[PATCH 1/4] ARM: dts: stm32: update slew-rate properties for sdmmc1 on stm32mp157
From: Yann Gautier
Date: Wed Nov 06 2019 - 05:10:06 EST
Relax sdmmc1 pins slew-rate to minimize peak currents.
Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
Signed-off-by: Yann Gautier <yann.gautier@xxxxxx>
---
arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 28 +++++++++++++++--------
1 file changed, 19 insertions(+), 9 deletions(-)
diff --git a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
index 0a3a7d66737b..2904bc8c6a41 100644
--- a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
@@ -731,14 +731,19 @@
};
sdmmc1_b4_pins_a: sdmmc1-b4-0 {
- pins {
+ pins1 {
pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
<STM32_PINMUX('C', 9, AF12)>, /* SDMMC1_D1 */
<STM32_PINMUX('C', 10, AF12)>, /* SDMMC1_D2 */
<STM32_PINMUX('C', 11, AF12)>, /* SDMMC1_D3 */
- <STM32_PINMUX('C', 12, AF12)>, /* SDMMC1_CK */
<STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */
- slew-rate = <3>;
+ slew-rate = <1>;
+ drive-push-pull;
+ bias-disable;
+ };
+ pins2 {
+ pinmux = <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */
+ slew-rate = <2>;
drive-push-pull;
bias-disable;
};
@@ -749,15 +754,20 @@
pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
<STM32_PINMUX('C', 9, AF12)>, /* SDMMC1_D1 */
<STM32_PINMUX('C', 10, AF12)>, /* SDMMC1_D2 */
- <STM32_PINMUX('C', 11, AF12)>, /* SDMMC1_D3 */
- <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */
- slew-rate = <3>;
+ <STM32_PINMUX('C', 11, AF12)>; /* SDMMC1_D3 */
+ slew-rate = <1>;
drive-push-pull;
bias-disable;
};
- pins2{
+ pins2 {
+ pinmux = <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */
+ slew-rate = <2>;
+ drive-push-pull;
+ bias-disable;
+ };
+ pins3 {
pinmux = <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */
- slew-rate = <3>;
+ slew-rate = <1>;
drive-open-drain;
bias-disable;
};
@@ -779,7 +789,7 @@
pinmux = <STM32_PINMUX('F', 2, AF11)>, /* SDMMC1_D0DIR */
<STM32_PINMUX('C', 7, AF8)>, /* SDMMC1_D123DIR */
<STM32_PINMUX('B', 9, AF11)>; /* SDMMC1_CDIR */
- slew-rate = <3>;
+ slew-rate = <1>;
drive-push-pull;
bias-pull-up;
};
--
2.17.1