Merge branch 'ap/MTX-4274' into '6'

mPower R.6.0: Merge all changes from 5.3.6 and 5.3.7 to mPower R.6.0

See merge request !18

15 files changed, 728 insertions, 605 deletions

diff --git a/recipes-bsp/at91bootstrap/at91bootstrap-3.8.12/0005-at91bootstrap-3.8-mtcdt.patch b/recipes-bsp/at91bootstrap/at91bootstrap-3.8.12/0005-at91bootstrap-3.8-mtcdt.patch
index 14f01eb..117f4be 100644
--- a/recipes-bsp/at91bootstrap/at91bootstrap-3.8.12/0005-at91bootstrap-3.8-mtcdt.patch
+++ b/recipes-bsp/at91bootstrap/at91bootstrap-3.8.12/0005-at91bootstrap-3.8-mtcdt.patch
@@ -1,7 +1,7 @@
 diff -Naru orig/board/at91sam9x5ek/at91sam9x5ek.c new/board/at91sam9x5ek/at91sam9x5ek.c
 --- orig/board/at91sam9x5ek/at91sam9x5ek.c	2020-09-10 16:30:43.653327254 -0500
 +++ new/board/at91sam9x5ek/at91sam9x5ek.c	2020-09-10 16:16:38.597352272 -0500
-@@ -56,6 +56,37 @@
+@@ -56,6 +56,47 @@
  	writel(0xFF, RTC_SCCR + AT91C_BASE_RTC);
  }
  
