We can babble interrupt if we attempt to switch to USB host mode too soon after enabling musb. Let's fix the issue by waiting a bit in runtime_resume.
Cc: Jacopo Mondi <[email protected]> Cc: Marcel Partap <[email protected]> Cc: Merlijn Wajer <[email protected]> Cc: Michael Scott <[email protected]> Cc: NeKit <[email protected]> Cc: Pavel Machek <[email protected]> Cc: Sebastian Reichel <[email protected]> Signed-off-by: Tony Lindgren <[email protected]> --- drivers/usb/musb/omap2430.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -552,6 +552,9 @@ static int omap2430_runtime_resume(struct device *dev) musb_writel(musb->mregs, OTG_INTERFSEL, musb->context.otg_interfsel); + /* Wait for musb to get oriented. Otherwise we can get babble */ + usleep_range(200000, 250000); + return 0; } -- 2.23.0
