On 29. 03. 19 11:13, Jean-Jacques Hiblot wrote: > > On 28/03/2019 14:54, Michal Simek wrote: >> On 25. 03. 19 9:08, Michal Simek wrote: >>> On 22. 03. 19 15:39, Jean-Jacques Hiblot wrote: >>>> The purpose of this series is to provide the SPL with ability to apply >>>> overlays for u-boot. this is only a RFC so far, to get a feedback on >>>> the >>>> approach. >>>> >>>> Our use-case is the support of the daughter boards of the AM65x EVM. In >>>> Linux, each board is supported by a unique overlay. The presence of the >>>> boards is detected at runtime, and some useful features (like USB) are >>>> implemented on those daughter boards. Instead of providing multiple >>>> dtbs >>>> and fall in a combinatorial pit, we propose to use DT overlays. >>> Not sure if you have it on these boards too but I expect you are able to >>> detect base board with this code board/ti/common/board_detect.c >>> >>> How do you detect these daughter cards? Is there additional I2C >>> connection to them and they have on board eeprom with any format for >>> detection? > Yes. There is EEPROM and GPIOs involved in the detection process.
Does that mean that you use gpio bitbanging i2c eeprom to read information? >>> Something similar what it is part of FMC standard/VITA 57.1 with using >>> FRU spec for daughter card description? >>> Anyway we are working on FRU parser exactly for this purpose. >>> >>> Do you also need to apply that overlays in SPL? > We need to apply in SPL so that u-boot has the right information in the DT. >>> Isn't it enough to apply them as the part of board_fdt_blob_setup()? > No it's possible to do that in board_fdt_blob_setup(). A little bit confused by your response. yes/no? >> I see v2 now but without answering my questions here. > > Yes I had prepared the answer and forgot to push the send button. > > in the V2 the biggest change is when the list of additional images is > obtained from the board. It is now in spl_fit_get_image_name() and that > makes its usable for other kind of binaries than just overlays. Yes I have seen that. Give me some time to test this. As I said V2 looks better. M _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