@@ -22,13 +22,23 @@ diff -Naru orig/board/at91sam9x5ek/at91sam9x5ek.c new/board/at91sam9x5ek/at91sam
 +		 * from loading.  Once the VID/PID is bad, a
 +		 * reboot will preserve the bad VID/PID, so
 +		 * a power cycle is then required.
++		 * PD16 and PD15 are the GPIO expander reset pins
++		 * for MTCDT 0.2, and Secure Element Reset and
++		 * AP2_TBD3 in MTCDT 0.1 and 0.0.  No one should be using
++		 * AP2_TBD3 in prior designs, and Secure Element
++		 * was never used/populated.
++		 * For the PCA9557, tw(rst) is listed as 6nS on page
++		 * 16 of Product Data Sheet Revision 7, 10 December 2013.
 +		 */
++		{"N_GPIO_EXP1_RESET",AT91C_PIN_PD(16), 0, PIO_DEFAULT, PIO_OUTPUT},
++		{"N_GPIO_EXP2_RESET",AT91C_PIN_PC(26), 0, PIO_DEFAULT, PIO_OUTPUT},
 +		{"GNSS-RESET",AT91C_PIN_PD(15), 0, PIO_PULLUP, PIO_OUTPUT},
-+		{"SECURE-RESET",AT91C_PIN_PD(16), 1, PIO_PULLUP, PIO_OUTPUT},
 +		{"MTQ-RESET",AT91C_PIN_PD(17), 1, PIO_PULLUP, PIO_OUTPUT},
 +		{"USBHUB-RESET",AT91C_PIN_PD(18), 1, PIO_PULLUP, PIO_OUTPUT},
 +		{"GNSS-INT",AT91C_PIN_PD(19), 1, PIO_PULLUP, PIO_OUTPUT},
 +		{"WIFI-BT-LPMODE",AT91C_PIN_PD(20), 0, PIO_PULLUP, PIO_INPUT},
++		{"N_GPIO_EXP1_RESET",AT91C_PIN_PD(16), 1, PIO_DEFAULT, PIO_OUTPUT},
++		{"N_GPIO_EXP2_RESET",AT91C_PIN_PC(26), 1, PIO_DEFAULT, PIO_OUTPUT},
 +		{(char *)0, 0, 0, PIO_DEFAULT, PIO_PERIPH_A},
 +        };
 +
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/defconfig b/recipes-kernel/linux/linux-at91-4.9.87/defconfig
index 10aae27..05971d9 100644
--- a/recipes-kernel/linux/linux-at91-4.9.87/defconfig
+++ b/recipes-kernel/linux/linux-at91-4.9.87/defconfig
@@ -1988,7 +1988,8 @@ CONFIG_GPIO_SYSFS=y
 # CONFIG_GPIO_ADNP is not set
 # CONFIG_GPIO_MAX7300 is not set
 # CONFIG_GPIO_MAX732X is not set
-# CONFIG_GPIO_PCA953X is not set
+CONFIG_GPIO_PCA953X=y
+# CONFIG_GPIO_PCA953X_IRQ is not set
 # CONFIG_GPIO_PCF857X is not set
 # CONFIG_GPIO_SX150X is not set
 # CONFIG_GPIO_TPIC2810 is not set
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-atmel-multidrop.patch b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-atmel-multidrop.patch
new file mode 100644
index 0000000..d04b13c
--- /dev/null
+++ b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-atmel-multidrop.patch
@@ -0,0 +1,49 @@
+ This patch was derived from the Vizzini driver and this patch:
+
+ https://www.spinics.net/lists/linux-serial/msg25999.html
+
+ Since all prior versions of MTCDT used the Vizzini driver,
+ the mapping of 5 bit serial to multidrop (9 bit serial) was
+ used.
+
+ The purpose of this patch is to reserve the Atmel 5 bit mode
+ for 9 bit usage on MTCDT MTAC-MFSER.
+===========================================================================================
+diff --git orig/drivers/tty/serial/atmel_serial.c new/drivers/tty/serial/atmel_serial.c
+index 1297853..cd7987b 100644
+--- orig/drivers/tty/serial/atmel_serial.c
++++ new/drivers/tty/serial/atmel_serial.c
+@@ -2073,7 +2073,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
+ {
+ 	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ 	unsigned long flags;
+-	unsigned int old_mode, mode, imr, quot, baud, div, cd, fp = 0;
++	unsigned int old_mode, mode, mdrop, imr, quot, baud, div, cd, fp = 0;
+ 
+ 	/* save the current mode register */
+ 	mode = old_mode = atmel_uart_readl(port, ATMEL_US_MR);
+@@ -2084,10 +2084,13 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
+ 
+ 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
+ 
++	mdrop = 0;
+ 	/* byte size */
+ 	switch (termios->c_cflag & CSIZE) {
+ 	case CS5:
+-		mode |= ATMEL_US_CHRL_5;
++		mode |= ATMEL_US_PAR_MULTI_DROP;
++		mdrop = ATMEL_US_SENDA;
++		printk(KERN_INFO "termios: Setting Atmel Multi-Drop serial");
+ 		break;
+ 	case CS6:
+ 		mode |= ATMEL_US_CHRL_6;
+@@ -2246,7 +2249,8 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
+ 
+ 	atmel_uart_writel(port, ATMEL_US_BRGR, quot);
+ 	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
+-	atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
++	atmel_uart_writel(port, ATMEL_US_CR,
++				mdrop | ATMEL_US_TXEN | ATMEL_US_RXEN);
+ 	atmel_port->tx_stopped = false;
+ 
+ 	/* restore interrupts */
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch
index 4da2559..d68cd0e 100644
--- a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch
+++ b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch
@@ -1,481 +1,3 @@
-diff -Naru orig/arch/arm/boot/dts/mtcdt.dts new/arch/arm/boot/dts/mtcdt.dts
---- orig/arch/arm/boot/dts/mtcdt.dts	1969-12-31 18:00:00.000000000 -0600
-+++ new/arch/arm/boot/dts/mtcdt.dts	2020-09-03 16:04:52.223278145 -0500
-@@ -0,0 +1,292 @@
-+/*
-+ * DTS file for Multi-Tech Systems MTCDT Hardware
-+ */
-+
-+/dts-v1/;
-+#include "at91sam9g25.dtsi"
-+#include "at91sam9x5ek.dtsi"
-+
-+
-+/ {
-+    model = "Multi-Tech Systems MTCDT";
-+    compatible = "atmel,at91sam9g25ek", "atmel,at91sam9x5ek", "atmel,at91sam9x5", "atmel,at91sam9";
-+
-+    ahb {
-+	apb {
-+
-+
-+	    macb0: ethernet@f802c000 {
-+		phy-mode = "rmii";
-+		status = "okay";
-+	    };
-+
-+            pinctrl@fffff400 {
-+		mmc0 {
-+		    pinctrl_board_mmc0: mmc0-board {
-+			atmel,pins =
-+			  <AT91_PIOA 1 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;  /* PA1 gpio SD card pin pull up and deglitch */
-+		   };
-+		};
-+		nand {
-+		    pinctrl_nand: nand-0 {
-+			atmel,pins =
-+			    <AT91_PIOD 0 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD0 periph A Read Enable */
-+			    AT91_PIOD 1 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD1 periph A Write Enable */
-+			    AT91_PIOD 2 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD2 periph A Address Latch Enable */
-+			    AT91_PIOD 3 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD3 periph A Command Latch Enable */
-+			    AT91_PIOD 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP	/* PD4 gpio Chip Enable pin pull_up */
-+			    AT91_PIOC 31 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP	/* PC31 gpio RDY/BUSY pin pull_up */
-+			    AT91_PIOD 6 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD6 periph A Data bit 0 */
-+			    AT91_PIOD 7 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD7 periph A Data bit 1 */
-+			    AT91_PIOD 8 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD8 periph A Data bit 2 */
-+			    AT91_PIOD 9 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD9 periph A Data bit 3 */
-+			    AT91_PIOD 10 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD10 periph A Data bit 4 */
-+			    AT91_PIOD 11 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD11 periph A Data bit 5 */
-+			    AT91_PIOD 12 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD12 periph A Data bit 6 */
-+			    AT91_PIOD 13 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;	/* PD13 periph A Data bit 7 */
-+		    };
-+
-+		    /delete-node/ nand_16bits-0;
-+                };
-+                mts-io {
-+		     pinctrl_mts_io_out: mts_io-0 {
-+                      atmel,pins =
-+                          <AT91_PIOD 14 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP    /* PD14 WiFi BT reset */
-+                          AT91_PIOD 16 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP     /* PD16 Secure reset */
-+                          AT91_PIOD 17 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP     /* PD17 MTQ reset */
-+                          AT91_PIOD 18 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD18 USB Hub reset */
-+                      output-high;
-+		    };
-+		    pinctrl_mts_io_in: mts_io-1 {
-+                      atmel,pins =
-+                          <AT91_PIOD 19 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP   /* PD19 GNSS Int */
-+                          AT91_PIOD 20 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD20 WiFi_BT_LPMode Input */
-+		    };
-+		    pinctrl_mts_io_gnss: mts_io-2 {
-+                      atmel,pins =
-+			   <AT91_PIOC 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP      /* PC16 ETH_NRST */
-+                          AT91_PIOD 15 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD15 N_GNSS_RESET */
-+                      output-low;
-+		    };
-+               };
-+
-+		mmc1 {
