[PATCH v2 0/7] arm64: dts: freescale: Add Verdin iMX8M Mini overlays

[PATCH v2 0/7] arm64: dts: freescale: Add Verdin iMX8M Mini overlays

[Ernest Van Hoecke]

This series adds device tree overlays for the Toradex Verdin iMX8M Mini
SoM. The overlays cover audio configuration, display adapters, DSI
displays, and Cortex-M4F integration.

The series adds support for:
- NAU8822 Bridge Tied Load configuration on the Verdin Development Board
- DSI-to-HDMI adapter based on the Lontium LT8912B bridge
- DSI-to-LVDS adapter based on the TI SN65DSI84 bridge, combined with the
  Toradex Capacitive Touch Display 10.1" LVDS
- Toradex Capacitive Touch Display 7" and 10.1" DSI variants
- Cortex-M4F remoteproc support

Cortex-M4F support is split between the SoM description and an optional
UART_4 overlay. The SoM dtsi describes the remote processor and RPMsg
reserved-memory regions, while the overlay reserves Verdin UART_4 for
Cortex-M4F firmware use.

The Makefile entries build the standalone overlays as DTBOs, add
ready-to-use composed DTBs for selected carrier board and accessory
combinations, and add representative composed DTBs for build-time
coverage.

As discussed in v1, the overlays for the OV5640 cameras will follow
later and use the partial connectors model to specify the Verdin CSI
connector.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
Changes in v2:
- Dropped the OV5640 overlays, they will be added by a later series
- Link to v1: https://lore.kernel.org/r/20260713-v1-verdin-imx8mm-dtbos-v1-0-4acd63db4504@toradex.com

---
Ernest Van Hoecke (7):
      arm64: dts: freescale: imx8mm-verdin: Add NAU8822 Bridge Tied Load
      arm64: dts: freescale: imx8mm-verdin: Add DSI to HDMI adapter overlay
      arm64: dts: freescale: imx8mm-verdin: Add Toradex DSI to LVDS adapter with 10.1" display
      arm64: dts: freescale: imx8mm-verdin: Add Toradex Capacitive Touch Display 10.1" DSI
      arm64: dts: freescale: imx8mm-verdin: Add Toradex Capacitive Touch Display 7" DSI
      arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F remoteproc
      arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F UART_4 overlay

 arch/arm64/boot/dts/freescale/Makefile             |  35 ++++++
 .../freescale/imx8mm-verdin-dev-nau8822-btl.dtso   |  14 +++
 .../dts/freescale/imx8mm-verdin-dsi-to-hdmi.dtso   |  88 ++++++++++++++
 ...-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtso | 104 +++++++++++++++++
 .../imx8mm-verdin-panel-cap-touch-10inch-dsi.dtso  | 129 +++++++++++++++++++++
 .../imx8mm-verdin-panel-cap-touch-7inch-dsi.dtso   | 129 +++++++++++++++++++++
 .../dts/freescale/imx8mm-verdin-uart4-mcu.dtso     |  14 +++
 arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi   |  33 ++++++
 8 files changed, 546 insertions(+)
---
base-commit: 4d0d3a3d1993a41b2bf8d28aa6c6071fa1a3bff7
change-id: 20260707-v1-verdin-imx8mm-dtbos-a326146c62c4

Best regards,
-- 
Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

[PATCH v2 1/7] arm64: dts: freescale: imx8mm-verdin: Add NAU8822 Bridge Tied Load

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Add a device tree overlay for configuring the NAU8822 loudspeaker
outputs as a Bridge Tied Load (BTL) output on the Verdin Development
Board.

