[PATCH 3/5] arm64: dts: st: Reuse sdmmc1_*_pins_a pinmux

Marek Vasut marex at nabladev.com
Tue Sep 29 12:39:57 PDT 2026


It is perfectly possible to use sdmmc1_*_pins_a on the DH electronics
STM32MP23xx/STM32MP25xx DHCOS SoM, the only difference is the slew rate.
Reuse sdmmc1_*_pins_a with updated slew rate on board level.

Fixes: 9b584c92f94f ("arm64: dts: st: Add support for DH electronics STM32MP23xx/STM32MP25xx DHCOS SoM and Breakout Board and DHSBC")
Signed-off-by: Marek Vasut <marex at nabladev.com>
---
Cc: Alexandre Torgue <alexandre.torgue at foss.st.com>
Cc: Bartosz Golaszewski <brgl at kernel.org>
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: Linus Walleij <linusw at kernel.org>
Cc: Rob Herring <robh at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: kernel at dh-electronics.com
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-gpio at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: linux-stm32 at st-md-mailman.stormreply.com
---
 .../boot/dts/st/stm32mp255c-dhcos-dhsbc.dts   | 28 +++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/st/stm32mp255c-dhcos-dhsbc.dts b/arch/arm64/boot/dts/st/stm32mp255c-dhcos-dhsbc.dts
index 332a8034cc372..eea7a76953639 100644
--- a/arch/arm64/boot/dts/st/stm32mp255c-dhcos-dhsbc.dts
+++ b/arch/arm64/boot/dts/st/stm32mp255c-dhcos-dhsbc.dts
@@ -145,10 +145,34 @@ &scmi_vddio1 {
 	regulator-settling-time-down-us = <100000>;
 };
 
+&sdmmc1_b4_pins_a {
+	pins1 {
+		slew-rate = <1>;
+	};
+
+	pins2 {
+		slew-rate = <2>;
+	};
+};
+
+&sdmmc1_b4_od_pins_a {
+	pins1 {
+		slew-rate = <1>;
+	};
+
+	pins2 {
+		slew-rate = <2>;
+	};
+
+	pins3 {
+		slew-rate = <1>;
+	};
+};
+
 &sdmmc1 {
 	pinctrl-names = "default", "opendrain", "sleep";
-	pinctrl-0 = <&sdmmc1_b4_pins_b>;
-	pinctrl-1 = <&sdmmc1_b4_od_pins_b>;
+	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	pinctrl-1 = <&sdmmc1_b4_od_pins_a>;
 	pinctrl-2 = <&sdmmc1_b4_sleep_pins_a>;
 	cd-gpios = <&ioexp 8 GPIO_ACTIVE_HIGH>;
 	disable-wp;
-- 
2.53.0




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