-+		    pinctrl_mmc1_slot0_clk_cmd_dat0: mmc1_slot0_clk_cmd_dat0-0 {
-+			atmel,pins =
-+			    <AT91_PIOA 13 AT91_PERIPH_B AT91_PINCTRL_NONE	/* PA13 periph B */
-+			    AT91_PIOA 12 AT91_PERIPH_B AT91_PINCTRL_PULL_UP	/* PA12 periph B with pullup */
-+			    AT91_PIOA 11 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;	/* PA11 periph B with pullup */
-+		    };
-+
-+		    pinctrl_mmc1_slot0_dat1_3: mmc1_slot0_dat1_3-0 {
-+			atmel,pins =
-+			    <AT91_PIOA 2 AT91_PERIPH_B AT91_PINCTRL_PULL_UP	/* PA2 periph B with pullup */
-+			    AT91_PIOA 3 AT91_PERIPH_B AT91_PINCTRL_PULL_UP	/* PA3 periph B with pullup */
-+			    AT91_PIOA 4 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;	/* PA4 periph B with pullup */
-+		    };
-+
-+		    /delete-node/ mmc1-board;
-+		};
-+            };
-+
-+	    rtc@fffffeb0 {
-+		status = "okay";
-+	    };
-+
-+			dbgu: serial@fffff200 {
-+				status = "okay";
-+				atmel,use-dma-rx;
-+				atmel,use-dma-tx;
-+			};
-+
-+            /* runs to Accessory Port 1 */
-+	    spi0: spi@f0000000 {
-+		status = "okay";
-+		cs-gpios = <&pioA 4 0>, <&pioA 2 0>, <&pioA 3 0>, <&pioA 5 0>;
-+
-+		ap1-adc@0 {
-+		    compatible = "mts-io-ap1-adc";
-+		    spi-max-frequency = <20000000>;
-+		    reg = <0>;
-+		};
-+		ap1-dout@1 {
-+		    compatible = "mts-io-ap1-dout";
-+		    spi-max-frequency = <1000000>;
-+		    reg = <1>;
-+		};
-+		ap1-spi@2 {
-+		    compatible = "mts,mtac";
-+		    spi-max-frequency = <2000000>;
-+			reg = <2>;
-+		};
-+		ap1-din@3 {
-+		    compatible = "mts-io-ap1-din";
-+		    spi-max-frequency = <1000000>;
-+		    reg = <3>;
-+		};
-+		/delete-node/ m25p80@0;
-+	    };
-+
-+	    /* runs to Accessory Port 2 */
-+	    spi1: spi@f0004000 {
-+		status = "okay";
-+
-+		cs-gpios = <&pioC 15 0>, <&pioC 16 0>, <&pioC 17 0>, <&pioC 18 0>;
-+
-+		ap2-adc@0 {
-+		    compatible = "mts-io-ap2-adc";
-+		    spi-max-frequency = <20000000>;
-+		    reg = <0>;
-+		};
-+		ap2-dout@1 {
-+		    compatible = "mts-io-ap2-dout";
-+		    spi-max-frequency = <1000000>;
-+		    reg = <1>;
-+		};
-+		ap2-spi@2 {
-+		    compatible = "mts,mtac";
-+		    spi-max-frequency = <2000000>;
-+			reg = <2>;
-+		};
-+		ap2-din@3 {
-+		    compatible = "mts-io-ap2-din";
-+		    spi-max-frequency = <1000000>;
-+		    reg = <3>;
-+		};
-+	    };
-+        };
-+
-+	nand0: nand@40000000 {
-+	    reg = < 0x40000000 0x10000000
-+		    0xffffe000 0x600		/* PMECC Registers */
-+		    0xffffe600 0x200		/* PMECC Error Location Registers */
-+		    0x00100000 0x100000		/* PMECC looup table in ROM code  */
-+		  >;
-+	    atmel,pmecc-lookup-table-offset = <0x8000 0x10000>;
-+	    gpios = <	&pioC 31 GPIO_ACTIVE_HIGH
-+			&pioD 4 GPIO_ACTIVE_HIGH
-+			0
-+		    >;
-+	    atmel,pmecc-cap = <4>;
-+	    atmel,nand-has-dma;
-+
-+	    nand@0 {
-+		label = "NANDFlash";
-+		reg = <0x0 0x10000000>;
-+	    };
-+	    at91bootstrap@0 {
-+		label = "at91bootstrap";
-+		reg = <0x0 0x40000>;
-+	    };
-+	    uboot@40000 {
-+		label = "u-Boot";
-+		reg = <0x40000 0x80000>;
-+	    };
-+	    ubootconfig0@c0000 {
-+		label = "u-Boot Config";
-+		reg = <0xc0000 0xa0000>;
-+	    };
-+	    ubootconfig1@160000 {
-+		label = "u-Boot Redundant Config";
-+		reg = <0x160000 0xa0000>;
-+	    };
-+	    uImage@200000 {
-+		label = "uImage";
-+		reg = <0x200000 0x600000>;
-+	    };
-+	    config0@800000 {
-+		label = "Config";
-+		reg = <0x800000 0x800000>;
-+	    };
-+	    config1@1000000 {
-+		label = "OEM Config";
-+		reg = <0x1000000 0x800000>;
-+	    };
-+	    rootfs@1800000 {
-+		label = "Rootfs";
-+		reg = <0x1800000 0x8000000>;
-+		};
-+		user@9800000 {
-+		label = "User data";
-+		reg = <0x9800000 0x6800000>;
-+		};
-+	};
-+    };
-+
-+    leds {
-+            compatible = "gpio-leds";
-+
-+            pa24 {
-+                    label = "led-status";
-+                    gpios = <&pioA 24 GPIO_ACTIVE_LOW>;
-+                    linux,default-trigger = "default-on";
-+            };
-+            pa25 {
-+                    label = "led-a";
-+                    gpios = <&pioA 25 GPIO_ACTIVE_LOW>;
-+            };
-+            pa26 {
-+                    label = "led-b";
-+                    gpios = <&pioA 26 GPIO_ACTIVE_LOW>;
-+            };
-+            pa27 {
-+                    label = "led-c";
-+                    gpios = <&pioA 27 GPIO_ACTIVE_LOW>;
-+            };
-+            pa28 {
-+                    label = "led-d";
-+                    gpios = <&pioA 28 GPIO_ACTIVE_LOW>;
-+            };
-+    };
-+
-+    /* GPS-PPS input on AP1 */
-+    pps-0 {
-+            compatible = "pps-gpio";
-+            gpios = <&pioA 29 0>;
-+            capture-clear;
-+            status = "okay";
-+    };
-+
-+
-+    i2c-gpio-0 {
-+	status = "okay";
-+
-+	id_eeprom@56 {
-+	    compatible = "atmel,24c04";
-+	    reg = <0x56>;
-+	    pagesize = <16>;
-+            status = "okay";
-+	};
-+	board_temp@48 {
-+	    compatible = "ti,tmp102";
-+	    reg = <0x48>;
-+            status = "okay";
-+	    /* tempsensor_alert line running to pin PC19 on processor
-+	       set up an interrupt for this? */
-+	};
-+    };
-+    i2c-gpio-1 {
-+	status = "okay";
-+
-+	ap1_eeprom@50 {
-+	    compatible = "atmel,24c04";
-+	    reg = <0x50>;
-+	    pagesize = <16>;
-+            status = "okay";
-+	};
-+	ap2_eeprom@52 {
-+	    compatible = "atmel,24c04";
-+	    reg = <0x52>;
-+	    pagesize = <16>;
-+            status = "okay";
-+	};
-+    };
-+    mts-io-0 {
-+	status = "okay";
-+	compatible = "mts,mts-io";
-+	pinctrl-names = "default";
-+	pinctrl-0 = <&pinctrl_mts_io_out>;
-+	pinctrl-1 = <&pinctrl_mts_io_in>;
-+	pinctrl-2 = <&pinctrl_mts_io_gnss>;
-+    };
-+};
-Index: linux-4.9/arch/arm/boot/dts/at91sam9x5cm.dtsi
-===================================================================
-diff -aNru linux-4.9-orig/arch/arm/boot/dts/at91sam9x5cm.dtsi linux-4.9/arch/arm/boot/dts/at91sam9x5cm.dtsi
---- linux-4.9-orig/arch/arm/boot/dts/at91sam9x5cm.dtsi	2018-11-28 18:38:25.509563104 -0600
-+++ linux-4.9/arch/arm/boot/dts/at91sam9x5cm.dtsi	2018-11-28 18:39:16.213561602 -0600
-@@ -43,48 +43,8 @@
- 			atmel,has-pmecc;	/* Enable PMECC */
- 			atmel,pmecc-cap = <2>;
- 			atmel,pmecc-sector-size = <512>;
--			nand-on-flash-bbt;
-+			/* nand-on-flash-bbt; */
- 			status = "okay";
--
--			at91bootstrap@0 {
--				label = "at91bootstrap";
--				reg = <0x0 0x40000>;
--			};
--
--			uboot@40000 {
--				label = "u-boot";
--				reg = <0x40000 0x80000>;
--			};
--
--			ubootenv@c0000 {
--				label = "U-Boot Env";
--				reg = <0xc0000 0x140000>;
--			};
--
--			kernel@200000 {
--				label = "kernel";
--				reg = <0x200000 0x600000>;
--			};
--
--			rootfs@800000 {
--				label = "rootfs";
--				reg = <0x800000 0x1f800000>;
--			};
--		};
--	};
--
--	leds {
--		compatible = "gpio-leds";
--
--		pb18 {
--			label = "pb18";
--			gpios = <&pioB 18 GPIO_ACTIVE_LOW>;
--			linux,default-trigger = "heartbeat";
--		};
--
--		pd21 {
--			label = "pd21";
--			gpios = <&pioD 21 GPIO_ACTIVE_HIGH>;
- 		};
- 	};
- 
-@@ -96,5 +56,4 @@
- 		pinctrl-0 = <&pinctrl_1wire_cm>;
- 		status = "okay";
- 	};
--
- };
-Index: linux-4.9/arch/arm/boot/dts/at91sam9x5ek.dtsi
-===================================================================
-diff -aNru linux-4.9-orig/arch/arm/boot/dts/at91sam9x5ek.dtsi linux-4.9/arch/arm/boot/dts/at91sam9x5ek.dtsi
---- linux-4.9-orig/arch/arm/boot/dts/at91sam9x5ek.dtsi	2018-11-28 17:48:21.157652047 -0600
-+++ linux-4.9/arch/arm/boot/dts/at91sam9x5ek.dtsi	2018-11-28 17:49:54.793649275 -0600
-@@ -25,23 +25,11 @@
- 					&pinctrl_mmc0_slot0_clk_cmd_dat0
- 					&pinctrl_mmc0_slot0_dat1_3>;
- 				status = "okay";
-+                                /* external micro SD slot */
- 				slot@0 {
- 					reg = <0>;
- 					bus-width = <4>;
--					cd-gpios = <&pioD 15 GPIO_ACTIVE_HIGH>;
--				};
--			};
--
--			mmc1: mmc@f000c000 {
--				pinctrl-0 = <
--					&pinctrl_board_mmc1
--					&pinctrl_mmc1_slot0_clk_cmd_dat0
--					&pinctrl_mmc1_slot0_dat1_3>;
--				status = "okay";
--				slot@0 {
--					reg = <0>;
--					bus-width = <4>;
--					cd-gpios = <&pioD 14 GPIO_ACTIVE_HIGH>;
-+					cd-gpios = <&pioA 1 GPIO_ACTIVE_HIGH>;
- 				};
- 			};
- 
-@@ -49,7 +37,7 @@
- 				status = "okay";
- 			};
- 
--			usart0: serial@f801c000 {
