Merge tag 'at91-dt-6.1-2' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/dt

AT91 DT for v6.1 #2

It contains:
- new SAMA5D3 based board, namely SAMA5D3-EDS
- adjustments to pass the DT binding validations
- disable AES on some LAN966 based boards as they are reserverd by
  secure OS

* tag 'at91-dt-6.1-2' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  spi: dt-bindings: atmel,at91rm9200-spi: Add DMA related properties
  ARM: dts: at91: Add `atmel,usart-mode` required property to serial nodes
  ARM: dts: at91: sam9x60ek: Add DBGU compatibles to uart1
  ARM: dts: at91: sama7g5: Swap rx and tx for spi11
  dts: arm: at91: Add SAMA5D3-EDS Board
  dt-bindings: arm: at91: Add info on SAMA5D3-EDS
  ARM: dts: lan966x: disable aes

Link: https://lore.kernel.org/r/20220916105407.1287452-1-claudiu.beznea@microchip.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

21 files changed, 413 insertions, 4 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 595e870750cd..98ffdf299809 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -61,6 +61,7 @@ dtb-$(CONFIG_SOC_SAM_V7) += \
 	at91-sama5d2_icp.dtb \
 	at91-sama5d2_ptc_ek.dtb \
 	at91-sama5d2_xplained.dtb \
+	at91-sama5d3_eds.dtb \
 	at91-sama5d3_ksz9477_evb.dtb \
 	at91-sama5d3_xplained.dtb \
 	at91-dvk_som60.dtb \
diff --git a/arch/arm/boot/dts/at91-sam9x60ek.dts b/arch/arm/boot/dts/at91-sam9x60ek.dts
index 7ade9979e1c6..4ba52ba11dc6 100644
--- a/arch/arm/boot/dts/at91-sam9x60ek.dts
+++ b/arch/arm/boot/dts/at91-sam9x60ek.dts
@@ -258,8 +258,9 @@
 	status = "okay";
 
