ARM: dts: stm32: Add DHCOM based PicoITX board

Add DT for DH PicoITX unit, which is a bare-bones carrier board for
the DHCOM. The board has ethernet port, USB, CAN, LEDs and a custom
board-to-board expansion connector.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>

5 files changed, 131 insertions, 1 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 7d1a369845..e2e8a5fb7a 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -965,6 +965,7 @@ dtb-$(CONFIG_STM32MP15x) += \
 	stm32mp157c-odyssey.dtb \
 	stm32mp15xx-dhcom-drc02.dtb \
 	stm32mp15xx-dhcom-pdk2.dtb \
+	stm32mp15xx-dhcom-picoitx.dtb \
 	stm32mp15xx-dhcor-avenger96.dtb
 
 dtb-$(CONFIG_SOC_K3_AM6) += k3-am654-base-board.dtb k3-am654-r5-base-board.dtb
diff --git a/arch/arm/dts/stm32mp15xx-dhcom-picoitx-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcom-picoitx-u-boot.dtsi
new file mode 100644
index 0000000000..3cac663d98
--- /dev/null
+++ b/arch/arm/dts/stm32mp15xx-dhcom-picoitx-u-boot.dtsi
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2020 Marek Vasut <marex@denx.de>
+ */
+
+#include "stm32mp15xx-dhcom-u-boot.dtsi"
+
+/ {
+	aliases {
+		/delete-property/ ethernet1;
+	};
+};
+
+/delete-node/ &ksz8851;
diff --git a/arch/arm/dts/stm32mp15xx-dhcom-picoitx.dts b/arch/arm/dts/stm32mp15xx-dhcom-picoitx.dts
new file mode 100644
index 0000000000..7f5cff49b7
--- /dev/null
+++ b/arch/arm/dts/stm32mp15xx-dhcom-picoitx.dts
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2020 Marek Vasut <marex@denx.de>
+ */
+
+#include "stm32mp15xx-dhcom.dtsi"
+
+/ {
+	model = "DH Electronics STM32MP15xx DHCOM PicoITX";
+	compatible = "dh,stm32mp15xx-dhcom-picoitx", "st,stm32mp1xx";
+
+	aliases {
+		serial0 = &uart4;
+		serial1 = &usart3;
+		serial2 = &uart8;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&adc {
+	status = "disabled";
+};
+
+&dac {
+	status = "disabled";
+};
+
+&gpioa {
+	/*
+	 * NOTE: The USB Port on the PicoITX needs a PWR_EN signal to enable
+	 * port power. This signal should be handled by USB power sequencing
+	 * in order to turn on port power when USB bus is powered up, but so
+	 * far there is no such functionality.
+	 */
+	usb-port-power {
+		gpio-hog;
+		gpios = <13 GPIO_ACTIVE_LOW>;
+		output-low;
+		line-name = "usb-port-power";
+	};
+};
+
+&i2c2 {	/* On board-to-board connector (optional) */
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pins_a>;
+	i2c-scl-rising-time-ns = <185>;
+	i2c-scl-falling-time-ns = <20>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+};
+
+&i2c5 {	/* On board-to-board connector */
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c5_pins_a>;
+	i2c-scl-rising-time-ns = <185>;
+	i2c-scl-falling-time-ns = <20>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+};
+
+&usart3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usart3_pins_a>;
+	status = "okay";
+};
+
+&uart8 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart8_pins_a>;
+	status = "okay";
+};
+
+&usbh_ehci {
+	phys = <&usbphyc_port0>;
+	status = "okay";
+};
+
+&usbphyc {
+	status = "okay";
+};
+
+&usbphyc_port0 {
+	phy-supply = <&vdd_usb>;
+	vdda1v1-supply = <&reg11>;
+	vdda1v8-supply = <&reg18>;
+};
diff --git a/board/dhelectronics/dh_stm32mp1/u-boot-dhcom.its b/board/dhelectronics/dh_stm32mp1/u-boot-dhcom.its
index 905be57dff..ba48786e08 100644
--- a/board/dhelectronics/dh_stm32mp1/u-boot-dhcom.its
+++ b/board/dhelectronics/dh_stm32mp1/u-boot-dhcom.its
@@ -31,6 +31,14 @@
 			arch = "arm";
 			compression = "none";
 		};
+
+		fdt-3 {
+			description = ".dtb";
+			data = /incbin/("arch/arm/dts/stm32mp15xx-dhcom-picoitx.dtb");
+			type = "flat_dt";
+			arch = "arm";
+			compression = "none";
+		};
 	};
 
 	configurations {
@@ -64,6 +72,20 @@
 			fdt = "fdt-2";
 		};
 
+		config-5 {
+			/* DT+SoM+board model */
+			description = "dh,stm32mp15xx-dhcom-picoitx_somrev0_boardrev0";
+			loadables = "uboot";
+			fdt = "fdt-3";
+		};
+
+		config-6 {
+			/* DT+SoM+board model */
+			description = "dh,stm32mp15xx-dhcom-picoitx_somrev1_boardrev0";
+			loadables = "uboot";
+			fdt = "fdt-3";
+		};
+
 		/* Add 587-100..587-400 with fdt-2..fdt-4 here */
 	};
 };
diff --git a/configs/stm32mp15_dhcom_basic_defconfig b/configs/stm32mp15_dhcom_basic_defconfig
index d7b4cd76c8..96c3d170a5 100644
--- a/configs/stm32mp15_dhcom_basic_defconfig
+++ b/configs/stm32mp15_dhcom_basic_defconfig
@@ -57,7 +57,7 @@ CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_MTDPARTS=y
 # CONFIG_SPL_DOS_PARTITION is not set
-CONFIG_OF_LIST="stm32mp15xx-dhcom-pdk2 stm32mp15xx-dhcom-drc02"
+CONFIG_OF_LIST="stm32mp15xx-dhcom-pdk2 stm32mp15xx-dhcom-drc02 stm32mp15xx-dhcom-picoitx"
 CONFIG_OF_SPL_REMOVE_PROPS="interrupts interrupt-names interrupts-extended interrupt-controller \\\#interrupt-cells interrupt-parent dmas dma-names assigned-clocks assigned-clock-rates assigned-clock-parents hwlocks"
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_USE_ENV_SPI_BUS=y