-+			uart0: serial@f8040000 {
- 				atmel,use-dma-rx;
- 				atmel,use-dma-tx;
- 				status = "okay";
-@@ -58,25 +46,12 @@
- 			usb2: gadget@f803c000 {
- 				pinctrl-names = "default";
- 				pinctrl-0 = <&pinctrl_board_usb2>;
--				atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;
--				status = "okay";
--			};
--
--			i2c0: i2c@f8010000 {
--				status = "okay";
--
--				wm8731: wm8731@1a {
--					compatible = "wm8731";
--					reg = <0x1a>;
--				};
--			};
--
--			adc0: adc@f804c000 {
--				atmel,adc-ts-wires = <4>;
--				atmel,adc-ts-pressure-threshold = <10000>;
-+				/* atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;		mtcdt: no vbus-gpio */
- 				status = "okay";
- 			};
- 
-+                        /* A/D convertor is unusable on Conduit */
-+                        
- 			pinctrl@fffff400 {
- 				camera_sensor {
- 					pinctrl_pck0_as_isi_mck: pck0_as_isi_mck-0 {
-@@ -118,7 +93,7 @@
- 			};
- 
- 			spi0: spi@f0000000 {
--				status = "disabled";	/* conflict with mmc1 */
-+                                status = "okay";
- 				cs-gpios = <&pioA 14 0>, <0>, <0>, <0>;
- 				m25p80@0 {
- 					compatible = "atmel,at25df321a";
-@@ -131,37 +106,20 @@
- 				status = "okay";
- 			};
- 
--			ssc0: ssc@f0010000 {
--				status = "okay";
--			};
- 		};
- 
- 		usb0: ohci@00600000 {
- 			status = "okay";
- 			num-ports = <3>;
--			atmel,vbus-gpio = <0 /* &pioD 18 GPIO_ACTIVE_LOW *//* Activate to have access to port A */
--					   &pioD 19 GPIO_ACTIVE_LOW
--					   &pioD 20 GPIO_ACTIVE_LOW
--					  >;
-+			//mtcdt: no vbus-gpio
-+			// atmel,vbus-gpio = <0 /* &pioD 18 GPIO_ACTIVE_LOW *//* Activate to have access to port A */
-+			//		   &pioD 19 GPIO_ACTIVE_LOW
-+			//		   &pioD 20 GPIO_ACTIVE_LOW
-+			//		  >;
- 		};
- 
- 		usb1: ehci@00700000 {
- 			status = "okay";
- 		};
- 	};
--
--	sound {
--		compatible = "atmel,sam9x5-wm8731-audio";
--
--		atmel,model = "wm8731 @ AT91SAM9X5EK";
--
--		atmel,audio-routing =
--			"Headphone Jack", "RHPOUT",
--			"Headphone Jack", "LHPOUT",
--			"LLINEIN", "Line In Jack",
--			"RLINEIN", "Line In Jack";
--
--		atmel,ssc-controller = <&ssc0>;
--		atmel,audio-codec = <&wm8731>;
--	};
- };
 diff -aNru linux-4.9-orig/arch/arm/boot/dts/Makefile linux-4.9/arch/arm/boot/dts/Makefile
 --- linux-4.9-orig/arch/arm/boot/dts/Makefile	2018-11-28 17:48:26.197651897 -0600
 +++ linux-4.9/arch/arm/boot/dts/Makefile	2018-11-28 17:49:26.441650114 -0600
@@ -489,70 +11,3 @@ diff -aNru linux-4.9-orig/arch/arm/boot/dts/Makefile linux-4.9/arch/arm/boot/dts
  dtb-$(CONFIG_SOC_SAM_V7) += \
  	at91-kizbox2.dtb \
  	at91-sama5d2_ptc_ek.dtb \
-Index: linux-4.9/arch/arm/boot/dts/at91sam9x5.dtsi
-===================================================================
-diff -aNru linux-4.9-orig/arch/arm/boot/dts/at91sam9x5.dtsi linux-4.9/arch/arm/boot/dts/at91sam9x5.dtsi
---- linux-4.9-orig/arch/arm/boot/dts/at91sam9x5.dtsi	2018-11-28 17:20:48.149700984 -0600
-+++ linux-4.9/arch/arm/boot/dts/at91sam9x5.dtsi	2018-11-28 17:27:35.665688919 -0600
-@@ -32,9 +32,6 @@
- 		gpio3 = &pioD;
- 		tcb0 = &tcb0;
- 		tcb1 = &tcb1;
--		i2c0 = &i2c0;
--		i2c1 = &i2c1;
--		i2c2 = &i2c2;
- 		ssc0 = &ssc0;
- 		pwm0 = &pwm0;
- 	};
-@@ -963,50 +960,7 @@
- 				status = "disabled";
- 			};
- 
--			i2c0: i2c@f8010000 {
--				compatible = "atmel,at91sam9x5-i2c";
--				reg = <0xf8010000 0x100>;
--				interrupts = <9 IRQ_TYPE_LEVEL_HIGH 6>;
--				dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(7)>,
--				       <&dma0 1 AT91_DMA_CFG_PER_ID(8)>;
--				dma-names = "tx", "rx";
--				#address-cells = <1>;
--				#size-cells = <0>;
--				pinctrl-names = "default";
--				pinctrl-0 = <&pinctrl_i2c0>;
--				clocks = <&twi0_clk>;
--				status = "disabled";
--			};
--
--			i2c1: i2c@f8014000 {
--				compatible = "atmel,at91sam9x5-i2c";
--				reg = <0xf8014000 0x100>;
--				interrupts = <10 IRQ_TYPE_LEVEL_HIGH 6>;
--				dmas = <&dma1 1 AT91_DMA_CFG_PER_ID(5)>,
--				       <&dma1 1 AT91_DMA_CFG_PER_ID(6)>;
--				dma-names = "tx", "rx";
--				#address-cells = <1>;
--				#size-cells = <0>;
--				pinctrl-names = "default";
--				pinctrl-0 = <&pinctrl_i2c1>;
--				clocks = <&twi1_clk>;
--				status = "disabled";
--			};
--
--			i2c2: i2c@f8018000 {
--				compatible = "atmel,at91sam9x5-i2c";
--				reg = <0xf8018000 0x100>;
--				interrupts = <11 IRQ_TYPE_LEVEL_HIGH 6>;
--				dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(9)>,
--				       <&dma0 1 AT91_DMA_CFG_PER_ID(10)>;
--				dma-names = "tx", "rx";
--				#address-cells = <1>;
--				#size-cells = <0>;
--				pinctrl-names = "default";
--				pinctrl-0 = <&pinctrl_i2c2>;
--				clocks = <&twi2_clk>;
--				status = "disabled";
--			};
-+			/* /delete_node/ command does not work. */
- 
- 			uart0: serial@f8040000 {
- 				compatible = "atmel,at91sam9260-usart";
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/mt-at91.h b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/mt-at91.h
new file mode 100644
index 0000000..36fba62
--- /dev/null
+++ b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/mt-at91.h
@@ -0,0 +1,19 @@
+#ifndef _DT_BINDINGS_GPIO_MT_AT91_H
+#define _DT_BINDINGS_GPIO_MT_AT91_H
+/*
+ * Device tree explicit phandles
+ * for overlays. First four are AT91.
+ * Kernel must know about this to
+ * build the device tree. Overlay
+ * recipe needs this to find the
+ * GPIO stanza phandle.
+ */
+
+#define GPIO0_PH 0xffff0000
+#define GPIO1_PH 0xffff0001
+#define GPIO2_PH 0xffff0002
+#define GPIO3_PH 0xffff0003
+#define GPIO4_PCA9557_PH 0xffff0004
+#define GPIO5_PCA9557_PH 0xffff0005
+
+#endif
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/mtcdt.dts b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/mtcdt.dts
new file mode 100644
index 0000000..f485baa
--- /dev/null
+++ b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/mtcdt.dts
@@ -0,0 +1,441 @@
+/*
+ * DTS file for Multi-Tech Systems MTCDT Hardware
+ */
+
+/dts-v1/;
+#include "at91sam9g25.dtsi"
+#include "at91sam9x5ek.dtsi"
+#include <dt-bindings/gpio/mt-at91.h>
+
+
+/ {
+    model = "Multi-Tech Systems MTCDT";
+    compatible = "atmel,at91sam9g25ek", "atmel,at91sam9x5ek", "atmel,at91sam9x5", "atmel,at91sam9";
+
+    aliases {
+        /delete-property/ i2c0;
+        /delete-property/ i2c1;
+        /delete-property/ i2c2;
+        /delete-property/ ssc0;
+        // serial2, usart1 is AP1 serial
+        serial4 = &usart3; // AP2 serial
+        serial5 = &uart0;  // GNSS on MTCDT-0.2
+        /delete-property/ serial1; // usart0
+        /delete-property/ serial3; // usart2
+    };
+
+    /delete-node/ 1wire_cm;
+    ahb {
+	apb {
+	    /delete-node/ i2c@f8010000;
+	    /delete-node/ i2c@f8014000;
+	    /delete-node/ i2c@f8018000;
+	    /delete-node/ mmc@f000c000;
+	    /delete-node/ adc@f804c000;
+	    /delete-node/ ssc@f0010000;
+	    /delete-node/ serial@f801c000;
+	    macb0: ethernet@f802c000 {
+		phy-mode = "rmii";
+		status = "okay";
+	    };
+
+            pinctrl@fffff400 {
+                /delete-node/ 1wire_cm;
+                usart1 {
+                    /delete-node/ usart1_sck-0;
+                    pinctrl_usart1_rng: usart1_rng-0 {
+			atmel,pins = <AT91_PIOA 27 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+                    };
+                    pinctrl_usart1_dcd: usart1_dcd-0 {
+			atmel,pins = <AT91_PIOA 26 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+                    };
+                    pinctrl_usart1_dtr: usart1_dtr-0 {
+			atmel,pins = <AT91_PIOA 25 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+                    };
+                };
+                usart3 {
+                    /delete-node/ usart3_sck-0;
+                    pinctrl_usart3_rng: usart3_rng-0 {
+			atmel,pins = <AT91_PIOC 14 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+                    };
+                    pinctrl_usart3_dcd: usart3_dcd-0 {
+			atmel,pins = <AT91_PIOC 13 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+                    };
+                    pinctrl_usart3_dtr: usart3_dtr-0 {
+			atmel,pins = <AT91_PIOC 12 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+                    };
+                };
+
+		mmc0 {
+		    pinctrl_board_mmc0: mmc0-board {
+			atmel,pins =