 	uart1: serial@200 {
-		compatible = "microchip,sam9x60-usart", "atmel,at91sam9260-usart";
+		compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 		reg = <0x200 0x200>;
+		atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 		interrupts = <14 IRQ_TYPE_LEVEL_HIGH 7>;
 		dmas = <&dma0
 			(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
diff --git a/arch/arm/boot/dts/at91-sama5d3_eds.dts b/arch/arm/boot/dts/at91-sama5d3_eds.dts
new file mode 100644
index 000000000000..c287b03d768b
--- /dev/null
+++ b/arch/arm/boot/dts/at91-sama5d3_eds.dts
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * at91-sama5d3_eds.dts - Device Tree file for the SAMA5D3 Ethernet
+ *    Development System board.
+ *
+ * Copyright (C) 2022 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Jerry Ray <jerry.ray@microchip.com>
+ */
+/dts-v1/;
+#include "sama5d36.dtsi"
+
+/ {
+	model = "SAMA5D3 Ethernet Development System";
+	compatible = "microchip,sama5d3-eds", "atmel,sama5d36",
+		     "atmel,sama5d3", "atmel,sama5";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_key_gpio>;
+
+		button-3 {
+			label = "PB_USER";
+			gpios = <&pioE 29 GPIO_ACTIVE_LOW>;
+			linux,code = <0x104>;
+			wakeup-source;
+		};
+	};
+
+	memory@20000000 {
+		reg = <0x20000000 0x10000000>;
+	};
+
+	vcc_3v3_reg: regulator-1 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	vcc_2v5_reg: regulator-2 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC_2V5";
+		regulator-min-microvolt = <2500000>;
+		regulator-max-microvolt = <2500000>;
+		regulator-always-on;
+		vin-supply = <&vcc_3v3_reg>;
+	};
+
+	vcc_1v8_reg: regulator-3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC_1V8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+		vin-supply = <&vcc_3v3_reg>;
+	};
+
+	vcc_1v2_reg: regulator-4 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC_1V2";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		regulator-always-on;
+	};
+
+	vcc_mmc0_reg: regulator-5 {
+		compatible = "regulator-fixed";
+		regulator-name = "mmc0-card-supply";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_vcc_mmc0_reg_gpio>;
+		gpio = <&pioE 2 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&can0 {
+	status = "okay";
+};
+
+&dbgu {
+	status = "okay";
+};
+
+&ebi {
+	pinctrl-0 = <&pinctrl_ebi_nand_addr>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	nand_controller: nand-controller {
+		status = "okay";
+
+		nand@3 {
+			reg = <0x3 0x0 0x2>;
+			atmel,rb = <0>;
+			nand-bus-width = <8>;
+			nand-ecc-mode = "hw";
+			nand-ecc-strength = <4>;
+			nand-ecc-step-size = <512>;
+			nand-on-flash-bbt;
+			label = "atmel_nand";
+
+			partitions {
+				compatible = "fixed-partitions";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				at91bootstrap@0 {
+					label = "at91bootstrap";
+					reg = <0x0 0x40000>;
+				};
+
+				bootloader@40000 {
+					label = "bootloader";
+					reg = <0x40000 0xc0000>;
+				};
+
+				bootloaderenvred@100000 {
+					label = "bootloader env redundant";
+					reg = <0x100000 0x40000>;
+				};
+
+				bootloaderenv@140000 {
+					label = "bootloader env";
+					reg = <0x140000 0x40000>;
+				};
+
+				dtb@180000 {
+					label = "device tree";
+					reg = <0x180000 0x80000>;
+				};
+
+				kernel@200000 {
+					label = "kernel";
+					reg = <0x200000 0x600000>;
+				};
+
+				rootfs@800000 {
+					label = "rootfs";
+					reg = <0x800000 0x0f800000>;
+				};
+			};
+		};
+	};
+};
+
+&i2c0 {
+	pinctrl-0 = <&pinctrl_i2c0_pu>;
+	status = "okay";
+};
+
+&i2c1 {
+	status = "okay";
+};
+
+&i2c2 {
+	pinctrl-0 = <&pinctrl_i2c2_pu>;
+	status = "okay";
+};
+
+&main_xtal {
+	clock-frequency = <12000000>;
+};
+
+&mmc0 {
+	pinctrl-0 = <&pinctrl_mmc0_clk_cmd_dat0 &pinctrl_mmc0_dat1_3
+		     &pinctrl_mmc0_dat4_7 &pinctrl_mmc0_cd>;
+	vmmc-supply = <&vcc_mmc0_reg>;
+	vqmmc-supply = <&vcc_3v3_reg>;
+	status = "okay";
+	slot@0 {
+		reg = <0>;
+		bus-width = <8>;
+		cd-gpios = <&pioE 0 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&pinctrl {
+	board {
+		pinctrl_i2c0_pu: i2c0-pu {
+			atmel,pins =
+				<AT91_PIOA 30 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
+				<AT91_PIOA 31 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
+		};
+
+		pinctrl_i2c2_pu: i2c2-pu {
+			atmel,pins =
+				<AT91_PIOA 18 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>,
+				<AT91_PIOA 19 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;
+		};
+
+		pinctrl_key_gpio: key-gpio-0 {
+			atmel,pins =
+				<AT91_PIOE 29 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;
+		};
+
+		pinctrl_mmc0_cd: mmc0-cd {
+			atmel,pins =
+				<AT91_PIOE 0 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;
+		};
+
+		/* Reserved for reset signal to the RGMII connector. */
+		pinctrl_rgmii_rstn: rgmii-rstn {
+			atmel,pins =
+				<AT91_PIOD 18 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;
+		};
+
+		/* Reserved for an interrupt line from the RMII and RGMII connectors. */
+		pinctrl_spi_irqn: spi-irqn {
+			atmel,pins =
+				<AT91_PIOB 28 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>;
+		};
+
+		pinctrl_spi0_cs: spi0-cs-default {
+			atmel,pins =
+				<AT91_PIOD 13 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
+				 AT91_PIOD 16 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+		};
+
+		pinctrl_spi1_cs: spi1-cs-default {
+			atmel,pins = <AT91_PIOC 25 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
+				      AT91_PIOC 28 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+		};
+
+		pinctrl_usba_vbus: usba-vbus {
+			atmel,pins =
+				<AT91_PIOE 9 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>;
+		};
+
+		pinctrl_usb_default: usb-default {
+			atmel,pins =
+				<AT91_PIOE 3 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
+				 AT91_PIOE 4 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+		};
+
+		/* Reserved for VBUS fault interrupt. */
