linux-kernel - [PATCH 2/5] ARM: dts: sun8i: V3/S3: Add UART1 pin definitions to the V3/S3 dtsi

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Date:   Thu, 29 Oct 2020 02:19:57 +0000
From:   Matteo Scordino <matteo.scordino@...il.com>
To:     mripard@...nel.org, wens@...e.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        Matteo Scordino <matteo.scordino@...il.com>
Subject: [PATCH 2/5] ARM: dts: sun8i: V3/S3: Add UART1 pin definitions to the V3/S3 dtsi

The Allwinner V3 and S3 can use PG6/7 as RX/TX for UART1. Since no other
functions are assigned to those pins, they are a convenient choice for
a debugging or application UART.
This is specific to V3/S3 as the V3s's non-BGA package did not have
those pins.

Signed-off-by: Matteo Scordino <matteo.scordino@...il.com>
---
 arch/arm/boot/dts/sun8i-v3.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-v3.dtsi b/arch/arm/boot/dts/sun8i-v3.dtsi
index ca4672ed2e02..c279e13583ba 100644
--- a/arch/arm/boot/dts/sun8i-v3.dtsi
+++ b/arch/arm/boot/dts/sun8i-v3.dtsi
@@ -24,4 +24,9 @@
 
 &pio {
 	compatible = "allwinner,sun8i-v3-pinctrl";
+
+	uart1_pg_pins: uart1-pg-pins {
+		pins = "PG6", "PG7";
+		function = "uart1";
+	};
 };
-- 
2.20.1