diff --git a/arch/arm/boot/dts/broadcom/bcm2166x-common.dtsi b/arch/arm/boot/dts/broadcom/bcm2166x-common.dtsi
index d4b412ac8b0343bd3773f50c59a20fa00a3923f8..f535212cb52fec0668abfc06e7268bead70d958a 100644
--- a/arch/arm/boot/dts/broadcom/bcm2166x-common.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm2166x-common.dtsi
@@ -337,3 +337,5 @@ master_ccu: master_ccu@3f001000 {
 		};
 	};
 };
+
+#include "bcm2166x-pinctrl.dtsi"
diff --git a/arch/arm/boot/dts/broadcom/bcm2166x-pinctrl.dtsi b/arch/arm/boot/dts/broadcom/bcm2166x-pinctrl.dtsi
new file mode 100644
index 0000000000000000000000000000000000000000..51b8730c8feea501f2c5ca6a7bad8233ed708c82
--- /dev/null
+++ b/arch/arm/boot/dts/broadcom/bcm2166x-pinctrl.dtsi
@@ -0,0 +1,297 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Common pinmux configrations for BCM2166x (BCM21664/BCM23550).
+ *
+ * Copyright (C) 2025 Artur Weber <aweber.kernel@gmail.com>
+ */
+
+&pinctrl {
+	/* BSC1 */
+	bsc1_pins: bsc1-pins {
+		bsc1clk-grp0 {
+			pins = "bsc1clk";
+			function = "alt1"; /* BSC1CLK */
+		};
+
+		bsc1dat-grp0 {
+			pins = "bsc1dat";
+			function = "alt1"; /* BSC1DAT */
+		};
+	};
+
+	/* BSC2 */
+	bsc2_pins: bsc2-pins {
+		bsc2clk-grp0 {
+			pins = "gpio16";
+			function = "alt2"; /* BSC2CLK */
+		};
+
+		bsc2dat-grp0 {
+			pins = "gpio17";
+			function = "alt2"; /* BSC2DAT */
+		};
+	};
+
+	/* BSC3 */
+	bsc3_pins: bsc3-pins {
+		bsc3clk-grp0 {
+			pins = "lcdscl";
+			function = "alt1"; /* BSC3_CLK */
+		};
+
+		bsc3dat-grp0 {
+			pins = "lcdsda";
+			function = "alt1"; /* BSC3_SDA */
+		};
+	};
+
+	/* BSC4 */
+	bsc4_pins: bsc4-pins {
+		bsc4clk-grp0 {
+			pins = "lcdres";
+			function = "alt1"; /* BSC4_CLK */
+		};
+
+		bsc4dat-grp0 {
+			pins = "lcdte";
+			function = "alt1"; /* BSC4_SDA */
+		};
+	};
+
+	/* PMBSC */
+	pmbsc_pins: pmbsc-pins {
+		pmbscclk-grp0 {
+			pins = "pmbscclk";
+			function = "alt1"; /* PMBSCCLK */
+		};
+
+		pmbscdat-grp0 {
+			pins = "pmbscdat";
+			function = "alt1"; /* PMBSCDAT */
+		};
+	};
+
+	/* SD */
+	sd_width1_pins: sd-width1-pins {
+		sdck-grp0 {
+			pins = "sdck";
+			function = "alt1"; /* SDCK */
+			bias-disable;
+		};
+
+		sdcmd-grp0 {
+			pins = "sdcmd";
+			function = "alt1"; /* SDCMD */
+			bias-pull-up;
+		};
+
+		sddat-grp0 {
+			pins = "sddat0";
+			function = "alt1"; /* SDDATx */
+			bias-pull-up;
+		};
+	};
+
+	sd_width4_pins: sd-width4-pins {
+		sdck-grp0 {
+			pins = "sdck";
+			function = "alt1"; /* SDCK */
+			bias-disable;
+		};
+
+		sdcmd-grp0 {
+			pins = "sdcmd";
+			function = "alt1"; /* SDCMD */
+			bias-pull-up;
+		};
+
+		sddat-grp0 {
+			pins = "sddat0", "sddat1", "sddat2", "sddat3";
+			function = "alt1"; /* SDDATx */
+			bias-pull-up;
+		};
+	};
+
+	/* SD1 */
+	sd1_width1_pins: sd1-width1-pins {
+		sd1ck-grp0 {
+			pins = "mmc1dat7";
+			function = "alt6"; /* SD1CK */
+			bias-disable;
+		};
+
+		sd1cmd-grp0 {
+			pins = "spi0txd";
+			function = "alt2"; /* SD1CMD */
+			bias-pull-up;
+		};
+
+		sd1dat0-grp0 {
+			pins = "mmc1dat5";
+			function = "alt6"; /* SD1DAT0 */
+			bias-pull-up;
+		};
+	};
+
+	sd1_width4_pins: sd1-width4-pins {
+		sd1ck-grp0 {
+			pins = "mmc1dat7";
+			function = "alt6"; /* SD1CK */
+			bias-disable;
+		};
+
+		sd1cmd-grp0 {
+			pins = "spi0txd";
+			function = "alt2"; /* SD1CMD */
+			bias-pull-up;
+		};
+
+		sd1dat0-grp0 {
+			pins = "mmc1dat5";
+			function = "alt6"; /* SD1DAT0 */
+			bias-pull-up;
+		};
+
+		sd1dat1-grp0 {
+			pins = "gpio93";
+			function = "alt1"; /* SD1DAT1 */
+			bias-pull-up;
+		};
+
+		sd1dat2-grp0 {
+			pins = "gpio94";
+			function = "alt1"; /* SD1DAT2 */
+			bias-pull-up;
+		};
+
+		sd1dat3-grp0 {
+			pins = "mmc1dat3";
+			function = "alt6"; /* SD1DAT3 */
+			bias-pull-up;
+		};
+	};
+
+	/* MMC0 */
+	mmc0_width1_pins: mmc0-width1-pins {
+		mmc0ck-grp0 {
+			pins = "mmc0ck";
+			function = "alt1"; /* MMC0CK */
+			bias-disable;
+		};
+
+		mmc0cmd-grp0 {
+			pins = "mmc0cmd";
+			function = "alt1"; /* MMC0CMD */
+			bias-pull-up;
+		};
+
+		mmc0dat-grp0 {
+			pins = "mmc0dat0";
+			function = "alt1"; /* MMC0DATx */
+			bias-pull-up;
+		};
+	};
+
+	mmc0_width4_pins: mmc0-width4-pins {
+		mmc0ck-grp0 {
+			pins = "mmc0ck";
+			function = "alt1"; /* MMC0CK */
+			bias-disable;
+		};
+
+		mmc0cmd-grp0 {
+			pins = "mmc0cmd";
+			function = "alt1"; /* MMC0CMD */
+			bias-pull-up;
+		};
+
+		mmc0dat-grp0 {
+			pins = "mmc0dat0", "mmc0dat1", "mmc0dat2", "mmc0dat3";
+			function = "alt1"; /* MMC0DATx */
+			bias-pull-up;
+		};
+	};
+
+	mmc0_width8_pins: mmc0-width8-pins {
+		mmc0ck-grp0 {
+			pins = "mmc0ck";
+			function = "alt1"; /* MMC0CK */
+			bias-disable;
+		};
+
+		mmc0cmd-grp0 {
+			pins = "mmc0cmd";
+			function = "alt1"; /* MMC0CMD */
+			bias-pull-up;
+		};
+
+		mmc0dat-grp0 {
+			pins = "mmc0dat0", "mmc0dat1", "mmc0dat2", "mmc0dat3",
+			       "mmc0dat4", "mmc0dat5", "mmc0dat6", "mmc0dat7";
+			function = "alt1"; /* MMC0DATx */
+			bias-pull-up;
+		};
+	};
+
+	/* MMC1 */
+	mmc1_width1_pins: mmc1-width1-pins {
+		mmc1ck-grp0 {
+			pins = "mmc1ck";
+			function = "alt1"; /* MMC1CK */
+			bias-disable;
+		};
+
+		mmc1cmd-grp0 {
+			pins = "mmc1cmd";
+			function = "alt1"; /* MMC1CMD */
+			bias-pull-up;
+		};
+
+		mmc1dat-grp0 {
+			pins = "mmc1dat0";
+			function = "alt1"; /* MMC1DATx */
+			bias-pull-up;
+		};
+	};
+
+	mmc1_width4_pins: mmc1-width4-pins {
+		mmc1ck-grp0 {
+			pins = "mmc1ck";
+			function = "alt1"; /* MMC1CK */
+			bias-disable;
+		};
+
+		mmc1cmd-grp0 {
+			pins = "mmc1cmd";
+			function = "alt1"; /* MMC1CMD */
+			bias-pull-up;
+		};
+
+		mmc1dat-grp0 {
+			pins = "mmc1dat0", "mmc1dat1", "mmc1dat2", "mmc1dat3";
+			function = "alt1"; /* MMC1DATx */
+			bias-pull-up;
+		};
+	};
+
+	mmc1_width8_pins: mmc1-width8-pins {
+		mmc1ck-grp0 {
+			pins = "mmc1ck";
+			function = "alt1"; /* MMC1CK */
+			bias-disable;
+		};
+
+		mmc1cmd-grp0 {
+			pins = "mmc1cmd";
+			function = "alt1"; /* MMC1CMD */
+			bias-pull-up;
+		};
+
+		mmc1dat-grp0 {
+			pins = "mmc1dat0", "mmc1dat1", "mmc1dat2", "mmc1dat3",
+			       "mmc1dat4", "mmc1dat5", "mmc1dat6", "mmc1dat7";
+			function = "alt1"; /* MMC1DATx */
+			bias-pull-up;
+		};
+	};
+};