+		pinctrl_vbusfault_irqn: vbusfault-irqn {
+			atmel,pins =
+				<AT91_PIOE 5 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>;
+		};
+
+		pinctrl_vcc_mmc0_reg_gpio: vcc-mmc0-reg-gpio-default {
+			atmel,pins = <AT91_PIOE 2 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;
+		};
+	};
+};
+
+&slow_xtal {
+	clock-frequency = <32768>;
+};
+
+&spi0 {
+	pinctrl-names = "default", "cs";
+	pinctrl-1 = <&pinctrl_spi0_cs>;
+	cs-gpios = <&pioD 13 0>, <0>, <0>, <&pioD 16 0>;
+	status = "okay";
+};
+
+&spi1 {
+	pinctrl-names = "default", "cs";
+	pinctrl-1 = <&pinctrl_spi1_cs>;
+	cs-gpios = <&pioC 25 0>, <0>, <0>, <&pioC 28 0>;
+	status = "okay";
+};
+
+&tcb0 {
+	timer0: timer@0 {
+		compatible = "atmel,tcb-timer";
+		reg = <0>;
+	};
+
+	timer1: timer@1 {
+		compatible = "atmel,tcb-timer";
+		reg = <1>;
+	};
+};
+
+&usb0 {	/* USB Device port with VBUS detection. */
+	atmel,vbus-gpio = <&pioE 9 GPIO_ACTIVE_HIGH>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usba_vbus>;
+	status = "okay";
+};
+
+&usb1 {	/* 3-port Host. First port is unused. */
+	atmel,vbus-gpio = <0
+			   &pioE 3 GPIO_ACTIVE_HIGH
+			   &pioE 4 GPIO_ACTIVE_HIGH
+			  >;
+	num-ports = <3>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usb_default>;
+	status = "okay";
+};
+
+&usb2 {
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/at91rm9200.dtsi b/arch/arm/boot/dts/at91rm9200.dtsi
index d1181ead18e5..7a113325abb9 100644
--- a/arch/arm/boot/dts/at91rm9200.dtsi
+++ b/arch/arm/boot/dts/at91rm9200.dtsi
@@ -13,6 +13,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -596,6 +597,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91rm9200-dbgu", "atmel,at91rm9200-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
@@ -607,6 +609,7 @@
 			usart0: serial@fffc0000 {
 				compatible = "atmel,at91rm9200-usart";
 				reg = <0xfffc0000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -620,6 +623,7 @@
 			usart1: serial@fffc4000 {
 				compatible = "atmel,at91rm9200-usart";
 				reg = <0xfffc4000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -633,6 +637,7 @@
 			usart2: serial@fffc8000 {
 				compatible = "atmel,at91rm9200-usart";
 				reg = <0xfffc8000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -646,6 +651,7 @@
 			usart3: serial@fffcc000 {
 				compatible = "atmel,at91rm9200-usart";
 				reg = <0xfffcc000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <23 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
diff --git a/arch/arm/boot/dts/at91sam9260.dtsi b/arch/arm/boot/dts/at91sam9260.dtsi
index 9d9820db9482..789fe356dbf6 100644
--- a/arch/arm/boot/dts/at91sam9260.dtsi
+++ b/arch/arm/boot/dts/at91sam9260.dtsi
@@ -11,6 +11,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -532,6 +533,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
@@ -543,6 +545,7 @@
 			usart0: serial@fffb0000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb0000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -556,6 +559,7 @@
 			usart1: serial@fffb4000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb4000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -569,6 +573,7 @@
 			usart2: serial@fffb8000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb8000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -582,6 +587,7 @@
 			usart3: serial@fffd0000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffd0000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <23 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -595,6 +601,7 @@
 			uart0: serial@fffd4000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffd4000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <24 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -608,6 +615,7 @@
 			uart1: serial@fffd8000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffd8000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <25 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
diff --git a/arch/arm/boot/dts/at91sam9261.dtsi b/arch/arm/boot/dts/at91sam9261.dtsi
index 259aca565305..ee0bd1aceb3f 100644
--- a/arch/arm/boot/dts/at91sam9261.dtsi
+++ b/arch/arm/boot/dts/at91sam9261.dtsi
@@ -9,6 +9,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -179,6 +180,7 @@
 			usart0: serial@fffb0000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb0000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -192,6 +194,7 @@
 			usart1: serial@fffb4000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb4000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -205,6 +208,7 @@
 			usart2: serial@fffb8000{
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb8000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -301,6 +305,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
diff --git a/arch/arm/boot/dts/at91sam9263.dtsi b/arch/arm/boot/dts/at91sam9263.dtsi
index c080df8c2312..3ce9ea987312 100644
--- a/arch/arm/boot/dts/at91sam9263.dtsi
+++ b/arch/arm/boot/dts/at91sam9263.dtsi
@@ -9,6 +9,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -540,6 +541,7 @@
 			dbgu: serial@ffffee00 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xffffee00 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
@@ -551,6 +553,7 @@
 			usart0: serial@fff8c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff8c000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -564,6 +567,7 @@
 			usart1: serial@fff90000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff90000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -577,6 +581,7 @@
 			usart2: serial@fff94000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff94000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <9 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
index 09794561c7ce..95f5d76234db 100644
--- a/arch/arm/boot/dts/at91sam9g45.dtsi
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -13,6 +13,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -675,6 +676,7 @@
 