The overlay adds the codec property for the BTL-capable output
configuration, where the two loudspeaker outputs are combined for higher
output power.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile                     |  4 ++++
 .../boot/dts/freescale/imx8mm-verdin-dev-nau8822-btl.dtso  | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index d5c2dc720197..dcc0464b4e80 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -177,6 +177,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7901.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7902.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7903.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7904.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dev-nau8822-btl.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-ivy.dtb
@@ -184,12 +185,15 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-mallow.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-zinnia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-nau8822-btl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-ivy.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-mallow.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-zinnia.dtb
 
+imx8mm-verdin-wifi-dev-nau8822-btl-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dev-nau8822-btl.dtbo
+
 imx8mm-tqma8mqml-mba8mx-lvds-g133han01-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml-mba8mx-lvds-g133han01.dtbo
 imx8mm-tqma8mqml-mba8mx-lvds-tm070jvhg33-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml-mba8mx-lvds-tm070jvhg33.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-tqma8mqml-mba8mx-lvds-g133han01.dtb
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-dev-nau8822-btl.dtso b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dev-nau8822-btl.dtso
new file mode 100644
index 000000000000..e4b662519a6b
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dev-nau8822-btl.dtso
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Enable Bridge Tied Load (BTL) speaker mode on the Verdin Development Board,
+ * combining the two loudspeaker outputs for higher output power.
+ */
+
+/dts-v1/;
+/plugin/;
+
+&nau8822_1a {
+	nuvoton,spk-btl;
+};

-- 
2.43.0

[PATCH v2 2/7] arm64: dts: freescale: imx8mm-verdin: Add DSI to HDMI adapter overlay

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Add a device tree overlay for the Toradex DSI to HDMI Adapter, an
accessory that connects to the Verdin DSI_1 interface and provides a
full-size HDMI Type-A output. The adapter is based on the Lontium
LT8912B DSI-to-HDMI bridge.

The overlay is also combined with the Verdin iMX8M Mini carrier board
device trees to provide ready-to-use DTBs for the Dahlia, Yavia and
Development Board carriers, in both WiFi and non-WiFi SoM variants.

Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-hdmi-adapter
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile             | 13 ++++
 .../dts/freescale/imx8mm-verdin-dsi-to-hdmi.dtso   | 88 ++++++++++++++++++++++
 2 files changed, 101 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index dcc0464b4e80..f55c570cb3e3 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -178,21 +178,34 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7902.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7903.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7904.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dev-nau8822-btl.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dsi-to-hdmi.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-ivy.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-mallow.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-zinnia.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-nau8822-btl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-ivy.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-mallow.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-yavia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-zinnia.dtb
 
+imx8mm-verdin-nonwifi-dahlia-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-dahlia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-nonwifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-dev.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-nonwifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-wifi-dahlia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dahlia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-wifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 imx8mm-verdin-wifi-dev-nau8822-btl-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dev-nau8822-btl.dtbo
+imx8mm-verdin-wifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 
 imx8mm-tqma8mqml-mba8mx-lvds-g133han01-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml-mba8mx-lvds-g133han01.dtbo
 imx8mm-tqma8mqml-mba8mx-lvds-tm070jvhg33-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml-mba8mx-lvds-tm070jvhg33.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-dsi-to-hdmi.dtso b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dsi-to-hdmi.dtso
new file mode 100644
index 000000000000..507d0bbb5935
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dsi-to-hdmi.dtso
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex DSI to HDMI Adapter on Verdin DSI_1.
+ *
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-hdmi-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	reg_dsi_hdmi: regulator-dsi-hdmi {
+		compatible = "regulator-fixed";
+		/* Verdin CTRL_SLEEP_MOCI# (SODIMM 256) */
+		gpios = <&gpio5 1 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-boot-on;
+		regulator-name = "DSI_1_PWR_EN";
+	};
+};
+
+&hdmi_connector {
+	status = "okay";
+
+	port {
+		hdmi_connector_in: endpoint {
+			remote-endpoint = <&dsi_hdmi_bridge_out>;
+		};
+	};
+};
+
+&hdmi_lontium_lt8912 {
+	vdd-supply = <&reg_dsi_hdmi>;
+
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			dsi_hdmi_bridge_in: endpoint {
+				data-lanes = <1 2 3 4>;
+				remote-endpoint = <&mipi_dsi_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+
+			dsi_hdmi_bridge_out: endpoint {
+				remote-endpoint = <&hdmi_connector_in>;
+			};
+		};
+	};
+};
+
+/* Verdin I2C_2_DSI */
+&i2c2 {
+	clock-frequency = <10000>;
+
+	status = "okay";
+};
+
+&lcdif {
+	status = "okay";
+};
+
+&mipi_dsi {
+	samsung,esc-clock-frequency = <16000000>;
+
+	status = "okay";
+};
+
+&mipi_dsi_out {
+	remote-endpoint = <&dsi_hdmi_bridge_in>;
+};
+
+/* Verdin PWM_3_DSI (SODIMM 19) repurposed as HDMI HPD GPIO */
+&pwm1 {
+	status = "disabled";
+};

