Commit aef22ce9 authored by Tony Lindgren's avatar Tony Lindgren Committed by sanglipeng
Browse files

ARM: dts: Fix occasional boot hang for am3 usb 

stable inclusion
from stable-v5.10.206
commit cdbc4a1115a56e87724d7626490c76aea3e24102
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9O5W8

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=cdbc4a1115a56e87724d7626490c76aea3e24102



--------------------------------

[ Upstream commit 9b6a51aab5f5f9f71d2fa16e8b4d530e1643dfcb ]

With subtle timings changes, we can now sometimes get an external abort on
non-linefetch error booting am3 devices at sysc_reset(). This is because
of a missing reset delay needed for the usb target module.

Looks like we never enabled the delay earlier for am3, although a similar
issue was seen earlier with a similar usb setup for dm814x as described in
commit ebf24414 ("ARM: OMAP2+: Use srst_udelay for USB on dm814x").

Cc: stable@vger.kernel.org
Fixes: 0782e857 ("ARM: dts: Probe am335x musb with ti-sysc")
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarsanglipeng <sanglipeng1@jd.com>
parent 668668f1

arch/arm/boot/dts/am33xx.dtsi

+1 −0
Original line number Diff line number Diff line
@@ -347,6 +347,7 @@ 
					<SYSC_IDLE_NO>,

					<SYSC_IDLE_SMART>,

					<SYSC_IDLE_SMART_WKUP>;

			ti,sysc-delay-us = <2>;

			clocks = <&l3s_clkctrl AM3_L3S_USB_OTG_HS_CLKCTRL 0>;

			clock-names = "fck";

			#address-cells = <1>;