 			dbgu: serial@ffffee00 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				reg = <0xffffee00 0x200>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
@@ -687,6 +689,7 @@
 			usart0: serial@fff8c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff8c000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -700,6 +703,7 @@
 			usart1: serial@fff90000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff90000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -713,6 +717,7 @@
 			usart2: serial@fff94000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff94000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <9 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -726,6 +731,7 @@
 			usart3: serial@fff98000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfff98000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <10 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
diff --git a/arch/arm/boot/dts/at91sam9n12.dtsi b/arch/arm/boot/dts/at91sam9n12.dtsi
index 556f35ce49e3..83114d26f10d 100644
--- a/arch/arm/boot/dts/at91sam9n12.dtsi
+++ b/arch/arm/boot/dts/at91sam9n12.dtsi
@@ -11,6 +11,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -593,6 +594,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
@@ -618,6 +620,7 @@
 			usart0: serial@f801c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf801c000 0x4000>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <5 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart0>;
@@ -629,6 +632,7 @@
 			usart1: serial@f8020000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8020000 0x4000>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart1>;
@@ -640,6 +644,7 @@
 			usart2: serial@f8024000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8024000 0x4000>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart2>;
@@ -651,6 +656,7 @@
 			usart3: serial@f8028000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8028000 0x4000>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart3>;
diff --git a/arch/arm/boot/dts/at91sam9rl.dtsi b/arch/arm/boot/dts/at91sam9rl.dtsi
index 12c634811820..364a2ff0a763 100644
--- a/arch/arm/boot/dts/at91sam9rl.dtsi
+++ b/arch/arm/boot/dts/at91sam9rl.dtsi
@@ -11,6 +11,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pwm/pwm.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -175,6 +176,7 @@
 			usart0: serial@fffb0000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb0000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -188,6 +190,7 @@
 			usart1: serial@fffb4000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb4000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -201,6 +204,7 @@
 			usart2: serial@fffb8000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffb8000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -214,6 +218,7 @@
 			usart3: serial@fffbc000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfffbc000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <9 IRQ_TYPE_LEVEL_HIGH 5>;
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
@@ -322,6 +327,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi
index ea3b11336c79..0c26c925761b 100644
--- a/arch/arm/boot/dts/at91sam9x5.dtsi
+++ b/arch/arm/boot/dts/at91sam9x5.dtsi
@@ -13,6 +13,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -674,6 +675,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
@@ -688,6 +690,7 @@
 			usart0: serial@f801c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf801c000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <5 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart0>;
@@ -702,6 +705,7 @@
 			usart1: serial@f8020000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8020000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart1>;
@@ -716,6 +720,7 @@
 			usart2: serial@f8024000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8024000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart2>;
@@ -775,6 +780,7 @@
 			uart0: serial@f8040000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8040000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <15 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart0>;
@@ -786,6 +792,7 @@
 			uart1: serial@f8044000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8044000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <16 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart1>;
diff --git a/arch/arm/boot/dts/at91sam9x5_usart3.dtsi b/arch/arm/boot/dts/at91sam9x5_usart3.dtsi
index 098d3fef5c37..a47c765e1b20 100644
--- a/arch/arm/boot/dts/at91sam9x5_usart3.dtsi
+++ b/arch/arm/boot/dts/at91sam9x5_usart3.dtsi
@@ -8,6 +8,7 @@
 
