linux-kernel - [PATCH 3/3] ARM: dts: at91sam9260: pullup rx on usart0

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Message-Id: <20180321153552.29213-4-peda@axentia.se>
Date:   Wed, 21 Mar 2018 16:35:52 +0100
From:   Peter Rosin <peda@...ntia.se>
To:     linux-kernel@...r.kernel.org
Cc:     Peter Rosin <peda@...ntia.se>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH 3/3] ARM: dts: at91sam9260: pullup rx on usart0

For consistency with all other serial pins, add this pullup. It also
prevents the signal from floating and so consuming a useless extra amount
of power in crowbarred state if nothing is connected to RX.

Signed-off-by: Peter Rosin <peda@...ntia.se>
---
 arch/arm/boot/dts/at91sam9260.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/at91sam9260.dtsi b/arch/arm/boot/dts/at91sam9260.dtsi
index 3ae7e6c55fe4..9118e29b6d6a 100644
--- a/arch/arm/boot/dts/at91sam9260.dtsi
+++ b/arch/arm/boot/dts/at91sam9260.dtsi
@@ -434,8 +434,8 @@
 				usart0 {
 					pinctrl_usart0: usart0-0 {
 						atmel,pins =
-							<AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_NONE	/* PB4 periph A */
-							 AT91_PIOB 5 AT91_PERIPH_A AT91_PINCTRL_NONE>;	/* PB5 periph A */
+							<AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_NONE
+							 AT91_PIOB 5 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
 					};
 
 					pinctrl_usart0_rts: usart0_rts-0 {
-- 
2.11.0