linux-kernel - [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

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Date:   Fri, 22 Dec 2017 14:06:33 +0800
From:   <sean.wang@...iatek.com>
To:     <robh+dt@...nel.org>, <matthias.bgg@...il.com>,
        <mark.rutland@....com>, <devicetree@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Sean Wang <sean.wang@...iatek.com>
Subject: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

From: Sean Wang <sean.wang@...iatek.com>

On bpi-r2 board, totally there're four uarts which we usually called
uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
dedicated pin slot which is used to conolse log. uart[0-1] appear at the
40-pins connector and uart3 has no pinout, but just has test points (TP47
for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
pinctrl is being complemented for those devices.

Signed-off-by: Sean Wang <sean.wang@...iatek.com>
---
 arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
index 7bf5aa2..64bf5db 100644
--- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
+++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
@@ -409,6 +409,20 @@
 				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
 		};
 	};
+
+	uart2_pins_a: uart@2 {
+		pins_dat {
+			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
+				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
+		};
+	};
+
+	uart3_pins_a: uart@3 {
+		pins_dat {
+			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
+				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
+		};
+	};
 };
 
 &pwm {
@@ -454,16 +468,24 @@
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_a>;
-	status = "disabled";
+	status = "okay";
 };
 
 &uart1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart1_pins_a>;
-	status = "disabled";
+	status = "okay";
 };
 
 &uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2_pins_a>;
+	status = "okay";
+};
+
+&uart3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart3_pins_a>;
 	status = "okay";
 };
 
-- 
2.7.4