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From: Nick Xie <nick@khadas.com>
To: neil.armstrong@linaro.org, khilman@baylibre.com,
	martin.blumenstingl@googlemail.com, jbrunet@baylibre.com,
	krzk+dt@kernel.org
Cc: robh@kernel.org, conor+dt@kernel.org,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, Nick Xie <nick@khadas.com>
Subject: [PATCH v2 1/4] arm64: dts: amlogic: meson-s4: add UART_A node
Date: Sat, 28 Feb 2026 14:37:47 +0800	[thread overview]
Message-ID: <20260228063750.701887-2-nick@khadas.com> (raw)
In-Reply-To: <20260228063750.701887-1-nick@khadas.com>

Add the UART_A node and its related pinctrl definitions to the
Meson S4 SoC dtsi.

The pinctrl groups are split into basic tx/rx and flow control (cts/rts)
to allow board-level flexibility.

This interface is typically used for Bluetooth communication on
boards like the Khadas VIM1S.

Signed-off-by: Nick Xie <nick@khadas.com>
---
 arch/arm64/boot/dts/amlogic/meson-s4.dtsi | 26 +++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
index dfc0a30a6e61b..4a3e9ad82d280 100644
--- a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
@@ -163,6 +163,22 @@ mux {
 					};
 				};
 
+				uart_a_pins: uart-a-pins {
+					mux {
+						groups = "uart_a_tx",
+						       "uart_a_rx";
+						function = "uart_a";
+					};
+				};
+
+				uart_a_cts_rts_pins: uart-a-cts-rts-pins {
+					mux {
+						groups = "uart_a_cts",
+						       "uart_a_rts";
+						function = "uart_a";
+					};
+				};
+
 				i2c0_pins1: i2c0-pins1 {
 					mux {
 						groups = "i2c0_sda",
@@ -814,6 +830,16 @@ mdio0: mdio {
 			};
 		};
 
+		uart_a: serial@fe078000 {
+			compatible = "amlogic,meson-s4-uart",
+				     "amlogic,meson-ao-uart";
+			reg = <0x0 0xfe078000 0x0 0x18>;
+			interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&xtal>, <&clkc_periphs CLKID_UART_A>, <&xtal>;
+			clock-names = "xtal", "pclk", "baud";
+			status = "disabled";
+		};
+
 		sdio: mmc@fe088000 {
 			compatible = "amlogic,meson-axg-mmc";
 			reg = <0x0 0xfe088000 0x0 0x800>;
-- 
2.34.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

WARNING: multiple messages have this Message-ID (diff)
From: Nick Xie <nick@khadas.com>
To: neil.armstrong@linaro.org, khilman@baylibre.com,
	martin.blumenstingl@googlemail.com, jbrunet@baylibre.com,
	krzk+dt@kernel.org
Cc: robh@kernel.org, conor+dt@kernel.org,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, Nick Xie <nick@khadas.com>
Subject: [PATCH v2 1/4] arm64: dts: amlogic: meson-s4: add UART_A node
Date: Sat, 28 Feb 2026 14:37:47 +0800	[thread overview]
Message-ID: <20260228063750.701887-2-nick@khadas.com> (raw)
In-Reply-To: <20260228063750.701887-1-nick@khadas.com>

Add the UART_A node and its related pinctrl definitions to the
Meson S4 SoC dtsi.

The pinctrl groups are split into basic tx/rx and flow control (cts/rts)
to allow board-level flexibility.

This interface is typically used for Bluetooth communication on
boards like the Khadas VIM1S.

Signed-off-by: Nick Xie <nick@khadas.com>
---
 arch/arm64/boot/dts/amlogic/meson-s4.dtsi | 26 +++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
index dfc0a30a6e61b..4a3e9ad82d280 100644
--- a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
@@ -163,6 +163,22 @@ mux {
 					};
 				};
 
+				uart_a_pins: uart-a-pins {
+					mux {
+						groups = "uart_a_tx",
+						       "uart_a_rx";
+						function = "uart_a";
+					};
+				};
+
+				uart_a_cts_rts_pins: uart-a-cts-rts-pins {
+					mux {
+						groups = "uart_a_cts",
+						       "uart_a_rts";
+						function = "uart_a";
+					};
+				};
+
 				i2c0_pins1: i2c0-pins1 {
 					mux {
 						groups = "i2c0_sda",
@@ -814,6 +830,16 @@ mdio0: mdio {
 			};
 		};
 
+		uart_a: serial@fe078000 {
+			compatible = "amlogic,meson-s4-uart",
+				     "amlogic,meson-ao-uart";
+			reg = <0x0 0xfe078000 0x0 0x18>;
+			interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&xtal>, <&clkc_periphs CLKID_UART_A>, <&xtal>;
+			clock-names = "xtal", "pclk", "baud";
+			status = "disabled";
+		};
+
 		sdio: mmc@fe088000 {
 			compatible = "amlogic,meson-axg-mmc";
 			reg = <0x0 0xfe088000 0x0 0x800>;
-- 
2.34.1



  reply	other threads:[~2026-02-28  6:38 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-28  6:37 [PATCH v2 0/4] arm64: dts: amlogic: meson-s4-khadas-vim1s: enable LEDs, Keys and Bluetooth Nick Xie
2026-02-28  6:37 ` Nick Xie
2026-02-28  6:37 ` Nick Xie [this message]
2026-02-28  6:37   ` [PATCH v2 1/4] arm64: dts: amlogic: meson-s4: add UART_A node Nick Xie
2026-03-02 11:49   ` Martin Blumenstingl
2026-03-02 11:49     ` Martin Blumenstingl
2026-02-28  6:37 ` [PATCH v2 2/4] arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: enable bluetooth Nick Xie
2026-02-28  6:37   ` Nick Xie
2026-02-28  6:37 ` [PATCH v2 3/4] arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: add PWM LED support Nick Xie
2026-02-28  6:37   ` Nick Xie
2026-02-28  6:37 ` [PATCH v2 4/4] arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: add POWER key support Nick Xie
2026-02-28  6:37   ` Nick Xie
2026-03-26  9:06 ` [PATCH v2 0/4] arm64: dts: amlogic: meson-s4-khadas-vim1s: enable LEDs, Keys and Bluetooth Neil Armstrong
2026-03-26  9:06   ` Neil Armstrong

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