From: Tony Lindgren <tony@atomide.com>
Date: Mon, 11 Sep 2023 04:07:38 +0000 (+0300)
Subject: ARM: dts: ti: omap: Fix noisy serial with overrun-throttle-ms for mapphone
X-Git-Tag: v4.14.328~25
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=551541a0beb72c37c791cdfb8554598e215f798c;p=thirdparty%2Fkernel%2Fstable.git

ARM: dts: ti: omap: Fix noisy serial with overrun-throttle-ms for mapphone

[ Upstream commit 5ad37b5e30433afa7a5513e3eb61f69fa0976785 ]

On mapphone devices we may get lots of noise on the micro-USB port in debug
uart mode until the phy-cpcap-usb driver probes. Let's limit the noise by
using overrun-throttle-ms.

Note that there is also a related separate issue where the charger cable
connected may cause random sysrq requests until phy-cpcap-usb probes that
still remains.

Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Cc: Carl Philipp Klemm <philipp@uvos.xyz>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/arch/arm/boot/dts/omap4-droid4-xt894.dts b/arch/arm/boot/dts/omap4-droid4-xt894.dts
index bad690b23081b..6d2ee40d88e1c 100644
--- a/arch/arm/boot/dts/omap4-droid4-xt894.dts
+++ b/arch/arm/boot/dts/omap4-droid4-xt894.dts
@@ -533,6 +533,7 @@
 &uart3 {
 	interrupts-extended = <&wakeupgen GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
 			       &omap4_pmx_core 0x17c>;
+	overrun-throttle-ms = <500>;
 };
 
 &uart4 {