| Message ID | 20240504-ti-rs485-rts-v1-1-e88ef1c96f34@solid-run.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: dts: ti: k3-am642-hummingboard-t: correct rs485 rts polarity | expand |
Hi Josua Mayer, On Sat, 04 May 2024 13:35:54 +0200, Josua Mayer wrote: > The RS485 transceiver RE (Receiver enable) and DE (Driver enable) are > shorted and connected to both RTS/CTS of the SoC UART. > RE is active-low, DE is active-high. > > Remove the "rs485-rts-active-low" flag to match RTS polarity with DE, > and fix communication in both transmit and receive directions. > > [...] I have applied the following to branch ti-k3-dts-next on [1]. Thank you! [1/1] arm64: dts: ti: k3-am642-hummingboard-t: correct rs485 rts polarity commit: 9dcc0e1065f3c40d0b2ad79a858bb4ebaba33167 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent up the chain during the next merge window (or sooner if it is a relevant bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. [1] https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux.git -- Vignesh
diff --git a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts index 234d76e4e944..5b5e9eeec5ac 100644 --- a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts +++ b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts @@ -282,7 +282,6 @@ &main_uart3 { pinctrl-names = "default"; pinctrl-0 = <&main_uart3_default_pins>; uart-has-rtscts; - rs485-rts-active-low; linux,rs485-enabled-at-boot-time; status = "okay"; };
The RS485 transceiver RE (Receiver enable) and DE (Driver enable) are shorted and connected to both RTS/CTS of the SoC UART. RE is active-low, DE is active-high. Remove the "rs485-rts-active-low" flag to match RTS polarity with DE, and fix communication in both transmit and receive directions. Fixes: d60483faf914 ("arm64: dts: add description for solidrun am642 som and evaluation board") Signed-off-by: Josua Mayer <josua@solid-run.com> --- arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts | 1 - 1 file changed, 1 deletion(-) --- base-commit: 4cece764965020c22cff7665b18a012006359095 change-id: 20240504-ti-rs485-rts-e08a68eac841 Sincerely,