Hello,
This series add support for USB DFU boot on TI's AM62Px SoC which has two instances of USB Controllers, of which the USB0 instance of USB which is a DWC3 USB Controller is used for USB DFU Boot: ROM => tiboot3.bin => tispl.bin => u-boot.img
The first patch of this series is based on the suggestion of Jonathan Humphreys j-humpreys@ti.com at: https://patchwork.ozlabs.org/project/uboot/cover/20241124070828.617558-1-s-v... which prevents overwriting the "dfu_alt_info" environment variable which is set by "spl_dfu_cmd()" for USB DFU boot.
The second patch adds USB DFU environment for AM62Px.
The third patch extends "am62x_r5_usbdfu.config" config fragment for being re-used by AM62Px SoC by dropping configs which aren't required for USB DFU boot. This is necessary to reduce the size of R5 SPL (tiboot3.bin) built for USB DFU boot.
The fourth patch enables USB device-tree nodes for USB DFU functionality on AM62Px. Since CONFIG_OF_UPSTREAM is not yet supported for AM62Px, the changes are being made in arch/arm/dts/k3-am62p5-sk-u-boot.dtsi at the moment, with the intent of making the same changes in the Linux device-tree and eventually enabling CONFIG_OF_UPSTREAM to drop the changes made in "k3-am62p5-sk-u-boot.dtsi".
Series is based on commit 3b3c7280b82 smbios: address build warning of the next branch of U-Boot.
The USB DFU config fragments for AM62x are to be re-used for enabling USB DFU boot on AM62Px as follows: R5 => am62px_evm_r5_defconfig + am62x_r5_usbdfu.config A53 => am62px_evm_a53_defconfig + am62x_a53_usbdfu.config
Series has been tested on AM62P5-SK. Logs validating USB DFU boot on AM62P5-SK with this series: https://gist.github.com/Siddharth-Vadapalli-at-TI/50198ee3348c2db73e0dbd3a14...
Series has also been validated on AM625-SK to ensure that the changes made to "am62x_r5_usbdfu.config" config fragment being used by AM625-SK for USB DFU boot do not cause a regression on AM625-SK w.r.t. USB DFU boot. Logs validating USB DFU Boot on AM625-SK with this series: https://gist.github.com/Siddharth-Vadapalli-at-TI/85a7579ed2c95330ac71ee3a83...
Regards, Siddharth.
Jonathan Humphreys (1): dfu: do not overwrite "dfu_alt_info"
Siddharth Vadapalli (3): board: ti: am62px: env: include environment for DFU Boot configs: am62x_r5_usbdfu: extend for AM62Px arm: dts: k3-am62p5-sk-u-boot: enable USB0 for USB DFU boot
arch/arm/dts/k3-am62p5-sk-u-boot.dtsi | 10 ++++++++++ board/ti/am62px/am62px.env | 5 +++-- configs/am62x_r5_usbdfu.config | 3 +++ drivers/dfu/dfu.c | 7 +++++-- 4 files changed, 21 insertions(+), 4 deletions(-)