 #include <dt-bindings/pinctrl/at91.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	aliases {
@@ -44,6 +45,7 @@
 			usart3: serial@f8028000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8028000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_usart3>;
diff --git a/arch/arm/boot/dts/lan966x-pcb8290.dts b/arch/arm/boot/dts/lan966x-pcb8290.dts
index 2e091180a64c..77187f59f04d 100644
--- a/arch/arm/boot/dts/lan966x-pcb8290.dts
+++ b/arch/arm/boot/dts/lan966x-pcb8290.dts
@@ -21,6 +21,10 @@
 	};
 };
 
+&aes {
+	status = "disabled"; /* Reserved by secure OS */
+};
+
 &gpio {
 	miim_a_pins: mdio-pins {
 		/* MDC, MDIO */
diff --git a/arch/arm/boot/dts/lan966x-pcb8291.dts b/arch/arm/boot/dts/lan966x-pcb8291.dts
index 289a31649422..f4f054cdf2a8 100644
--- a/arch/arm/boot/dts/lan966x-pcb8291.dts
+++ b/arch/arm/boot/dts/lan966x-pcb8291.dts
@@ -53,6 +53,10 @@
 	};
 };
 
+&aes {
+	status = "disabled"; /* Reserved by secure OS */
+};
+
 &gpio {
 	fc3_b_pins: fc3-b-pins {
 		/* RX, TX */
diff --git a/arch/arm/boot/dts/lan966x-pcb8309.dts b/arch/arm/boot/dts/lan966x-pcb8309.dts
index cfd7c8933703..c436cd20d4b4 100644
--- a/arch/arm/boot/dts/lan966x-pcb8309.dts
+++ b/arch/arm/boot/dts/lan966x-pcb8309.dts
@@ -97,6 +97,10 @@
 	};
 };
 
+&aes {
+	status = "disabled"; /* Reserved by secure OS */
+};
+
 &flx3 {
 	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_USART>;
 	status = "okay";
diff --git a/arch/arm/boot/dts/sam9x60.dtsi b/arch/arm/boot/dts/sam9x60.dtsi
index d3f60f6a456d..8f5477e307dd 100644
--- a/arch/arm/boot/dts/sam9x60.dtsi
+++ b/arch/arm/boot/dts/sam9x60.dtsi
@@ -12,6 +12,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 #include <dt-bindings/mfd/atmel-flexcom.h>
 
 / {
@@ -583,6 +584,7 @@
 			dbgu: serial@fffff200 {
 				compatible = "microchip,sam9x60-dbgu", "microchip,sam9x60-usart", "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <47 IRQ_TYPE_LEVEL_HIGH 7>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
diff --git a/arch/arm/boot/dts/sama5d2.dtsi b/arch/arm/boot/dts/sama5d2.dtsi
index 2c50a021aa76..14c35c12a115 100644
--- a/arch/arm/boot/dts/sama5d2.dtsi
+++ b/arch/arm/boot/dts/sama5d2.dtsi
@@ -9,6 +9,7 @@
 #include <dt-bindings/dma/at91.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 #include <dt-bindings/iio/adc/at91-sama5d2_adc.h>
 
