From: Chen-Yu Tsai <wens@csie.org>
Date: Fri, 31 Oct 2014 03:05:51 +0000 (+0800)
Subject: ARM: dts: sun9i: Enable uart4 for A80 Optimus board
X-Git-Tag: v3.19-rc1~167^2~9^2~21
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=80204f37d6367a304e2b8a6c8c4c207c97832a39;p=linux.git

ARM: dts: sun9i: Enable uart4 for A80 Optimus board

The A80 Optimus board exposes uart4 on the GPIO expansion header.
Enable it so we can use it.

Also enable the internal pull-ups, as there doesn't seem to be
external pull-up resistors for pins on the expansion header.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---

diff --git a/arch/arm/boot/dts/sun9i-a80-optimus.dts b/arch/arm/boot/dts/sun9i-a80-optimus.dts
index 87b1355e3cd7..506948f582ee 100644
--- a/arch/arm/boot/dts/sun9i-a80-optimus.dts
+++ b/arch/arm/boot/dts/sun9i-a80-optimus.dts
@@ -71,6 +71,11 @@ led_pins_optimus: led-pins@0 {
 				allwinner,drive = <0>;
 				allwinner,pull = <0>;
 			};
+
+			uart4_pins_a: uart4@0 {
+				/* Enable internal pull-up */
+				allwinner,pull = <1>;
+			};
 		};
 
 		uart0: serial@07000000 {
@@ -79,6 +84,12 @@ uart0: serial@07000000 {
 			status = "okay";
 		};
 
+		uart4: serial@07001000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart4_pins_a>;
+			status = "okay";
+		};
+
 		i2c3: i2c@07003400 {
 			pinctrl-names = "default";
 			pinctrl-0 = <&i2c3_pins_a>;