-- 
2.43.0

[PATCH v2 3/7] arm64: dts: freescale: imx8mm-verdin: Add Toradex DSI to LVDS adapter with 10.1" display

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Add a device tree overlay for the Toradex DSI to LVDS Adapter with the
Toradex Capacitive Touch Display 10.1" LVDS. The adapter connects to the
Verdin DSI_1 interface. It is based on the Texas Instruments SN65DSI84
DSI-to-LVDS bridge and drives a LogicTechno LT170410-2WHC 10.1" WXGA IPS
LCD panel. Touch input is provided by an Atmel maXTouch capacitive touch
controller.

Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-lvds-adapter
Link: https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-lvds
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile             |   4 +
 ...-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtso | 104 +++++++++++++++++++++
 2 files changed, 108 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index f55c570cb3e3..91ae54931818 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -179,6 +179,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7903.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7904.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dev-nau8822-btl.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dsi-to-hdmi.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dev-dsi-to-hdmi.dtb
@@ -191,6 +192,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-zinnia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-hdmi.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-nau8822-btl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-ivy.dtb
@@ -204,6 +206,8 @@ imx8mm-verdin-nonwifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-dev.dtb imx8
 imx8mm-verdin-nonwifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 imx8mm-verdin-wifi-dahlia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dahlia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 imx8mm-verdin-wifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch-dtbs := imx8mm-verdin-wifi-dev.dtb \
+	imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
 imx8mm-verdin-wifi-dev-nau8822-btl-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dev-nau8822-btl.dtbo
 imx8mm-verdin-wifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtso b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtso
new file mode 100644
index 000000000000..2c253018893b
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtso
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex DSI to LVDS Adapter on Verdin DSI_1 with Capacitive Touch Display
+ * 10.1". Used on Dahlia (X17) and Development Board (X48) that expose DSI_1
+ * via a Samtec LSS-130 connector.
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-lvds
+ * https://www.toradex.com/accessories/capacitive-touch-display-10.1-inch-lvds
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-lvds-adapter
+ * https://www.toradex.com/accessories/verdin-dsi-to-lvds-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+
+&{/} {
+	backlight_pwm3: backlight-pwm3 {
+		compatible = "pwm-backlight";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_i2s_2_d_out_dsi_1_bkl_en>;
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
+		/* Verdin I2S_2_D_OUT (SODIMM 46) - DSI_1_BKL_EN_LVDS */
+		enable-gpios = <&gpio3 24 GPIO_ACTIVE_HIGH>;
+		power-supply = <&reg_3p3v>;
+		/* Verdin PWM_3_DSI (SODIMM 19) - PWM_3_DSI_LVDS */
+		pwms = <&pwm1 0 6666667 PWM_POLARITY_INVERTED>;
+	};
+
+	panel-lvds-bridge {
+		compatible = "logictechno,lt170410-2whc";
+		backlight = <&backlight_pwm3>;
+		power-supply = <&reg_dsi_lvds>;
+
+		port {
+			panel_lvds_bridge_in: endpoint {
+				remote-endpoint = <&dsi_lvds_bridge_out>;
+			};
+		};
+	};
+
+	reg_dsi_lvds: regulator-dsi-lvds {
+		compatible = "regulator-fixed";
+		/* Verdin CTRL_SLEEP_MOCI# (SODIMM 256) */
+		gpios = <&gpio5 1 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-boot-on;
+		regulator-name = "DSI_1_PWR_EN";
+	};
+};
+
+&atmel_mxt_ts {
+	vdd-supply = <&reg_dsi_lvds>;
+
+	status = "okay";
+};
+
+&lcdif {
+	status = "okay";
+};
+
+&lvds_ti_sn65dsi84 {
+	vcc-supply = <&reg_dsi_lvds>;
+
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			dsi_lvds_bridge_in: endpoint {
+				data-lanes = <1 2 3 4>;
+				remote-endpoint = <&mipi_dsi_out>;
+			};
+		};
+
+		port@2 {
+			reg = <2>;
+
+			dsi_lvds_bridge_out: endpoint {
+				remote-endpoint = <&panel_lvds_bridge_in>;
+			};
+		};
+	};
+};
+
+&mipi_dsi {
+	samsung,esc-clock-frequency = <16000000>;
+
+	status = "okay";
+};
+
+&mipi_dsi_out {
+	remote-endpoint = <&dsi_lvds_bridge_in>;
+};