+			  <AT91_PIOA 1 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;  /* PA1 gpio SD card pin pull up and deglitch */
+		   };
+		   /* /delete-property/ cd-gpios; */
+		};
+		/delete-node/ mmc@f000c000;
+
+		nand {
+		    pinctrl_nand: nand-0 {
+			atmel,pins =
+			    <AT91_PIOD 0 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD0 periph A Read Enable */
+			    AT91_PIOD 1 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD1 periph A Write Enable */
+			    AT91_PIOD 2 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD2 periph A Address Latch Enable */
+			    AT91_PIOD 3 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD3 periph A Command Latch Enable */
+			    AT91_PIOD 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP	/* PD4 gpio Chip Enable pin pull_up */
+			    AT91_PIOC 31 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP	/* PC31 gpio RDY/BUSY pin pull_up */
+			    AT91_PIOD 6 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD6 periph A Data bit 0 */
+			    AT91_PIOD 7 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD7 periph A Data bit 1 */
+			    AT91_PIOD 8 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD8 periph A Data bit 2 */
+			    AT91_PIOD 9 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD9 periph A Data bit 3 */
+			    AT91_PIOD 10 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD10 periph A Data bit 4 */
+			    AT91_PIOD 11 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD11 periph A Data bit 5 */
+			    AT91_PIOD 12 AT91_PERIPH_A AT91_PINCTRL_PULL_UP	/* PD12 periph A Data bit 6 */
+			    AT91_PIOD 13 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;	/* PD13 periph A Data bit 7 */
+		    };
+
+		    /delete-node/ nand_16bits-0;
+                };
+                mts-io {
+		     pinctrl_mts_io_out: mts_io-0 {
+                      // gpio4 and gpio5 are reset in at91bootstrap. They should not be touched in Linux.
+                      atmel,pins =
+                          <AT91_PIOD 14 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))    /* PD14 WiFi BT reset */
+                          AT91_PIOD 16 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))     /* PD16 Secure reset or gpio4 reset */
+                          AT91_PIOD 17 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))     /* PD17 MTQ reset */
+                          AT91_PIOD 18 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))>;   /* PD18 USB Hub reset */
+                      output-high; // ignored by at91_pinctrl
+		    };
+		    pinctrl_mts_io_in: mts_io-1 {
+                      atmel,pins =
+                          <AT91_PIOD 19 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP   /* PD19 GNSS Int */
+                          AT91_PIOD 20 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD20 WiFi_BT_LPMode Input */
+		    };
+		    // GNSS kept in reset to prevent EXAR from hanging
+		    pinctrl_mts_io_gnss: mts_io-2 {
+                      atmel,pins =
+			<AT91_PIOC 4 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(0))     /* PC16 ETH_NRST */
+                        AT91_PIOD 15 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(0))>;   /* PD15 N_GNSS_RESET */
+                      output-low; // ignored by at91_pinctrl
+		    };
+               };
+
+		mmc1 {
+		    pinctrl_mmc1_slot0_clk_cmd_dat0: mmc1_slot0_clk_cmd_dat0-0 {
+			atmel,pins =
+			    <AT91_PIOA 13 AT91_PERIPH_B AT91_PINCTRL_NONE	/* PA13 periph B */
+			    AT91_PIOA 12 AT91_PERIPH_B AT91_PINCTRL_PULL_UP	/* PA12 periph B with pullup */
+			    AT91_PIOA 11 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;	/* PA11 periph B with pullup */
+		    };
+
+		    pinctrl_mmc1_slot0_dat1_3: mmc1_slot0_dat1_3-0 {
+			atmel,pins =
+			    <AT91_PIOA 2 AT91_PERIPH_B AT91_PINCTRL_PULL_UP	/* PA2 periph B with pullup */
+			    AT91_PIOA 3 AT91_PERIPH_B AT91_PINCTRL_PULL_UP	/* PA3 periph B with pullup */
+			    AT91_PIOA 4 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;	/* PA4 periph B with pullup */
+		    };
+
+		    /delete-node/ mmc1-board;
+		};
+            };
+
+	    rtc@fffffeb0 {
+		status = "okay";
+	    };
+
+            dbgu: serial@fffff200 {
+                    status = "okay";
+                    atmel,use-dma-rx;
+                    atmel,use-dma-tx;
+            };
+            /* runs to Accessory Port 1 */
+	    spi0: spi@f0000000 {
+		/delete-node/ m25p80@0;
+	    };
+
+#ifdef NO_OVERLAY
+		status = "disabled";
+                // A5->A28 for MTCDT 0.2
+		// cs-gpios = <&pioA 4 0>, <&pioA 2 0>, <&pioA 3 0>, <&pioA 5 0>;
+		ap1-adc@0 {
+		    spi-max-frequency = <20000000>;
+		    reg = <0>;
+		};
+		ap1-dout@1 {
+		    spi-max-frequency = <1000000>;
+		    reg = <1>;
+		};
+		ap1-spi@2 {
+		    spi-max-frequency = <2000000>;
+			reg = <2>;
+		};
+		ap1-din@3 {
+		    spi-max-frequency = <1000000>;
+		    reg = <3>;
+		};
+	    };
+
+	    /* runs to Accessory Port 2 */
+	    spi1: spi@f0004000 {
+		status = "disabled";
+
+		cs-gpios = <&pioC 15 0>, <&pioC 16 0>, <&pioC 17 0>, <&pioC 18 0>;
+
+		ap2-adc@0 {
+		    compatible = "mts-io-ap2-adc";
+		    spi-max-frequency = <20000000>;
+		    reg = <0>;
+		};
+		ap2-dout@1 {
+		    compatible = "mts-io-ap2-dout";
+		    spi-max-frequency = <1000000>;
+		    reg = <1>;
+		};
+		ap2-spi@2 {
+		    compatible = "mts,mtac";
+		    spi-max-frequency = <2000000>;
+			reg = <2>;
+		};
+		ap2-din@3 {
+		    compatible = "mts-io-ap2-din";
+		    spi-max-frequency = <1000000>;
+		    reg = <3>;
+		};
+	    };
+#endif // NO_OVERLAY
+        };
+
+	nand0: nand@40000000 {
+	    /delete-property/ nand-on-flash-bbt;
+	    reg = < 0x40000000 0x10000000
+		    0xffffe000 0x600		/* PMECC Registers */
+		    0xffffe600 0x200		/* PMECC Error Location Registers */
+		    0x00100000 0x100000		/* PMECC looup table in ROM code  */
+		  >;
+	    atmel,pmecc-lookup-table-offset = <0x8000 0x10000>;
+	    gpios = <	&pioC 31 GPIO_ACTIVE_HIGH
+			&pioD 4 GPIO_ACTIVE_HIGH
+			0
+		    >;
+	    atmel,pmecc-cap = <4>;
+	    atmel,nand-has-dma;
+
+	    /* To ensure correct partition ordering, we must delete
+	     * at91sam9x5cm.dtsi partitions and not use the same names
+	     * for the stanzas. */
+	    /delete-node/ at91bootstrap@0;
+	    /delete-node/ uboot@40000;
+	    /delete-node/ ubootenv@c0000;
+	    /delete-node/ kernel@200000;
+	    /delete-node/ rootfs@800000;
+
+	    nand@0 {
+		label = "NANDFlash";
+		reg = <0x0 0x10000000>;
+	    };
+	    at91bootstrapMT@0 {
+		label = "at91bootstrap";
+		reg = <0x0 0x40000>;
+	    };
+	    ubootMT@40000 {
+		label = "u-Boot";
+		reg = <0x40000 0x80000>;
+	    };
+	    ubootconfig0@c0000 {
+		label = "u-Boot Config";
+		reg = <0xc0000 0xa0000>;
+	    };
+	    ubootconfig1@160000 {
+		label = "u-Boot Redundant Config";
+		reg = <0x160000 0xa0000>;
+	    };
+	    uImage@200000 {
+		label = "uImage";
+		reg = <0x200000 0x600000>;
+	    };
+	    config0@800000 {
+		label = "Config";
+		reg = <0x800000 0x800000>;
+	    };
+	    config1@1000000 {
+		label = "OEM Config";
+		reg = <0x1000000 0x800000>;
+	    };
+	    rootfs@1800000 {
+		label = "Rootfs";
+		reg = <0x1800000 0x8000000>;
+		};
+		user@9800000 {
+		label = "User data";
+		reg = <0x9800000 0x6800000>;
+		};
+	};
+    };
+
+    leds {
+        status = "disabled";
+        /delete-node/ pb18;
+        /delete-node/ pd21;
+
+        led-status {
+                label = "led-status"; // LED2
+                gpios = <&pioA 24 GPIO_ACTIVE_LOW>;  // All
+                linux,default-trigger = "default-on";
+        };
+    };
+
+    /* GPS-PPS input on AP1 */
+    pps-0 {
+            compatible = "pps-gpio";
+            gpios = <&pioA 29 0>;
+            capture-clear;
+            status = "okay";
+    };
+
+    /* pca953x driver wants a regulator
+     * This dummy regulator prevents warnings */
+    dummy_reg: regulator@0 {
+        compatible = "regulator-fixed";
+        regulator-name = "dummy-supply";
+    };
+
+    i2c-gpio-0 {
+		status = "okay";
+
+		id_eeprom@56 {
+			compatible = "atmel,24c04";
+			reg = <0x56>;
+			pagesize = <16>;
+		        status = "okay";
+		};
+		board_temp@48 {
+			compatible = "ti,tmp102";
+			reg = <0x48>;
