From mboxrd@z Thu Jan 1 00:00:00 1970 From: vinmean Date: Thu, 6 Feb 2020 23:19:37 -0700 (MST) Subject: Modifying uboot of Jetson TX2 board to add additional UART Message-ID: <1581056377691-0.post@n7.nabble.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hello every one, I am new here as well as to u-boot code. I am using nvidia's Jetson TX2 board. I got my self into this task of modifying the u-boot source to add additional uart port for the TX2 board. All I have learnt now is to build and flash the u-boot to the device. The TX2's U-boot that comes with the the board uses UART0 as the debug console. I want to enable additional uart to the u-boot, say uart1. I want to modify the u-boot code to wait for some commands on this port to make booting decisions. I don't know which files to modify. I tried looking into the source code of u-boot and I am unable to figure out where the uart parameters are set. Given that the jetson tx2 board uses Arm Cortex A57 cpu (which is an ARMv8 chip - if I am right) should I be looking into the folder u-boot/arch/arm/cpu/armv8 for enabling uart1/uart2 ? Or is this a board specific modification that needs to be done ? Is my attempt to enable additional UART possible in the first place? Thanks and Regards, Vinmean -- Sent from: http://u-boot.10912.n7.nabble.com/