-- 
2.43.0

[PATCH v2 4/7] arm64: dts: freescale: imx8mm-verdin: Add Toradex Capacitive Touch Display 10.1" DSI

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Add a device tree overlay for the Toradex Capacitive Touch Display
10.1" on the Verdin DSI_1 interface. The display features an internal
Texas Instruments SN65DSI83 DSI-to-LVDS bridge driving a Riverdi
RVT101HVLNWC00 10.1" WXGA IPS TFT LCD panel. The touch input is
provided by an Ilitek ILI2132 capacitive touch controller.

The overlay is also combined with the Verdin iMX8M Mini Dahlia carrier
board device trees to provide ready-to-use DTBs in both WiFi and
non-WiFi SoM variants.

Link: https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-dsi
Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-display-adapter
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile             |   7 ++
 .../imx8mm-verdin-panel-cap-touch-10inch-dsi.dtso  | 129 +++++++++++++++++++++
 2 files changed, 136 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 91ae54931818..00dc2893c754 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -181,6 +181,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dev-nau8822-btl.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dsi-to-hdmi.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia-dsi-to-hdmi.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia-panel-cap-touch-10inch-dsi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-dev.dtb
@@ -189,7 +190,9 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-mallow.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-zinnia.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-panel-cap-touch-10inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-dsi-to-hdmi.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-panel-cap-touch-10inch-dsi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb
@@ -202,9 +205,13 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-zinnia.dtb
 