+		        status = "okay";
+			/* tempsensor_alert line running to pin PC19 on processor
+			   set up an interrupt for this? */
+		};
+		/* gpio0 through gpio3 are integrated into the SAM9G25 and defined
+		 * in at91sam9x5.dtsi
+		     * pioA == gpio0
+		 * pioB == gpio1
+		 * pioC == gpio2
+		 * pioC == gpio3
+		 * gpio4 and gpio5 for MTCDT-0.2 follow:       
+		 */
+		gpio4: pca9557@18 {
+			compatible = "nxp,pca9557";
+			reg = <0x18>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			vcc-supply = <&dummy_reg>;
+		};
+		gpio5: pca9557@19 {
+			compatible = "nxp,pca9557";
+			reg = <0x19>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			vcc-supply = <&dummy_reg>;
+		};
+    };
+    i2c-gpio-1 {
+		status = "okay";
+
+		ap1_eeprom@50 {
+			compatible = "atmel,24c04";
+			reg = <0x50>;
+			pagesize = <16>;
+		        status = "okay";
+		};
+		ap2_eeprom@52 {
+			compatible = "atmel,24c04";
+			reg = <0x52>;
+			pagesize = <16>;
+		        status = "okay";
+		};
+    };
+    mts-io-0 {
+	status = "okay";
+	compatible = "mts,mts-io";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_mts_io_out>, <&pinctrl_mts_io_in>, <&pinctrl_mts_io_gnss>;
+    };
+    /delete-node/ sound;
+    /delete-node/ ssc@f0010000;
+    /delete-node/ adc@f804c000;
+};
+
+&usb0 {
+    /delete-property/ atmel,vbus-gpio;
+};
+
+&usb2 {
+    /delete-property/ atmel,vbus-gpio;
+    status = "okay";
+};
+
+&uart0 {
+    // GNSS on MTCDT-0.2
+    status = "disabled";
+    dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(11)>,
+       <&dma0 1 (AT91_DMA_CFG_PER_ID(12) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
+    dma-names = "tx", "rx";
+    atmel,use-dma-rx;
+    atmel,use-dma-tx;
+};
+
+&usart1 {
+    status = "disabled";
+    atmel,use-dma-rx;
+    atmel,use-dma-tx;
+    pinctrl-0 = <&pinctrl_usart1 &pinctrl_usart1_rts &pinctrl_usart1_cts
+        &pinctrl_usart1_rng &pinctrl_usart1_dcd &pinctrl_usart1_dtr>;
+    rng-gpios = <&pioA 27 GPIO_ACTIVE_LOW>;
+    dcd-gpios = <&pioA 26 GPIO_ACTIVE_LOW>;
+    dtr-gpios = <&pioA 25 GPIO_ACTIVE_LOW>;
+    dma-names = "tx", "rx";
+};
+
+
+&usart3 {
+    status = "disabled";
+    atmel,use-dma-rx;
+    atmel,use-dma-tx;
+    pinctrl-0 = <&pinctrl_usart3 &pinctrl_usart3_rts &pinctrl_usart3_cts
+        &pinctrl_usart3_rng &pinctrl_usart3_dcd &pinctrl_usart3_dtr>;
+    rng-gpios = <&pioC 14 GPIO_ACTIVE_LOW>;
+    dcd-gpios = <&pioC 13 GPIO_ACTIVE_LOW>;
+    dtr-gpios = <&pioC 12 GPIO_ACTIVE_LOW>;
+    dma-names = "tx", "rx";
+};
+
+/* Explicit phandles for overlays
+ * Compiler generated low values
+ */
+&pioA {
+    phandle = <GPIO0_PH>;
+    phandle,linux = <GPIO0_PH>;
+};
+&pioB {
+    phandle = <GPIO1_PH>;
+    phandle,linux = <GPIO1_PH>;
+};
+&pioC {
+    phandle = <GPIO2_PH>;
+    phandle,linux = <GPIO2_PH>;
+};
+&pioD {
+    phandle = <GPIO3_PH>;
+    phandle,linux = <GPIO3_PH>;
+};
+// gpio-base is in the doc but does not work.
+&gpio4 {
+    phandle = <GPIO4_PCA9557_PH>;
+    phandle,linux = <GPIO4_PCA9557_PH>;
+    // gpio-base = <128>;
+};
+&gpio5 {
+    phandle = <GPIO5_PCA9557_PH>;
+    phandle,linux = <GPIO5_PCA9557_PH>;
+    // gpio-base = <136>;
+};
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/mtrv1/linux-4.9-mtrv1-device-tree.patch b/recipes-kernel/linux/linux-at91-4.9.87/mtrv1/linux-4.9-mtrv1-device-tree.patch
index e84e6ff..b720488 100644
--- a/recipes-kernel/linux/linux-at91-4.9.87/mtrv1/linux-4.9-mtrv1-device-tree.patch
+++ b/recipes-kernel/linux/linux-at91-4.9.87/mtrv1/linux-4.9-mtrv1-device-tree.patch
@@ -1,7 +1,7 @@
 diff -Naru orig/arch/arm/boot/dts/mtrv1.dts new/arch/arm/boot/dts/mtrv1.dts
 --- orig/arch/arm/boot/dts/mtrv1.dts	1969-12-31 18:00:00.000000000 -0600
-+++ new/arch/arm/boot/dts/mtrv1.dts	2021-09-10 09:30:24.760466509 -0500
-@@ -0,0 +1,296 @@
++++ new/arch/arm/boot/dts/mtrv1.dts	2021-09-23 08:27:46.971030415 -0500
+@@ -0,0 +1,299 @@
 +/*
 + * DTS file for Multi-Tech Systems MTRv1 Hardware
 + *
@@ -42,6 +42,7 @@ diff -Naru orig/arch/arm/boot/dts/mtrv1.dts new/arch/arm/boot/dts/mtrv1.dts
 +
 +	ahb {
 +		apb {
++
 +			/delete-node/ spi@f0004000;
 +			macb0: ethernet@f802c000 {
 +				phy-mode = "rmii";
@@ -50,6 +51,9 @@ diff -Naru orig/arch/arm/boot/dts/mtrv1.dts new/arch/arm/boot/dts/mtrv1.dts
 +
 +
 +			pinctrl@fffff400 {
++				usart3 {
++					/delete-node/ usart3_sck-0;
++				};
 +				nand {
 +					pinctrl_nand: nand-0 {
 +						atmel,pins =
@@ -291,14 +295,12 @@ diff -Naru orig/arch/arm/boot/dts/mtrv1.dts new/arch/arm/boot/dts/mtrv1.dts
 +};
 +
 +&usart3 {
-+    status = "okay";
++    status = "disabled";
 +    atmel,use-dma-rx;
 +    atmel,use-dma-tx;
-+    dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(14)>,
-+             <&dma0 1 (AT91_DMA_CFG_PER_ID(15) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
++    pinctrl-0 = <&pinctrl_usart3 &pinctrl_usart3_rts &pinctrl_usart3_cts>;
 +    dma-names = "tx", "rx";
 +};
-
 diff -Naru linux-4.9.87.orig/arch/arm/boot/dts/at91sam9x5cm.dtsi linux-4.9.87/arch/arm/boot/dts/at91sam9x5cm.dtsi
 --- linux-4.9.87.orig/arch/arm/boot/dts/at91sam9x5cm.dtsi	2019-01-03 15:21:25.339570341 -0600
 +++ linux-4.9.87/arch/arm/boot/dts/at91sam9x5cm.dtsi	2019-01-03 15:17:51.911576659 -0600
diff --git a/recipes-kernel/linux/linux-at91-5.4.81/defconfig b/recipes-kernel/linux/linux-at91-5.4.81/defconfig
index 6a98945..022b72d 100644
--- a/recipes-kernel/linux/linux-at91-5.4.81/defconfig
+++ b/recipes-kernel/linux/linux-at91-5.4.81/defconfig
@@ -2207,7 +2207,8 @@ CONFIG_GPIO_SYSFS=y
 # CONFIG_GPIO_GW_PLD is not set
 # CONFIG_GPIO_MAX7300 is not set
 # CONFIG_GPIO_MAX732X is not set
-# CONFIG_GPIO_PCA953X is not set
+CONFIG_GPIO_PCA953X=y
+# CONFIG_GPIO_PCA953X_IRQ is not set
 # CONFIG_GPIO_PCF857X is not set
 # CONFIG_GPIO_TPIC2810 is not set
 # end of I2C GPIO expanders
diff --git a/recipes-kernel/linux/linux-at91-5.4.81/mt-at91.h b/recipes-kernel/linux/linux-at91-5.4.81/mt-at91.h
new file mode 100644
index 0000000..36fba62
--- /dev/null
+++ b/recipes-kernel/linux/linux-at91-5.4.81/mt-at91.h
@@ -0,0 +1,19 @@
+#ifndef _DT_BINDINGS_GPIO_MT_AT91_H
+#define _DT_BINDINGS_GPIO_MT_AT91_H
+/*
+ * Device tree explicit phandles
+ * for overlays. First four are AT91.
+ * Kernel must know about this to
+ * build the device tree. Overlay
+ * recipe needs this to find the
+ * GPIO stanza phandle.
+ */
+
+#define GPIO0_PH 0xffff0000
+#define GPIO1_PH 0xffff0001
+#define GPIO2_PH 0xffff0002
+#define GPIO3_PH 0xffff0003
+#define GPIO4_PCA9557_PH 0xffff0004
+#define GPIO5_PCA9557_PH 0xffff0005
+
+#endif
diff --git a/recipes-kernel/linux/linux-at91-5.4.81/mtcdt/linux-5.4-reserve-5-bit-serial-for-multidrop.patch b/recipes-kernel/linux/linux-at91-5.4.81/mtcdt/linux-5.4-reserve-5-bit-serial-for-multidrop.patch
new file mode 100644
index 0000000..33f8ecd
--- /dev/null
+++ b/recipes-kernel/linux/linux-at91-5.4.81/mtcdt/linux-5.4-reserve-5-bit-serial-for-multidrop.patch
@@ -0,0 +1,31 @@
+From 1edc302f56b57512a99d6c21e1ddb85a89d16045 Mon Sep 17 00:00:00 2001
+From: Andrii Pientsov <andrii.pientsov@globallogic.com>
+Date: Mon, 22 Nov 2021 12:03:15 +0200
+Subject: [PATCH] [PATCH] linux-5.4-reserve-5-bit-serial-for-multidrop
+
+---
+ drivers/tty/serial/atmel_serial.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
+index ea0215a0f4a4..28d4a92c0d63 100644
+--- a/drivers/tty/serial/atmel_serial.c
++++ b/drivers/tty/serial/atmel_serial.c
+@@ -2158,10 +2158,13 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
+ 
+ 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
+ 
++	mdrop = 0;
+ 	/* byte size */
+ 	switch (termios->c_cflag & CSIZE) {
+ 	case CS5:
+-		mode |= ATMEL_US_CHRL_5;
++		mode |= ATMEL_US_PAR_MULTI_DROP;
++		mdrop = ATMEL_US_SENDA;
++		printk(KERN_INFO "termios: Setting Atmel Multi-Drop serial");
+ 		break;
+ 	case CS6:
+ 		mode |= ATMEL_US_CHRL_6;
+-- 
+2.25.1
+
diff --git a/recipes-kernel/linux/linux-at91-5.4.81/mts-dts/mtcdt.dts b/recipes-kernel/linux/linux-at91-5.4.81/mts-dts/mtcdt.dts
index 31b4fab..b7f05c4 100644
--- a/recipes-kernel/linux/linux-at91-5.4.81/mts-dts/mtcdt.dts
+++ b/recipes-kernel/linux/linux-at91-5.4.81/mts-dts/mtcdt.dts
@@ -15,6 +15,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/clock/at91.h>
+#include <dt-bindings/gpio/mt-at91.h>
 