 / {
@@ -441,6 +442,7 @@
 			uart0: serial@f801c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf801c000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <24 IRQ_TYPE_LEVEL_HIGH 7>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
@@ -457,6 +459,7 @@
 			uart1: serial@f8020000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8020000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <25 IRQ_TYPE_LEVEL_HIGH 7>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
@@ -473,6 +476,7 @@
 			uart2: serial@f8024000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8024000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <26 IRQ_TYPE_LEVEL_HIGH 7>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
@@ -530,6 +534,7 @@
 				uart5: serial@200 {
 					compatible = "atmel,at91sam9260-usart";
 					reg = <0x200 0x200>;
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 19>;
 					clock-names = "usart";
@@ -600,6 +605,7 @@
 				uart6: serial@200 {
 					compatible = "atmel,at91sam9260-usart";
 					reg = <0x200 0x200>;
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					interrupts = <20 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 20>;
 					clock-names = "usart";
@@ -769,6 +775,7 @@
 			uart3: serial@fc008000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfc008000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <27 IRQ_TYPE_LEVEL_HIGH 7>;
 				dmas = <&dma1
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
@@ -785,6 +792,7 @@
 			uart4: serial@fc00c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfc00c000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
 					 AT91_XDMAC_DT_PERID(43))>,
@@ -810,6 +818,7 @@
 				uart7: serial@200 {
 					compatible = "atmel,at91sam9260-usart";
 					reg = <0x200 0x200>;
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					interrupts = <21 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 21>;
 					clock-names = "usart";
@@ -880,6 +889,7 @@
 				uart8: serial@200 {
 					compatible = "atmel,at91sam9260-usart";
 					reg = <0x200 0x200>;
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					interrupts = <22 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 22>;
 					clock-names = "usart";
@@ -951,6 +961,7 @@
 				uart9: serial@200 {
 					compatible = "atmel,at91sam9260-usart";
 					reg = <0x200 0x200>;
+					atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 					interrupts = <23 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 23>;
 					clock-names = "usart";
diff --git a/arch/arm/boot/dts/sama5d3.dtsi b/arch/arm/boot/dts/sama5d3.dtsi
index 2d0935ad2225..bde8e92d60bb 100644
--- a/arch/arm/boot/dts/sama5d3.dtsi
+++ b/arch/arm/boot/dts/sama5d3.dtsi
@@ -12,6 +12,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	#address-cells = <1>;
@@ -194,6 +195,7 @@
 			usart0: serial@f001c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf001c000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <12 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(3)>,
 				       <&dma0 2 (AT91_DMA_CFG_PER_ID(4) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
@@ -208,6 +210,7 @@
 			usart1: serial@f0020000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf0020000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <13 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(5)>,
 				       <&dma0 2 (AT91_DMA_CFG_PER_ID(6) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
@@ -222,6 +225,7 @@
 			uart0: serial@f0024000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf0024000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <16 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart0>;
@@ -356,6 +360,7 @@
 			usart2: serial@f8020000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8020000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <14 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma1 2 AT91_DMA_CFG_PER_ID(7)>,
 				       <&dma1 2 (AT91_DMA_CFG_PER_ID(8) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
@@ -370,6 +375,7 @@
 			usart3: serial@f8024000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8024000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <15 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma1 2 AT91_DMA_CFG_PER_ID(9)>,
 				       <&dma1 2 (AT91_DMA_CFG_PER_ID(10) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
@@ -464,6 +470,7 @@
 			dbgu: serial@ffffee00 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xffffee00 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <2 IRQ_TYPE_LEVEL_HIGH 7>;
 				dmas = <&dma1 2 AT91_DMA_CFG_PER_ID(13)>,
 				       <&dma1 2 (AT91_DMA_CFG_PER_ID(14) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
diff --git a/arch/arm/boot/dts/sama5d3_uart.dtsi b/arch/arm/boot/dts/sama5d3_uart.dtsi
index a3eaba995cf4..44d1173f2ffb 100644
--- a/arch/arm/boot/dts/sama5d3_uart.dtsi
+++ b/arch/arm/boot/dts/sama5d3_uart.dtsi
@@ -9,6 +9,7 @@
 #include <dt-bindings/pinctrl/at91.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	aliases {
@@ -39,6 +40,7 @@
 			uart0: serial@f0024000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf0024000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <16 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart0>;
@@ -50,6 +52,7 @@
 			uart1: serial@f8028000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8028000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <17 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart1>;
diff --git a/arch/arm/boot/dts/sama5d4.dtsi b/arch/arm/boot/dts/sama5d4.dtsi
index 1e5c01898ccf..af62157ae214 100644
--- a/arch/arm/boot/dts/sama5d4.dtsi
+++ b/arch/arm/boot/dts/sama5d4.dtsi
@@ -8,6 +8,7 @@
 