 imx8mm-verdin-nonwifi-dahlia-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-dahlia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-nonwifi-dahlia-panel-cap-touch-10inch-dsi-dtbs := imx8mm-verdin-nonwifi-dahlia.dtb \
+	imx8mm-verdin-panel-cap-touch-10inch-dsi.dtbo
 imx8mm-verdin-nonwifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-dev.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 imx8mm-verdin-nonwifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-nonwifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 imx8mm-verdin-wifi-dahlia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dahlia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
+imx8mm-verdin-wifi-dahlia-panel-cap-touch-10inch-dsi-dtbs := imx8mm-verdin-wifi-dahlia.dtb \
+	imx8mm-verdin-panel-cap-touch-10inch-dsi.dtbo
 imx8mm-verdin-wifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch-dtbs := imx8mm-verdin-wifi-dev.dtb \
 	imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-panel-cap-touch-10inch-dsi.dtso b/arch/arm64/boot/dts/freescale/imx8mm-verdin-panel-cap-touch-10inch-dsi.dtso
new file mode 100644
index 000000000000..5626903d668a
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-panel-cap-touch-10inch-dsi.dtso
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex Capacitive Touch Display 10.1" on Verdin DSI_1.
+ * On Dahlia (X17) and Development Board (X48), DSI_1 is exposed via a
+ * Samtec LSS-130 connector and requires the Toradex DSI Display Adapter
+ * to convert to FFC/FPC connector.
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-dsi
+ * https://www.toradex.com/accessories/capacitive-touch-display-10.1-inch-dsi
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-display-adapter
+ * https://www.toradex.com/accessories/verdin-dsi-display-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+
+&{/} {
+	backlight_pwm3: backlight-pwm3 {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
+		power-supply = <&reg_3p3v>;
+		/* Verdin PWM_3_DSI (SODIMM 19) */
+		pwms = <&pwm1 0 6666667 0>;
+	};
+
+	panel-lvds-bridge {
+		compatible = "riverdi,rvt101hvlnwc00", "panel-lvds";
+		backlight = <&backlight_pwm3>;
+		data-mapping = "vesa-24";
+		height-mm = <136>;
+		width-mm = <217>;
+
+		panel-timing {
+			clock-frequency = <71100000>;
+			de-active = <1>;
+			hactive = <1280>;
+			hback-porch = <64 64 64>;
+			hfront-porch = <36 36 36>;
+			hsync-active = <0>;
+			hsync-len = <24 24 24>;
+			pixelclk-active = <1>;
+			vactive = <800>;
+			vback-porch = <24 24 24>;
+			vfront-porch = <8 8 8>;
+			vsync-active = <0>;
+			vsync-len = <8 8 8>;
+		};
+
+		port {
+			panel_lvds_bridge_in: endpoint {
+				remote-endpoint = <&dsi_lvds_bridge_out>;
+			};
+		};
+	};
+};
+
+/* Verdin I2C_2_DSI */
+&i2c2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	status = "okay";
+
+	bridge@2c {
+		compatible = "ti,sn65dsi83";
+		reg = <0x2c>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_10_dsi>;
+		/* Verdin GPIO_10_DSI (SODIMM 21) - DSI_1_BKL_EN */
+		enable-gpios = <&gpio3 3 GPIO_ACTIVE_HIGH>;
+		vcc-supply = <&reg_1p8v>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				dsi_lvds_bridge_in: endpoint {
+					data-lanes = <1 2 3 4>;
+					remote-endpoint = <&mipi_dsi_out>;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+
+				dsi_lvds_bridge_out: endpoint {
+					remote-endpoint = <&panel_lvds_bridge_in>;
+				};
+			};
+		};
+	};
+
+	touchscreen@41 {
+		compatible = "ilitek,ili2132";
+		reg = <0x41>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_9_dsi>, <&pinctrl_i2s_2_bclk_touch_reset>;
+		/* Verdin GPIO_9_DSI (SODIMM 17) - TOUCH_INT# */
+		/* Rising edge avoids spurious interrupts from the noisy falling edge. */
+		interrupt-parent = <&gpio3>;
+		interrupts = <15 IRQ_TYPE_EDGE_RISING>;
+		/* Verdin I2S_2_BCLK (SODIMM 42) - TOUCH_RESET# */
+		reset-gpios = <&gpio3 23 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&lcdif {
+	status = "okay";
+};
+
+&mipi_dsi {
+	samsung,esc-clock-frequency = <16000000>;
+
+	status = "okay";
+};
+
+&mipi_dsi_out {
+	remote-endpoint = <&dsi_lvds_bridge_in>;
+};

-- 
2.43.0

[PATCH v2 5/7] arm64: dts: freescale: imx8mm-verdin: Add Toradex Capacitive Touch Display 7" DSI

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Add a device tree overlay for the Toradex Capacitive Touch Display 7"
on the Verdin DSI_1 interface. The display features an internal Texas
Instruments SN65DSI83 DSI-to-LVDS bridge driving a Riverdi
RVT70HSLNWCA0 7" WSVGA IPS TFT LCD panel. The touch input is provided
by an Ilitek ILI2132 capacitive touch controller.