 
 / {
@@ -26,9 +27,9 @@
 
 	aliases {
 		serial0 = &dbgu;
-		serial1 = &usart0;
-		serial2 = &usart1;
-		serial3 = &usart2;
+		serial2 = &usart1;  // AP1 serial on MTCDT-0.2
+		serial4 = &usart3;  // AP2 serial on MTCDT-0.2
+		serial5 = &uart0;   // GNSS       on MTCDT-0.2
 		gpio0 = &pioA;
 		gpio1 = &pioB;
 		gpio2 = &pioC;
@@ -371,6 +372,21 @@
 						atmel,pins =
 							<AT91_PIOC 29 AT91_PERIPH_C AT91_PINCTRL_NONE>;	/* PC29 periph C */
 					};
+
+					pinctrl_usart1_rng: usart1_rng-0 {
+						atmel,pins =
+							<AT91_PIOA 27 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
+
+					pinctrl_usart1_dcd: usart1_dcd-0 {
+						atmel,pins =
+							<AT91_PIOA 26 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
+
+					pinctrl_usart1_dtr: usart1_dtr-0 {
+						atmel,pins =
+							<AT91_PIOA 25 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
 				};
 
 				usart2 {
@@ -417,6 +433,21 @@
 						atmel,pins =
 							<AT91_PIOC 26 AT91_PERIPH_B AT91_PINCTRL_NONE>;		/* PC26 periph B */
 					};
+
+					pinctrl_usart3_rng: usart3_rng-0 {
+						atmel,pins =
+							<AT91_PIOC 14 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
+
+					pinctrl_usart3_dcd: usart3_dcd-0 {
+						atmel,pins =
+							<AT91_PIOC 13 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
+
+					pinctrl_usart3_dtr: usart3_dtr-0 {
+						atmel,pins =
+							<AT91_PIOC 12 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
 				};
 
 				uart0 {
@@ -454,25 +485,27 @@
 				};
 
 				mts-io {
-					    pinctrl_mts_io_out: mts_io-0 {
+					pinctrl_mts_io_out: mts_io-0 {
+						// gpio4 and gpio5 are reset in at91bootstrap. They should not be touched in Linux.
 						atmel,pins =
-							<AT91_PIOD 14 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP    /* PD14 WiFi BT reset */
-							AT91_PIOD 16 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP     /* PD16 Secure reset */
-							AT91_PIOD 17 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP     /* PD17 MTQ reset */
-							AT91_PIOD 18 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD18 USB Hub reset */
-							output-high;
-					    };
-					    pinctrl_mts_io_in: mts_io-1 {
+							<AT91_PIOD 14 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))    /* PD14 WiFi BT reset */
+							 AT91_PIOD 16 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))     /* PD16 Secure reset or gpio4 reset */
+							 AT91_PIOD 17 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))     /* PD17 MTQ reset */
+							 AT91_PIOD 18 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))>;   /* PD18 USB Hub reset */
+						output-high; // ignored by at91_pinctrl
+					};
+					pinctrl_mts_io_in: mts_io-1 {
 						atmel,pins =
 							<AT91_PIOD 19 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP   /* PD19 GNSS Int */
 							 AT91_PIOD 20 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD20 WiFi_BT_LPMode Input */
-						};
-					    pinctrl_mts_io_gnss: mts_io-2 {
+					};
+					// GNSS kept in reset to prevent EXAR from hanging
+					pinctrl_mts_io_gnss: mts_io-2 {
 						atmel,pins =
-						     <AT91_PIOC 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP      /* PC16 ETH_NRST */
-						     AT91_PIOD 15 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD15 N_GNSS_RESET */
-						     output-low;
-					    };
+							<AT91_PIOC 4 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(0))     /* PC16 ETH_NRST */
+							 AT91_PIOD 15 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(0))>;   /* PD15 N_GNSS_RESET */
+						output-low; // ignored by at91_pinctrl
+					};
 				};
 
 				mmc0 {
@@ -738,6 +771,8 @@
 					interrupt-controller;
 					#interrupt-cells = <2>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
+					phandle = <GPIO0_PH>;
+					phandle,linux = <GPIO0_PH>;
 				};
 
 				pioB: gpio@fffff600 {
@@ -750,6 +785,8 @@
 					interrupt-controller;
 					#interrupt-cells = <2>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
+					phandle = <GPIO1_PH>;
+					phandle,linux = <GPIO1_PH>;
 				};
 
 				pioC: gpio@fffff800 {
@@ -761,6 +798,8 @@
 					interrupt-controller;
 					#interrupt-cells = <2>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 3>;
+					phandle = <GPIO2_PH>;
+					phandle,linux = <GPIO2_PH>;
 				};
 
 				pioD: gpio@fffffa00 {
@@ -773,6 +812,8 @@
 					interrupt-controller;
 					#interrupt-cells = <2>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 3>;
+					phandle = <GPIO3_PH>;
+					phandle,linux = <GPIO3_PH>;
 				};
 			};
 
@@ -900,6 +941,11 @@
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 6>;
 				clock-names = "usart";
 				status = "disabled";
+				atmel,use-dma-rx;
+				atmel,use-dma-tx;
+				rng-gpios = <&pioA 27 GPIO_ACTIVE_LOW>;
+				dcd-gpios = <&pioA 26 GPIO_ACTIVE_LOW>;
+				dtr-gpios = <&pioA 25 GPIO_ACTIVE_LOW>;
 			};
 
 			usart2: serial@f8024000 {
@@ -928,6 +974,11 @@
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 8>;
 				clock-names = "usart";
 				status = "disabled";
+				atmel,use-dma-rx;
+				atmel,use-dma-tx;
+				rng-gpios = <&pioC 14 GPIO_ACTIVE_LOW>;
+				dcd-gpios = <&pioC 13 GPIO_ACTIVE_LOW>;
+				dtr-gpios = <&pioC 12 GPIO_ACTIVE_LOW>;
 			};
 
 			uart0: serial@f8040000 {
@@ -936,11 +987,14 @@
 				interrupts = <15 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_uart0>;
+				dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(11)>,
+				       <&dma0 1 (AT91_DMA_CFG_PER_ID(12) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
+				dma-names = "tx", "rx";
 				clocks = <&pmc PMC_TYPE_PERIPHERAL 15>;
 				clock-names = "usart";
 				atmel,use-dma-rx;
 				atmel,use-dma-tx;
-				status = "okay";
+				status = "disabled";
 			};
 
 			uart1: serial@f8044000 {
@@ -1294,6 +1348,36 @@
 		    /* tempsensor_alert line running to pin PC19 on processor
 		       set up an interrupt for this? */
 		};
+
+		/* gpio0 through gpio3 are integrated into the SAM9G25 and defined
+		 * in at91sam9x5.dtsi
+		     * pioA == gpio0
+		 * pioB == gpio1
+		 * pioC == gpio2
+		 * pioC == gpio3
+		 * gpio4 and gpio5 for MTCDT-0.2 follow:
+		 */
+		gpio4: pca9557@18 {
+			compatible = "nxp,pca9557";
+			reg = <0x18>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			vcc-supply = <&dummy_reg>;
+			phandle = <GPIO4_PCA9557_PH>;
+			phandle,linux = <GPIO4_PCA9557_PH>;
+			// gpio-base = <128>;
+		};
+
+		gpio5: pca9557@19 {
+			compatible = "nxp,pca9557";
+			reg = <0x19>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			vcc-supply = <&dummy_reg>;
+			phandle = <GPIO5_PCA9557_PH>;
+			phandle,linux = <GPIO5_PCA9557_PH>;
+			// gpio-base = <136>;
+		};
 	};
 
 	i2c-gpio-1 {
@@ -1344,38 +1428,17 @@
 		status = "okay";
 		compatible = "mts,mts-io";
 		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_mts_io_out>;
-		pinctrl-1 = <&pinctrl_mts_io_in>;
-		pinctrl-2 = <&pinctrl_mts_io_gnss>;
+		pinctrl-0 = <&pinctrl_mts_io_out>, <&pinctrl_mts_io_in>, <&pinctrl_mts_io_gnss>;
 	};
 
 	leds {
 		compatible = "gpio-leds";
+		status = "disabled";
 
