[PATCH] ARM: dts: renesas: r9a06g032-rzn1d400-eb: describe 9-pin SubD-serial port

[PATCH] ARM: dts: renesas: r9a06g032-rzn1d400-eb: describe 9-pin SubD-serial port

[Wolfram Sang]

A simple CTS/RTS capable UART on a good old SubD connector.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

Change since RFC:
* kept the UART numbering

 .../boot/dts/renesas/r9a06g032-rzn1d400-eb.dts    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts b/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
index 975446b2ac97..a3ef9d407a95 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
+++ b/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
@@ -145,6 +145,14 @@ pins_sdio1_clk: pins-sdio1-clk {
 		pinmux = <RZN1_PINMUX(96, RZN1_FUNC_SDIO)>;
 		drive-strength = <12>;
 	};
+
+	pins_uart2: pins-uart2 {
+		pinmux = <RZN1_PINMUX(105, RZN1_FUNC_UART2)>,
+			 <RZN1_PINMUX(106, RZN1_FUNC_UART2)>,
+			 <RZN1_PINMUX(107, RZN1_FUNC_UART2)>,
+			 <RZN1_PINMUX(108, RZN1_FUNC_UART2)>;
+		bias-disable;
+	};
 };
 
 &sdio1 {
@@ -221,3 +229,10 @@ &switch_port3 {
 	phy-handle = <&switch0phy1>;
 	status = "okay";
 };
+
+&uart2 {
+	pinctrl-0 = <&pins_uart2>;
+	pinctrl-names = "default";
+	status = "okay";
+	uart-has-rtscts;
+};
-- 
2.47.2

Re: [PATCH] ARM: dts: renesas: r9a06g032-rzn1d400-eb: describe 9-pin SubD-serial port

[Geert Uytterhoeven]

Hi Wolfram,

Thanks for your patch!

On Thu, 24 Apr 2025 at 12:28, Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> A simple CTS/RTS capable UART on a good old SubD connector.

D-sub

> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v6.16.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds