linux-kernel - [PATCH 2/3] ARM: dts: at91: sam9x60ek: classd: pull-down the L1 and L3 lines

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Message-ID: <20200615095525.43414-2-codrin.ciubotariu@microchip.com>
Date:   Mon, 15 Jun 2020 12:55:24 +0300
From:   Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
To:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <robh+dt@...nel.org>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>,
        <claudiu.beznea@...rochip.com>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Subject: [PATCH 2/3] ARM: dts: at91: sam9x60ek: classd: pull-down the L1 and L3 lines

The L1 and L3 lines drive NMOS transistors that are OFF with a low level.
On the SAM9X60 EK board, if the pins corresponding to L1 and L3
have pull-ups enabled, there is an extra 2 x 30uA power consumption.
Use pull-downs for these 2 lines to remove the unnecessary power
consumption.

Fixes: 1e5f532c2737 ("ARM: dts: at91: sam9x60: add device tree for soc and board")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
---
 arch/arm/boot/dts/at91-sam9x60ek.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/at91-sam9x60ek.dts b/arch/arm/boot/dts/at91-sam9x60ek.dts
index b484745bf2d4..3b9bb29d9e23 100644
--- a/arch/arm/boot/dts/at91-sam9x60ek.dts
+++ b/arch/arm/boot/dts/at91-sam9x60ek.dts
@@ -470,9 +470,9 @@ classd {
 		pinctrl_classd_default: classd {
 			atmel,pins =
 				<AT91_PIOA 24 AT91_PERIPH_C AT91_PINCTRL_PULL_UP
-				 AT91_PIOA 25 AT91_PERIPH_C AT91_PINCTRL_PULL_UP
+				 AT91_PIOA 25 AT91_PERIPH_C AT91_PINCTRL_PULL_DOWN
 				 AT91_PIOA 26 AT91_PERIPH_C AT91_PINCTRL_PULL_UP
-				 AT91_PIOA 27 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>;
+				 AT91_PIOA 27 AT91_PERIPH_C AT91_PINCTRL_PULL_DOWN>;
 		};
 	};
 
-- 
2.25.1