On 5/21/19 6:56 PM, Jagan Teki wrote: > On Tue, May 21, 2019 at 10:14 PM Simon Glass <s...@chromium.org> wrote: >> >> Hi, >> >> (moved from thread "U-Boot PXA support") >> >> We have of-platdata, which produces C data from the DT, for linking >> into U-Boot. It saves libfdt and DT space. But we still have the DM >> overhead. >> >> We have binman which can insert values into the binary after >> link-time. This is barely used at present, only for accessing the >> location of things in flash. >> >> Another thing is that every little tweak and feature adds a few bytes >> and there are dozens of them in each release. It would be interesting >> to build a board from 10 years ago (like PXA) and see where the growth >> is. My bet is that we could add Kconfig options to disable extra >> features (and enhancements of features) and make quite a difference. >> >> For DM, I think it would be interesting to revisit and compare against >> the initial release, and see if some features could be made optional >> in SPL. >> >> Finally I feel we could implement a single-device API for where >> CONFIG_SPL_DM is not set. We could use the debug UART for serial, a >> single instance of tiny MMC for MMC, etc. > > This is what I'm looking for quite sometime, a tiny MMC which would > bypass the mmc stack and do the possible stuff in SPL, since we don't > have any option to use full DM in SPL (specifically for Allwinner 64 > SoC's). API that would atleast compatible with DM with small > foot-print would help.
It's been in mainline for a long time, MMC_TINY. Creator CI20 uses it. -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot