diff --git a/arch/arm64/boot/dts/broadcom/Makefile b/arch/arm64/boot/dts/broadcom/Makefile
index 05d8c5ecf3b0..8b4591ddd27c 100644
--- a/arch/arm64/boot/dts/broadcom/Makefile
+++ b/arch/arm64/boot/dts/broadcom/Makefile
@@ -1,4 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
+
+# Enables support for device-tree overlays
+DTC_FLAGS := -@
+
 dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-400.dtb \
 			      bcm2711-rpi-4-b.dtb \
 			      bcm2711-rpi-cm4-io.dtb \
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm4908.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm4908.dtsi
index 457805efb385..f549bda8c48c 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm4908.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm4908.dtsi
@@ -64,6 +64,7 @@ cpu3: cpu@3 {
 		l2: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm4912.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm4912.dtsi
index 46aa8c0b7971..d658c81f7285 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm4912.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm4912.dtsi
@@ -52,6 +52,7 @@ B53_3: cpu@3 {
 		L2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm63146.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm63146.dtsi
index 7020f2e995e2..4f474d47022e 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm63146.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm63146.dtsi
@@ -36,6 +36,7 @@ B53_1: cpu@1 {
 		L2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm63158.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm63158.dtsi
index 6a0242cbea57..909f254dc47d 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm63158.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm63158.dtsi
@@ -52,6 +52,7 @@ B53_3: cpu@3 {
 		L2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm6813.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm6813.dtsi
index 1a12905266ef..685ae32951c9 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm6813.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm6813.dtsi
@@ -52,6 +52,7 @@ B53_3: cpu@3 {
 		L2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm6856.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm6856.dtsi
index f41ebc30666f..820553ce541b 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm6856.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm6856.dtsi
@@ -36,6 +36,7 @@ B53_1: cpu@1 {
 		L2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/bcmbca/bcm6858.dtsi b/arch/arm64/boot/dts/broadcom/bcmbca/bcm6858.dtsi
index fa2688f41f06..0eb93c298297 100644
--- a/arch/arm64/boot/dts/broadcom/bcmbca/bcm6858.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcmbca/bcm6858.dtsi
@@ -51,6 +51,7 @@ B53_3: cpu@3 {
 		L2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi b/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi
index e1b80e569cdf..9dcd25ec2c04 100644
--- a/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi
+++ b/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi
@@ -80,6 +80,7 @@ A57_3: cpu@3 {
 		CLUSTER0_L2: l2-cache@0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/broadcom/stingray/stingray-pinctrl.dtsi b/arch/arm64/boot/dts/broadcom/stingray/stingray-pinctrl.dtsi
index 56789ccf9454..46a827521921 100644
--- a/arch/arm64/boot/dts/broadcom/stingray/stingray-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/broadcom/stingray/stingray-pinctrl.dtsi
@@ -44,7 +44,7 @@ pinmux: pinmux@14029c {
 			compatible = "pinctrl-single";
 			reg = <0x0014029c 0x26c>;
 			#address-cells = <1>;
-			#size-cells = <1>;
+			#size-cells = <0>;
 			pinctrl-single,register-width = <32>;
 			pinctrl-single,function-mask = <0xf>;
 			pinctrl-single,gpio-range = <
@@ -56,14 +56,14 @@ range: gpio-range {
 			};
 
 			/* pinctrl functions */
-			tsio_pins: pinmux_gpio_14 {
+			tsio_pins: gpio-14-pins {
 				pinctrl-single,pins = <
 					0x038 MODE_NITRO /* tsio_0 */
 					0x03c MODE_NITRO /* tsio_1 */
 				>;
 			};
 
-			nor_pins: pinmux_pnor_adv_n {
+			nor_pins: pnor-adv-n-pins {
 				pinctrl-single,pins = <
 					0x0ac MODE_PNOR /* nand_ce1_n */
 					0x0b0 MODE_PNOR /* nand_ce0_n */
@@ -119,7 +119,7 @@ nor_pins: pinmux_pnor_adv_n {
 				>;
 			};
 
-			nand_pins: pinmux_nand_ce1_n {
+			nand_pins: nand-ce1-n-pins {
 				pinctrl-single,pins = <
 					0x0ac MODE_NAND /* nand_ce1_n */
 					0x0b0 MODE_NAND /* nand_ce0_n */
@@ -148,59 +148,59 @@ nand_pins: pinmux_nand_ce1_n {
 				>;
 			};
 
-			pwm0_pins: pinmux_pwm_0 {
+			pwm0_pins: pwm-0-pins {
 				pinctrl-single,pins = <
 					0x10c MODE_NITRO
 				>;
 			};
 
-			pwm1_pins: pinmux_pwm_1 {
+			pwm1_pins: pwm-1-pins {
 				pinctrl-single,pins = <
 					0x110 MODE_NITRO
 				>;
 			};
 
-			pwm2_pins: pinmux_pwm_2 {
+			pwm2_pins: pwm-2-pins {
 				pinctrl-single,pins = <
 					0x114 MODE_NITRO
 				>;
 			};
 
-			pwm3_pins: pinmux_pwm_3 {
+			pwm3_pins: pwm-3-pins {
 				pinctrl-single,pins = <
 					0x118 MODE_NITRO
 				>;
 			};
 
-			dbu_rxd_pins: pinmux_uart1_sin_nitro {
+			dbu_rxd_pins: uart1-sin-nitro-pins {
 				pinctrl-single,pins = <
 					0x11c MODE_NITRO /* dbu_rxd */
 					0x120 MODE_NITRO /* dbu_txd */
 				>;
 			};
 
-			uart1_pins: pinmux_uart1_sin_nand {
+			uart1_pins: uart1-sin-nand-pins {
 				pinctrl-single,pins = <
 					0x11c MODE_NAND /* uart1_sin */
 					0x120 MODE_NAND /* uart1_out */
 				>;
 			};
 
-			uart2_pins: pinmux_uart2_sin {
+			uart2_pins: uart2-sin-pins {
 				pinctrl-single,pins = <
 					0x124 MODE_NITRO /* uart2_sin */
 					0x128 MODE_NITRO /* uart2_out */
 				>;
 			};
 
-			uart3_pins: pinmux_uart3_sin {
+			uart3_pins: uart3-sin-pins {
 				pinctrl-single,pins = <
 					0x12c MODE_NITRO /* uart3_sin */
 					0x130 MODE_NITRO /* uart3_out */
 				>;
 			};
 
-			i2s_pins: pinmux_i2s_bitclk {
+			i2s_pins: i2s-bitclk-pins {
 				pinctrl-single,pins = <
 					0x134 MODE_NITRO /* i2s_bitclk */
 					0x138 MODE_NITRO /* i2s_sdout */
@@ -211,7 +211,7 @@ i2s_pins: pinmux_i2s_bitclk {
 				>;
 			};
 
-			qspi_pins: pinumx_qspi_hold_n {
+			qspi_pins: qspi-hold-n-pins {
 				pinctrl-single,pins = <
 					0x14c MODE_NAND /* qspi_hold_n */
 					0x150 MODE_NAND /* qspi_wp_n */
@@ -222,28 +222,28 @@ qspi_pins: pinumx_qspi_hold_n {
 				>;
 			};
 
-			mdio_pins: pinumx_ext_mdio {
+			mdio_pins: ext-mdio-pins {
 				pinctrl-single,pins = <
 					0x164 MODE_NITRO /* ext_mdio */
 					0x168 MODE_NITRO /* ext_mdc */
 				>;
 			};
 
-			i2c0_pins: pinmux_i2c0_sda {
+			i2c0_pins: i2c0-sda-pins {
 				pinctrl-single,pins = <
 					0x16c MODE_NITRO /* i2c0_sda */
 					0x170 MODE_NITRO /* i2c0_scl */
 				>;
 			};
 
-			i2c1_pins: pinmux_i2c1_sda {
+			i2c1_pins: i2c1-sda-pins {
 				pinctrl-single,pins = <
 					0x174 MODE_NITRO /* i2c1_sda */
 					0x178 MODE_NITRO /* i2c1_scl */
 				>;
 			};
 
-			sdio0_pins: pinmux_sdio0_cd_l {
+			sdio0_pins: sdio0-cd-l-pins {
 				pinctrl-single,pins = <
 					0x17c MODE_NITRO /* sdio0_cd_l */
 					0x180 MODE_NITRO /* sdio0_clk_sdcard */
@@ -262,7 +262,7 @@ sdio0_pins: pinmux_sdio0_cd_l {
 				>;
 			};
 
-			sdio1_pins: pinmux_sdio1_cd_l {
+			sdio1_pins: sdio1-cd-l-pins {
 				pinctrl-single,pins = <
 					0x1b4 MODE_NITRO /* sdio1_cd_l */
 					0x1b8 MODE_NITRO /* sdio1_clk_sdcard */
@@ -281,7 +281,7 @@ sdio1_pins: pinmux_sdio1_cd_l {
 				>;
 			};
 
-			spi0_pins: pinmux_spi0_sck_nand {
+			spi0_pins: spi0-sck-nand-pins {
 				pinctrl-single,pins = <
 					0x1ec MODE_NITRO /* spi0_sck */
 					0x1f0 MODE_NITRO /* spi0_rxd */
@@ -290,7 +290,7 @@ spi0_pins: pinmux_spi0_sck_nand {
 				>;
 			};
 
-			spi1_pins: pinmux_spi1_sck_nand {
+			spi1_pins: spi1-sck-nand-pins {
 				pinctrl-single,pins = <
 					0x1fc MODE_NITRO /* spi1_sck */
 					0x200 MODE_NITRO /* spi1_rxd */
@@ -299,14 +299,14 @@ spi1_pins: pinmux_spi1_sck_nand {
 				>;
 			};
 
-			nuart_pins: pinmux_uart0_sin_nitro {
+			nuart_pins: uart0-sin-nitro-pins {
 				pinctrl-single,pins = <
 					0x20c MODE_NITRO /* nuart_rxd */
 					0x210 MODE_NITRO /* nuart_txd */
 				>;
 			};
 
-			uart0_pins: pinumux_uart0_sin_nand {
+			uart0_pins: uart0-sin-nand-pins {
 				pinctrl-single,pins = <
 					0x20c MODE_NAND /* uart0_sin */
 					0x210 MODE_NAND /* uart0_out */
@@ -319,7 +319,7 @@ uart0_pins: pinumux_uart0_sin_nand {
 				>;
 			};
 
-			drdu2_pins: pinmux_drdu2_overcurrent {
+			drdu2_pins: drdu2-overcurrent-pins {
 				pinctrl-single,pins = <
 					0x22c MODE_NITRO /* drdu2_overcurrent */
 					0x230 MODE_NITRO /* drdu2_vbus_ppc */
@@ -328,7 +328,7 @@ drdu2_pins: pinmux_drdu2_overcurrent {
 				>;
 			};
 
-			drdu3_pins: pinmux_drdu3_overcurrent {
+			drdu3_pins: drdu3-overcurrent-pins {
 				pinctrl-single,pins = <
 					0x23c MODE_NITRO /* drdu3_overcurrent */
 					0x240 MODE_NITRO /* drdu3_vbus_ppc */
@@ -337,7 +337,7 @@ drdu3_pins: pinmux_drdu3_overcurrent {
 				>;
 			};
 
-			usb3h_pins: pinmux_usb3h_overcurrent {
+			usb3h_pins: usb3h-overcurrent-pins {
 				pinctrl-single,pins = <
 					0x24c MODE_NITRO /* usb3h_overcurrent */
 					0x250 MODE_NITRO /* usb3h_vbus_ppc */
diff --git a/arch/arm64/boot/dts/broadcom/stingray/stingray.dtsi b/arch/arm64/boot/dts/broadcom/stingray/stingray.dtsi
index 388424b3e1d3..7aece79bf882 100644
--- a/arch/arm64/boot/dts/broadcom/stingray/stingray.dtsi
+++ b/arch/arm64/boot/dts/broadcom/stingray/stingray.dtsi
@@ -109,21 +109,25 @@ cpu@301 {
 		CLUSTER0_L2: l2-cache@0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 
 		CLUSTER1_L2: l2-cache@100 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 
 		CLUSTER2_L2: l2-cache@200 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 
 		CLUSTER3_L2: l2-cache@300 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-unified;
 		};
 	};