Link: https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-7inch-dsi
Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-display-adapter
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile             |   4 +
 .../imx8mm-verdin-panel-cap-touch-7inch-dsi.dtso   | 129 +++++++++++++++++++++
 2 files changed, 133 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 00dc2893c754..fe261d7bdab5 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -191,12 +191,14 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-zinnia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-panel-cap-touch-10inch-dsi.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-panel-cap-touch-7inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-panel-cap-touch-10inch-dsi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-nau8822-btl.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-panel-cap-touch-7inch-dsi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-ivy.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-mallow.dtb
@@ -216,6 +218,8 @@ imx8mm-verdin-wifi-dev-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-ver
 imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch-dtbs := imx8mm-verdin-wifi-dev.dtb \
 	imx8mm-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
 imx8mm-verdin-wifi-dev-nau8822-btl-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dev-nau8822-btl.dtbo
+imx8mm-verdin-wifi-dev-panel-cap-touch-7inch-dsi-dtbs := imx8mm-verdin-wifi-dev.dtb \
+	imx8mm-verdin-panel-cap-touch-7inch-dsi.dtbo
 imx8mm-verdin-wifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 
 imx8mm-tqma8mqml-mba8mx-lvds-g133han01-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml-mba8mx-lvds-g133han01.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-panel-cap-touch-7inch-dsi.dtso b/arch/arm64/boot/dts/freescale/imx8mm-verdin-panel-cap-touch-7inch-dsi.dtso
new file mode 100644
index 000000000000..0e15b4b3f3ec
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-panel-cap-touch-7inch-dsi.dtso
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex Capacitive Touch Display 7" on Verdin DSI_1.
+ * On Dahlia (X17) and Development Board (X48), DSI_1 is exposed via a
+ * Samtec LSS-130 connector and requires the Toradex DSI Display Adapter
+ * to convert to FFC/FPC connector.
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-7inch-dsi
+ * https://www.toradex.com/accessories/capacitive-touch-display-7-inch-dsi
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-display-adapter
+ * https://www.toradex.com/accessories/verdin-dsi-display-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+
+&{/} {
+	backlight_pwm3: backlight-pwm3 {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
+		power-supply = <&reg_3p3v>;
+		/* Verdin PWM_3_DSI (SODIMM 19) */
+		pwms = <&pwm1 0 6666667 0>;
+	};
+
+	panel-lvds-bridge {
+		compatible = "riverdi,rvt70hslnwca0", "panel-lvds";
+		backlight = <&backlight_pwm3>;
+		data-mapping = "vesa-24";
+		height-mm = <86>;
+		width-mm = <154>;
+
+		panel-timing {
+			clock-frequency = <51200000>;
+			de-active = <1>;
+			hactive = <1024>;
+			hback-porch = <100 100 100>;
+			hfront-porch = <16 160 216>;
+			hsync-active = <0>;
+			hsync-len = <50 60 140>;
+			pixelclk-active = <1>;
+			vactive = <600>;
+			vback-porch = <23 23 23>;
+			vfront-porch = <1 12 126>;
+			vsync-active = <0>;
+			vsync-len = <1 10 20>;
+		};
+
+		port {
+			panel_lvds_bridge_in: endpoint {
+				remote-endpoint = <&dsi_lvds_bridge_out>;
+			};
+		};
+	};
+};
+
+/* Verdin I2C_2_DSI */
+&i2c2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	status = "okay";
+
+	bridge@2c {
+		compatible = "ti,sn65dsi83";
+		reg = <0x2c>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_10_dsi>;
+		/* Verdin GPIO_10_DSI (SODIMM 21) - DSI_1_BKL_EN */
+		enable-gpios = <&gpio3 3 GPIO_ACTIVE_HIGH>;
+		vcc-supply = <&reg_1p8v>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				dsi_lvds_bridge_in: endpoint {
+					data-lanes = <1 2 3 4>;
+					remote-endpoint = <&mipi_dsi_out>;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+
+				dsi_lvds_bridge_out: endpoint {
+					remote-endpoint = <&panel_lvds_bridge_in>;
+				};
+			};
+		};
+	};
+
+	touchscreen@41 {
+		compatible = "ilitek,ili2132";
+		reg = <0x41>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_9_dsi>, <&pinctrl_i2s_2_bclk_touch_reset>;
+		/* Verdin GPIO_9_DSI (SODIMM 17) - TOUCH_INT# */
+		/* Rising edge avoids spurious interrupts from the noisy falling edge. */
+		interrupt-parent = <&gpio3>;
+		interrupts = <15 IRQ_TYPE_EDGE_RISING>;
+		/* Verdin I2S_2_BCLK (SODIMM 42) - TOUCH_RESET# */
+		reset-gpios = <&gpio3 23 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&lcdif {
+	status = "okay";
+};
+
+&mipi_dsi {
+	samsung,esc-clock-frequency = <16000000>;
+
+	status = "okay";
+};
+
+&mipi_dsi_out {
+	remote-endpoint = <&dsi_lvds_bridge_in>;
+};

