usb: musb: unconditionally save and restore the context on suspend (c338412b) · Commits · 戴 / test

It appears not all platforms featuring a musb core need to save the musb core registers at suspend time and restore them on resume. The dsps platform does, however, and because it shouldn't cause any trouble on other platforms, do it unconditionally for all of them. Signed-off-by:

Daniel Mack <zonque@gmail.com> Signed-off-by:

Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_core.c

+13 −1

Original line number	Diff line number	Diff line
		@@ -2224,16 +2224,28 @@ static int musb_suspend(struct device *dev)
		*/
		}

		musb_save_context(musb);

		spin_unlock_irqrestore(&musb->lock, flags);
		return 0;
		}

		static int musb_resume_noirq(struct device *dev)
		{
		/* for static cmos like DaVinci, register values were preserved
		struct musb *musb = dev_to_musb(dev);

		/*
		* For static cmos like DaVinci, register values were preserved
		* unless for some reason the whole soc powered down or the USB
		* module got reset through the PSC (vs just being disabled).
		*
		* For the DSPS glue layer though, a full register restore has to
		* be done. As it shouldn't harm other platforms, we do it
		* unconditionally.
		*/

		musb_restore_context(musb);

		return 0;
		}

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