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Lukasz Majewskifabioestevam
Lukasz Majewski
authored and
fabioestevam
committed
ARM: imx: mxs: Add support for imx287 based BTT devices
The btt[c3] devices are based on imx287 SoC. U-Boot SPL 2025.04-01081-g07e086681d26 (Apr 16 2025 - 12:24:36 +0200) Trying to boot from MMC1 U-Boot 2025.04-01081-g07e086681d26 (Apr 16 2025 - 12:24:36 +0200) CPU: Freescale i.MX28 rev1.2 at 454 MHz BOOT: SSP SPI #3, master, 3V3 NOR Model: BTT3 Board: LWE BTT SoM HW rev 0 DRAM: 256 MiB Core: 86 devices, 15 uclasses, devicetree: separate MMC: MXS MMC: 0 Loading Environment from SPIFlash... SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB OK In: serial@80074000 Out: serial@80074000 Err: serial@80074000 Net: eth0: ethernet@800f0000 Hit any key to stop autoboot: 0 Signed-off-by: Lukasz Majewski <lukma@denx.de>
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‎arch/arm/dts/imx28-btt3-0-u-boot.dtsi‎

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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2025
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* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
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*/
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#include "imx28-btt3-u-boot.dtsi"

‎arch/arm/dts/imx28-btt3-1-u-boot.dtsi‎

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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2025
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* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
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*/
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#include "imx28-btt3-u-boot.dtsi"

‎arch/arm/dts/imx28-btt3-2-u-boot.dtsi‎

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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2025
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* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
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*/
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#include "imx28-btt3-u-boot.dtsi"

‎arch/arm/dts/imx28-btt3-u-boot.dtsi‎

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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2025
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* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
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*/
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/*
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* The minimal augmentation DTS U-Boot file to allow eMMC driver
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* configuration in SPL for falcon boot.
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*/
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#include "imx28-u-boot.dtsi"
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/ {
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aliases {
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/delete-property/ saif0;
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/delete-property/ saif1;
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/delete-property/ spi0;
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/delete-property/ spi1;
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/delete-property/ usbphy0;
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/delete-property/ usbphy1;
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};
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apb@80000000 {
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bootph-pre-ram;
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apbh@80000000 {
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bootph-pre-ram;
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};
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apbx@80040000 {
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bootph-pre-ram;
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};
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};
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/delete-node/ keypad;
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/delete-node/ panel;
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/delete-node/ sdio-pwrseq;
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/delete-node/ sound;
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};
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&clks {
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bootph-pre-ram;
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status = "disable";
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};
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&duart {
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/delete-property/ clocks;
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bootph-pre-ram;
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type = <1>; /* TYPE_PL011 */
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};
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&gpio0 {
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bootph-pre-ram;
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};
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&gpio3 {
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bootph-pre-ram;
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};
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&gpio4 {
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bootph-pre-ram;
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};
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&pinctrl {
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/delete-property/ pinctrl-names;
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/delete-property/ pinctrl-0;
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bootph-pre-ram;
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};
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&ssp0 {
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bootph-pre-ram;
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};
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&ssp3 {
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num-cs = <2>;
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spi-max-frequency = <40000000>;
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bootph-pre-ram;
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};
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/delete-node/ &hog_pins_a;
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/delete-node/ &keypad_pins_bttc;
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/delete-node/ &lcdif;
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/delete-node/ &lcdif_sync_pins_bttc;
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/delete-node/ &pwm;
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/delete-node/ &saif0;
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/delete-node/ &saif1;
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/delete-node/ &ssp1;
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/delete-node/ &ssp2;
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/delete-node/ &usb0;
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/delete-node/ &usb1;
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/delete-node/ &usbphy0;
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/delete-node/ &usbphy1;

‎arch/arm/mach-imx/mxs/Kconfig‎

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prompt "MX28 board select"
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optional
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config TARGET_BTT
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bool "Support BTT"
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select PL01X_SERIAL
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imply OF_UPSTREAM
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config TARGET_MX28EVK
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bool "Support mx28evk"
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select PL01X_SERIAL
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from VDD5V) - so the VDD4P2 power source is operational.
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source "board/freescale/mx28evk/Kconfig"
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source "board/liebherr/btt/Kconfig"
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source "board/liebherr/xea/Kconfig"
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endif

‎board/liebherr/btt/Kconfig‎

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if TARGET_BTT
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config SYS_BOARD
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default "btt"
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config SYS_VENDOR
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default "liebherr"
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config SYS_SOC
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default "mxs"
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config SYS_CONFIG_NAME
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default "btt"
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config ENV_SIZE
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default 0x2000
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config ENV_SECT_SIZE
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default 0x10000 if ENV_IS_IN_SPI_FLASH
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config ENV_OFFSET
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default 0x80000 if ENV_IS_IN_SPI_FLASH
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endif

‎board/liebherr/btt/MAINTAINERS‎

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BTT BOARD
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M: Lukasz Majewski <lukma@denx.de>
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S: Maintained
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F: board/liebherr/btt/
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F: include/configs/btt.h
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F: configs/imx28_btt3_defconfig

‎board/liebherr/btt/Makefile‎

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#
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# (C) Copyright 2025
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# Lukasz Majewski, DENX Software Engineering, lukma@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-y := btt.o
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obj-$(CONFIG_XPL_BUILD) += spl_btt.o

‎board/liebherr/btt/boot_img_scr.h‎

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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Struct for boot image source description for placing in last
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* two SPI NOR flash sectors on legcom.
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*/
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struct boot_img_src {
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u8 magic; /* Must be 'B' = 0x42 */
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u8 flags; /* flags to specify mmcblk[0|1] boot[0|1] */
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u8 crc8; /* CRC-8 over above two bytes */
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} __packed;
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/*
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* Bit definition in boot_img_src.flags:
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* Bit 0: mmcblk device 0 or 1 (1 - if this bit set)
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* Bit 1: mmcblk boot partition 0 or 1.
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* for eMMC: boot0 if this bit is cleared, boot1 - if set
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* for SD-card the boot partition value will always be 0
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* (independent of the value of this bit)
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*
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*/
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#define BOOT_SRC_MMC1 BIT(0)
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#define BOOT_SRC_PART1 BIT(1)
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/* Offset of the first boot image source descriptor in SPI NOR */
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#define SPI_FLASH_BOOT_SRC_OFFS 0xFE0000
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#define SPI_FLASH_SECTOR_SIZE 0x10000

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