-- 
2.43.0

[PATCH v2 6/7] arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F remoteproc

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Describe the Cortex-M4F remote processor available on the Verdin iMX8M
Mini SoM.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 33 ++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
index 5fc177f589cb..ac450fc6cbfb 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
@@ -52,6 +52,18 @@ hdmi_connector: hdmi-connector {
 		status = "disabled";
 	};
 
+	imx8mm-cm4 {
+		compatible = "fsl,imx8mm-cm4";
+		clocks = <&clk IMX8MM_CLK_M4_DIV>;
+		mbox-names = "tx", "rx", "rxdb";
+		mboxes = <&mu 0 1
+			  &mu 1 1
+			  &mu 3 1>;
+		memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>,
+				<&rsc_table>;
+		syscon = <&src>;
+	};
+
 	/* Carrier Board Supplies */
 	reg_1p8v: regulator-1p8v {
 		compatible = "regulator-fixed";
@@ -164,6 +176,27 @@ reserved-memory {
 
 		/* Use the kernel configuration settings instead */
 		/delete-node/ linux,cma;
+
+		vdev0vring0: vdev0vring0@55000000 {
+			reg = <0 0x55000000 0 0x8000>;
+			no-map;
+		};
+
+		vdev0vring1: vdev0vring1@55008000 {
+			reg = <0 0x55008000 0 0x8000>;
+			no-map;
+		};
+
+		rsc_table: rsc-table@550ff000 {
+			reg = <0 0x550ff000 0 0x1000>;
+			no-map;
+		};
+
+		vdev0buffer: vdev0buffer@55400000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0x55400000 0 0x100000>;
+			no-map;
+		};
 	};
 };
 

-- 
2.43.0

Re: [PATCH v2 6/7] arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F remoteproc

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] Unconditional enablement of the Cortex-M4 co-processor and its memory reservations in a base SoM device tree file.
--

--- Patch [6]: [PATCH v2 6/7] arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F remoteproc ---
commit 5627e466b821e2ae1d5d44438ab0c467605d30f9
Author: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F remoteproc

This patch describes the Cortex-M4F remote processor available on the
Verdin iMX8M Mini SoM.

> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> index 5fc177f589cb2..ac450fc6cbfb3 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> @@ -52,6 +52,18 @@ hdmi_connector: hdmi-connector {
>  		status = "disabled";
>  	};
>  
> +	imx8mm-cm4 {
> +		compatible = "fsl,imx8mm-cm4";
> +		clocks = <&clk IMX8MM_CLK_M4_DIV>;

[Severity: Medium]
Should this node default to disabled?

Because it is added unconditionally to the base SoM dtsi, it defaults
to "okay". This causes the imx_rproc driver to bind and call
devm_clk_get_enabled() during probe, which keeps the IMX8MM_CLK_M4_DIV
clock permanently running even if the M4 firmware is never booted.