-		pa24 {
-		    label = "led-status";
-		    gpios = <&pioA 24 GPIO_ACTIVE_LOW>;
-		    linux,default-trigger = "default-on";
-		};
-
-		pa25 {
-		    label = "led-a";
-		    gpios = <&pioA 25 GPIO_ACTIVE_LOW>;
-		};
-
-		pa26 {
-		    label = "led-b";
-		    gpios = <&pioA 26 GPIO_ACTIVE_LOW>;
-		};
-
-		pa27 {
-		    label = "led-c";
-		    gpios = <&pioA 27 GPIO_ACTIVE_LOW>;
-		};
-
-		pa28 {
-		    label = "led-d";
-		    gpios = <&pioA 28 GPIO_ACTIVE_LOW>;
+		led-status {
+			label = "led-status"; // LED2
+			gpios = <&pioA 24 GPIO_ACTIVE_LOW>;  // All
+			linux,default-trigger = "default-on";
 		};
 	};
 
@@ -1395,4 +1458,11 @@
 		pinctrl-0 = <&pinctrl_1wire_cm>;
 		status = "disabled";
 	};
+
+	/* pca953x driver wants a regulator
+	 * This dummy regulator prevents warnings */
+	dummy_reg: regulator@0 {
+		compatible = "regulator-fixed";
+		regulator-name = "dummy-supply";
+	};
 };
diff --git a/recipes-kernel/linux/linux-at91_4.9.87.bb b/recipes-kernel/linux/linux-at91_4.9.87.bb
index 4f035b5..7fc0e5d 100644
--- a/recipes-kernel/linux/linux-at91_4.9.87.bb
+++ b/recipes-kernel/linux/linux-at91_4.9.87.bb
@@ -19,7 +19,7 @@ RDEPENDS_kernel-modules_remove = "kernel-module-softdog"
 FILESEXTRAPATHS_prepend := "${THISDIR}/${P}:"
 KERNEL_EXTRA_ARGS ="LOADADDR=0x20008000"
 
-PR = "r14"
+PR = "r15"
 PKGR_kernel-module-i2c-at91 = "${PR}a${EXTENDPRAUTO}"
 PKGR_kernel-module-atmel-mci = "${PR}a${EXTENDPRAUTO}"
 KERNEL_VERSION = "${PV}"
@@ -41,9 +41,9 @@ COMMON_PATCHES = " \
 		  file://defconfig \
 		  file://linux-4.9-pps-gpio.patch \
 		  file://linux-4.9-at91sam9_wdt-10second-timeout.patch \
-                  file://linux-4.9-spidev_squack.patch \
-                  file://linux-4.9-add-num_accessory_ports-config-option.patch \
-                  file://linux-4.9-cdc-acm-ignore-exar-devices.patch \
+		  file://linux-4.9-spidev_squack.patch \
+		  file://linux-4.9-add-num_accessory_ports-config-option.patch \
+		  file://linux-4.9-cdc-acm-ignore-exar-devices.patch \
 		  file://EXTRAVERSION.patch \
 		  file://linux-4.9-ledtrig-netdev.patch \
 		  file://linux-4.9-addl-time-for-pmeccerrloc.patch \
@@ -60,7 +60,10 @@ COMMON_PATCHES = " \
 
 SRC_URI_append_mtcdt = "\
             ${COMMON_PATCHES} \
+            file://mtcdt.dts \
+            file://mt-at91.h \
             file://linux-4.9-mtcdt-device-tree.patch \
+            file://linux-4.9-mtcdt-atmel-multidrop.patch \
             "
 SRC_URI_append_mtrv1 = "\
             ${COMMON_PATCHES} \
@@ -124,6 +127,10 @@ kernel_do_configure_append() {
 	rm -f ${B}/.scmversion ${S}/.scmversion
 	cd ${S}; git status; cd -
 }
+kernel_do_configure_append_mtcdt() {
+	cp ${WORKDIR}/mtcdt.dts ${S}/arch/arm/boot/dts
+	cp ${WORKDIR}/mt-at91.h ${S}/arch/arm/boot/dts/include/dt-bindings/gpio
+}
 
 KERNEL_MODULE_PACKAGE_SUFFIX=""
 
diff --git a/recipes-kernel/linux/linux-at91_5.4.81.bb b/recipes-kernel/linux/linux-at91_5.4.81.bb
index 4c9d3c1..f57d418 100644
--- a/recipes-kernel/linux/linux-at91_5.4.81.bb
+++ b/recipes-kernel/linux/linux-at91_5.4.81.bb
@@ -45,10 +45,12 @@ COMMON_PATCHES = " \
 		  file://linux-5.4-OF-DT-Overlay-configfs-interface.patch \
 		  file://linux-5.4-revert-net-macb-Properly-handle-phylink-on-at91rm9200.patch \
 		  file://linux-5.4-bring-back-PAE-bit-and-fix-NCFGR-values-applicable-f.patch \
+		  file://mt-at91.h \
 "
 
 SRC_URI_append_mtcdt = "\
             ${COMMON_PATCHES} \
+            file://linux-5.4-reserve-5-bit-serial-for-multidrop.patch \
             "
 SRC_URI_append_mtrv1 = "\
             ${COMMON_PATCHES} \
@@ -76,6 +78,7 @@ python __anonymous () {
 copy_mts_dts_files () {
     # Install MTS device tree files
     cp -f ${THISDIR}/linux-at91-5.4.81/mts-dts/${MACHINE}.dts ${S}/arch/${ARCH}/boot/dts/
+    cp -f ${THISDIR}/linux-at91-5.4.81/mt-at91.h ${S}/include/dt-bindings/gpio
 }
 
 python do_unpack_append () {
diff --git a/recipes-kernel/rs9113/rs9113-from-src/debug-rs9113.patch b/recipes-kernel/rs9113/rs9113-from-src/debug-rs9113.patch
new file mode 100644
index 0000000..4101116
--- /dev/null
+++ b/recipes-kernel/rs9113/rs9113-from-src/debug-rs9113.patch
@@ -0,0 +1,14 @@
+* Turn off debug to prevent performance issues
+=======================================================
+diff --git a/source/host/config/make.config b/source/host/config/make.config
+index fd5133b..fc4507d 100644
+--- a/source/host/config/make.config
++++ b/source/host/config/make.config
+@@ -48,7 +48,6 @@ ifeq ($(CONFIG_CHW_20_40), y)
+ endif
+ 
+ 
+-EXTRA_CFLAGS += -DONEBOX_DEBUG_ENABLE
+ EXTRA_CFLAGS += -DPROGRAMMING_BBP_TA
+ EXTRA_CFLAGS += -DPROGRAMMING_SCAN_TA
+ EXTRA_CFLAGS += -DRSI_SDIO_MULTI_BLOCK_SUPPORT
diff --git a/recipes-kernel/rs9113/rs9113-from-src_1.6.5.bb b/recipes-kernel/rs9113/rs9113-from-src_1.6.5.bb
index efd6549..b9ddf80 100644
--- a/recipes-kernel/rs9113/rs9113-from-src_1.6.5.bb
+++ b/recipes-kernel/rs9113/rs9113-from-src_1.6.5.bb
@@ -18,6 +18,7 @@ SRCREV_FORMAT = "machine"
 SRC_URI = " \
         git://git@${MTS_INTERNAL_GIT}/mlinux/meta-rs9113.git;protocol=ssh;branch=${PV};destsuffix=meta/ \
         git://git@${MTS_INTERNAL_GIT}/mlinux/Redpine.git;protocol=ssh;branch=${PV} \
+        file://debug-rs9113.patch \
 "
 SRCXX_URI = " \
     git://git@${MTS_INTERNAL_GIT}/mlinux/Redpine.git;protocol=ssh;branch=${PV};name=machine \
@@ -59,7 +60,7 @@ do_compile () {
 
 do_patch () {
 	cd ${WORKDIR}/git
-	for f in ${M}/patches/* ; do
+	for f in ${M}/patches/* ../*.patch ; do
           # Cannot use [[ $f =~ \.patch$ ]] here because the $ after patch breaks the recipe.
           if echo ${f} | grep '\.patch$' >/dev/null 2>&1 ; then
             echo found patch ${f}