 #include <dt-bindings/clock/at91.h>
 #include <dt-bindings/dma/at91.h>
+#include <dt-bindings/mfd/at91-usart.h>
 #include <dt-bindings/pinctrl/at91.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
@@ -278,6 +279,7 @@
 			uart0: serial@f8004000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8004000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <27 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -437,6 +439,7 @@
 			usart0: serial@f802c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf802c000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -455,6 +458,7 @@
 			usart1: serial@f8030000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xf8030000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <7 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -490,6 +494,7 @@
 			uart1: serial@fc004000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfc004000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <28 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma0
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -508,6 +513,7 @@
 			usart2: serial@fc008000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfc008000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <29 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma1
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -526,6 +532,7 @@
 			usart3: serial@fc00c000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfc00c000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <30 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma1
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -544,6 +551,7 @@
 			usart4: serial@fc010000 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0xfc010000 0x100>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <31 IRQ_TYPE_LEVEL_HIGH 5>;
 				dmas = <&dma1
 					(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
@@ -770,6 +778,7 @@
 			dbgu: serial@fc069000 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfc069000 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <45 IRQ_TYPE_LEVEL_HIGH 7>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_dbgu>;
diff --git a/arch/arm/boot/dts/sama7g5.dtsi b/arch/arm/boot/dts/sama7g5.dtsi
index bb6d71e6dfeb..7bd8ae8e8d38 100644
--- a/arch/arm/boot/dts/sama7g5.dtsi
+++ b/arch/arm/boot/dts/sama7g5.dtsi
@@ -14,6 +14,7 @@
 #include <dt-bindings/clock/at91.h>
 #include <dt-bindings/dma/at91.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/mfd/at91-usart.h>
 
 / {
 	model = "Microchip SAMA7G5 family SoC";
@@ -603,6 +604,7 @@
 			uart0: serial@200 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0x200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 38>;
 				clock-names = "usart";
@@ -651,6 +653,7 @@
 			uart3: serial@200 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0x200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 41>;
 				clock-names = "usart";
@@ -694,6 +697,7 @@
 			uart4: serial@200 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0x200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 42>;
 				clock-names = "usart";
@@ -719,6 +723,7 @@
 			uart7: serial@200 {
 				compatible = "atmel,at91sam9260-usart";
 				reg = <0x200 0x200>;
+				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
 				interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 45>;
 				clock-names = "usart";
@@ -866,9 +871,9 @@
 				#address-cells = <1>;
 				#size-cells = <0>;
 				atmel,fifo-size = <32>;
-				dmas = <&dma0 AT91_XDMAC_DT_PERID(27)>,
-					    <&dma0 AT91_XDMAC_DT_PERID(28)>;
-				dma-names = "rx", "tx";
+				dmas = <&dma0 AT91_XDMAC_DT_PERID(28)>,
+					    <&dma0 AT91_XDMAC_DT_PERID(27)>;
+				dma-names = "tx", "rx";
 				status = "disabled";
 			};
 		};