openwrt/target/linux/imx6
Koen Vandeputte efb362cd93 imx6: disable dma on uart
When this target got updated to 4.14, this patch got removed to
re-evaluate if it was still needed.

Extensive testing now shows this issue is still present.
Let's re-add the patch to fix it for now.

As the uart bus is very low bandwidth .. performance impact is negligible.

Boot log:

[   22.513051] imx-uart 2020000.serial: DMA transaction error.
[   22.522721] imx-uart 2020000.serial: DMA transaction error.

As a sidenote:
The patch mentiones an issue with RS485, but the bootlog
errors above were recorded with the uart ports in standard RS232 mode.

Compile/Run-tested on imx6/GW5200

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2018-02-22 12:46:49 +01:00
..
base-files treewide: move nand_do_upgrade call to platform_do_upgrade 2018-02-16 14:44:02 +01:00
image imx6: use DTS_DIR at image build code 2018-02-10 21:02:53 +01:00
patches-4.14 imx6: disable dma on uart 2018-02-22 12:46:49 +01:00
profiles imx6: enable the chipidea usb driver in the kernel config instead of packaging it 2017-01-10 12:10:20 +01:00
Makefile imx6: switch to Linux 4.14 2018-02-19 09:32:43 +01:00
config-4.14 imx6: add support for Linux 4.14 2018-02-19 09:32:43 +01:00