> +		mbox-names = "tx", "rx", "rxdb";
> +		mboxes = <&mu 0 1
> +			  &mu 1 1
> +			  &mu 3 1>;
> +		memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>,
> +				<&rsc_table>;
> +		syscon = <&src>;
> +	};
> +

[ ... ]

> @@ -164,6 +176,27 @@ reserved-memory {
>  
>  		/* Use the kernel configuration settings instead */
>  		/delete-node/ linux,cma;
> +
> +		vdev0vring0: vdev0vring0@55000000 {
> +			reg = <0 0x55000000 0 0x8000>;
> +			no-map;
> +		};
> +
> +		vdev0vring1: vdev0vring1@55008000 {
> +			reg = <0 0x55008000 0 0x8000>;
> +			no-map;
> +		};
> +
> +		rsc_table: rsc-table@550ff000 {
> +			reg = <0 0x550ff000 0 0x1000>;
> +			no-map;
> +		};
> +
> +		vdev0buffer: vdev0buffer@55400000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0 0x55400000 0 0x100000>;
> +			no-map;
> +		};

[Severity: Medium]
Are we sure we want to unconditionally reserve these memory regions for
all boards using this base SoM?

Because of the no-map properties, this removes roughly 1.1MB of RAM
from the kernel's linear mapping permanently across all Verdin i.MX8MM
boards, even when the M4 coprocessor is not used.

>  	};
>  };

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260724-v1-verdin-imx8mm-dtbos-v2-0-9d7988bd76f6@toradex.com?part=6

[PATCH v2 7/7] arm64: dts: freescale: imx8mm-verdin: Add Cortex-M4F UART_4 overlay

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Verdin UART_4 can be assigned to Cortex-M4F firmware. Add an overlay
that marks the UART as reserved so Linux does not claim the port.

The overlay is also combined with the Verdin iMX8M Mini Development
Board device tree to provide a ready-to-use DTB for the WiFi SoM
variant.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile                     |  3 +++
 arch/arm64/boot/dts/freescale/imx8mm-verdin-uart4-mcu.dtso | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index fe261d7bdab5..95ae85ab4adf 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -192,6 +192,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-nonwifi-zinnia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-panel-cap-touch-10inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-panel-cap-touch-7inch-dsi.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-uart4-mcu.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia-panel-cap-touch-10inch-dsi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dahlia.dtb
@@ -199,6 +200,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-nau8822-btl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-panel-cap-touch-7inch-dsi.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev-uart4-mcu.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-ivy.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-verdin-wifi-mallow.dtb
@@ -220,6 +222,7 @@ imx8mm-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch-dtbs := imx8mm-verdin-
 imx8mm-verdin-wifi-dev-nau8822-btl-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-dev-nau8822-btl.dtbo
 imx8mm-verdin-wifi-dev-panel-cap-touch-7inch-dsi-dtbs := imx8mm-verdin-wifi-dev.dtb \
 	imx8mm-verdin-panel-cap-touch-7inch-dsi.dtbo
+imx8mm-verdin-wifi-dev-uart4-mcu-dtbs := imx8mm-verdin-wifi-dev.dtb imx8mm-verdin-uart4-mcu.dtbo
 imx8mm-verdin-wifi-yavia-dsi-to-hdmi-dtbs := imx8mm-verdin-wifi-yavia.dtb imx8mm-verdin-dsi-to-hdmi.dtbo
 
 imx8mm-tqma8mqml-mba8mx-lvds-g133han01-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml-mba8mx-lvds-g133han01.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-uart4-mcu.dtso b/arch/arm64/boot/dts/freescale/imx8mm-verdin-uart4-mcu.dtso
new file mode 100644
index 000000000000..8dbecffe9e7b
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-uart4-mcu.dtso
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Verdin iMX8M Mini UART_4 for Cortex-M4F
+ */
+
+/dts-v1/;
+/plugin/;
+
+/* Verdin UART_4 */
+&uart4 {
+	status = "reserved";
+};

-- 
2.43.0