||
| hcd.h | ||
| hcd_ddma.c | ||
| hcd_intr.c | ||
| hcd_queue.c | ||
| hw.h | ||
| params.c | ||
| pci.c | ||
| platform.c | ||