From c338412b5dedf405d3f8ba3af1a61fa623319e1d Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Mon, 25 Nov 2013 22:26:40 +0100 Subject: [PATCH] usb: musb: unconditionally save and restore the context on suspend 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 Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_core.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 377ef9b29c73..ac96e4ce7e95 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -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; } -- 2.39.5