Alexander Stein <alexander.stein@xxxxxxxxxxx> writes: > Hi, > > Am Freitag, 29. Januar 2021, 09:07:45 CET schrieb Neil Armstrong: >> On 28/01/2021 00:08, Alexander Stein wrote: >> > Recently introduced async probe on mmc devices can shuffle block IDs. >> > Pin them to fixed values to ease booting in environments where UUIDs >> > are not practical. Use newly introduced aliases for mmcblk devices from > [1]. >> > [1] >> > https://patchwork.kernel.org/patch/11747669/ >> >> I understand the goal, and this should be done for _all_ boards, not only > the Odroid-N2. > > I see. So there are 2 options: > 1. > Set the mapping for all 3 sd_emmc_* in the top-most .dtsi > Upside: very easy patch > Downside: When sd_emmc_a is not enabled "mmc0" will never be available. > Might be confusing. sd_emmc_a is (almost?) always the iface used for SDIO devices, which are not always present. I would recommend we go with a single mapping in the top-level .dtsi SD card -> mmc0 (sd_emmc_b) eMMC -> mmc1 (sd_emmc_c) SDIO -> mmc2 (sd_emmc_a) it's not exactly obvious why we don't go 0,1,2 == A,B,C but just document it in the top-level .dtsi. This approach also has the benefit of having the devices show up how many/most boards showed up before the async probe changes. Kevin
