From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mylene Josserand Date: Fri, 11 Nov 2016 19:33:43 +0100 Subject: [U-Boot] sunxi board: why MMC dev are swapped ? Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi everyone, I am currently using FEL and Fastboot to flash a sunxi-device with SPL and u-boot. In my board, I have two MMC devices: a MMC slot and an eMMC. My use-case is to flash an empty device. I want to use FEL to boot a u-boot and then, use fastboot to flash u-boot into eMMC. When I am using an u-boot via FEL, the eMMC is configured as MMC1. To be able to flash u-boot on it, I need to set CONFIG_FASTBOOT_FLASH_MMC_DEV to 1. Thanks to that, the flashboot command is working fine. But when I am booting on my fresh u-boot from eMMC, it is now configured as MMC0 and not MMC1 anymore. It produces some problems in my case as I configured the CONFIG_FASTBOOT_FLASH_MMC_DEV to 1 so I can not use fastboot anymore to flash the eMMC (as, now, fastboot is trying to flash u-boot on my MMC slot and not my eMMC). This is clearly not what I wanted to. I would like to use fastboot to flash the same MMC device: eMMC. This issue is located in this part of the code: http://git.denx.de/?p=u-boot.git;a=blob;f=board/sunxi/board.c;h=53656383d512199338dcdc1d4fdc4f7f939c9b61;hb=HEAD#l377 Do you know why sunxi boards have this behavior ? Why this MMC device's swap is implemented ? Thank you in advance for your help, Best regards, -- Myl?ne Josserand, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com