Hi,
I do not think this patch alone will work on 4.14.
An earlier pair of patches which implements the "marvell,armada-38x-uart" quirk is present on the other kernel versions, but I do see it as far back as 4.14.
The following two patches are the ones which add support for that compatible string:
b7639b0b15dd serial: 8250_dw: Limit dw8250_tx_wait_empty quirk to armada-38x devices 914eaf935ec7 serial: 8250_dw: Allow TX FIFO to drain before writing to UART_LCR
Cheers, Joshua Scott ________________________________________ From: gregkh@linuxfoundation.org gregkh@linuxfoundation.org Sent: Friday, 5 July 2019 8:59 p.m. To: andrew@lunn.ch; gregkh@linuxfoundation.org; gregory.clement@bootlin.com; Joshua Scott Cc: stable-commits@vger.kernel.org Subject: Patch "ARM: dts: armada-xp-98dx3236: Switch to armada-38x-uart serial node" has been added to the 4.14-stable tree
This is a note to let you know that I've just added the patch titled
ARM: dts: armada-xp-98dx3236: Switch to armada-38x-uart serial node
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: arm-dts-armada-xp-98dx3236-switch-to-armada-38x-uart-serial-node.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 80031361747aec92163464f2ee08870fec33bcb0 Mon Sep 17 00:00:00 2001
From: Joshua Scott joshua.scott@alliedtelesis.co.nz Date: Wed, 26 Jun 2019 10:11:08 +1200 Subject: ARM: dts: armada-xp-98dx3236: Switch to armada-38x-uart serial node
From: Joshua Scott joshua.scott@alliedtelesis.co.nz
commit 80031361747aec92163464f2ee08870fec33bcb0 upstream.
Switch to the "marvell,armada-38x-uart" driver variant to empty the UART buffer before writing to the UART_LCR register.
Signed-off-by: Joshua Scott joshua.scott@alliedtelesis.co.nz Tested-by: Andrew Lunn andrew@lunn.ch Acked-by: Gregory CLEMENT gregory.clement@bootlin.com. Cc: stable@vger.kernel.org Fixes: 43e28ba87708 ("ARM: dts: Use armada-370-xp as a base for armada-xp-98dx3236") Signed-off-by: Gregory CLEMENT gregory.clement@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm/boot/dts/armada-xp-98dx3236.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/arch/arm/boot/dts/armada-xp-98dx3236.dtsi +++ b/arch/arm/boot/dts/armada-xp-98dx3236.dtsi @@ -360,3 +360,11 @@ status = "disabled"; };
+&uart0 { + compatible = "marvell,armada-38x-uart"; +}; + +&uart1 { + compatible = "marvell,armada-38x-uart"; +}; +
Patches currently in stable-queue which might be from joshua.scott@alliedtelesis.co.nz are
queue-4.14/arm-dts-armada-xp-98dx3236-switch-to-armada-38x-uart-serial-node.patch