UDOO missing ttymxc3
mkuf opened this issue · comments
Hi There,
in 9d78e96 there was a patch added to sync the pincfgs with UDOOboard/linux_kernel which is missing since 4.8.x
Therefore uart4 (/dev/ttymxc3) which is used to communicate with the onboard sam3x is not available.
Manually applying the old Patch creates an error while compiling, a stripped down version to add only the pincfg for uart4 works fine (tested with 4.9.x).
diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
index a173de2..31eceea 100644
--- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
@@ -177,6 +177,13 @@
>;
};
+ pinctrl_uart4: uart4grp {
+ fsl,pins = <
+ MX6QDL_PAD_KEY_COL0__UART4_TX_DATA 0x1b0b1
+ MX6QDL_PAD_KEY_ROW0__UART4_RX_DATA 0x1b0b1
+ >;
+ };
+
pinctrl_usbh: usbhgrp {
fsl,pins = <
MX6QDL_PAD_GPIO_17__GPIO7_IO12 0x1b0b0
@@ -247,6 +254,12 @@
status = "okay";
};
+&uart4 { // iMX6-Arduino internal serial port - ttymxc3
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart4>;
+ status = "okay";
+};
+
&usbh1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usbh>;
@voodoo-bravo i'd post this asap to the mailing list, things are closing up quickly for v4.20/v5 this week, so this could get in the next release.. (i don't see a reason why this shouldn't be mainline)
otherwise i'll add this to my main dev branch..
Regards,
@RobertCNelson Good point. I'll dig through the contribution guide and let you know if the patch gets accepted.
Thanks!
For imx soc's, my git send-email notes are:
--to "shawn.guo@linaro.org"
--cc "devicetree@vger.kernel.org"
--cc "linux-arm-kernel@lists.infradead.org"The patch was merged into linux-next, so I'm closing this issue.
Thanks for your Help.
The patches for udoo uart and arduino driver are linked here if you need them; should work on newer kernels, I just haven't had time to test them lately...
https://wiki.gentoo.org/wiki/Udoo
https://github.com/gentoo/arm/tree/master/sys-kernel/armv7multi-sources/files