linux-kernel - [PATCH v2 1/6] ARM: dts: stm32: fix slew-rate of USART2 on stm32mp15xx-dkx

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Message-ID: <20230328153723.498672-2-valentin.caron@foss.st.com>
Date:   Tue, 28 Mar 2023 17:37:18 +0200
From:   Valentin Caron <valentin.caron@...s.st.com>
To:     Alexandre Torgue <alexandre.torgue@...s.st.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Valentin Caron <valentin.caron@...s.st.com>,
        <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 1/6] ARM: dts: stm32: fix slew-rate of USART2 on stm32mp15xx-dkx

On stm32mp15xx-dkx boards:
- Fix slew-rate of USART 2 to 0 like other USARTs, because frequency of
USART pins doesn't exceed 10Mhz.

Signed-off-by: Valentin Caron <valentin.caron@...s.st.com>
---
 arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
index e15a3b2a9b39..e86d989dd351 100644
--- a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
@@ -2178,7 +2178,7 @@ pins1 {
 				 <STM32_PINMUX('D', 4, AF7)>; /* USART2_RTS */
 			bias-disable;
 			drive-push-pull;
-			slew-rate = <3>;
+			slew-rate = <0>;
 		};
 		pins2 {
 			pinmux = <STM32_PINMUX('D', 6, AF7)>, /* USART2_RX */
@@ -2196,7 +2196,7 @@ pins2 {
 			pinmux = <STM32_PINMUX('D', 4, AF7)>; /* USART2_RTS */
 			bias-disable;
 			drive-push-pull;
-			slew-rate = <3>;
+			slew-rate = <0>;
 		};
 		pins3 {
 			pinmux = <STM32_PINMUX('D', 6, AF7)>; /* USART2_RX */
-- 
2.25.1