On Mon, Jan 30, 2023 at 11:56:20PM +1100, John Watts wrote: > On Mon, Jan 30, 2023 at 01:31:42PM +0100, Sascha Hauer wrote: > > As said, the code is also for other i.MX SoCs, so a fixed base address > > won't do it. You would first have to detect the SoC type, but we can > > only get this from the device tree. > > > > I'm afraid there is no good solution for this problem, at least we > > haven't found any over the years. > > > > Sascha > > Oh right, because Barebox does multi-image builds. That is an unsatisfying > problem but it makes sense. > > So for this patch I imagine I should just take the udelay you've written, > use the I2C registers as the base address and just poke around for a while? Yes, sounds good. > > I'm still unsure on how to test this- can I just disable the MMU and dcache > in board.c and do some prints with some type of timer? You can't disable MMU during runtime, but you can compile without MMU support, just disable CONFIG_MMU. However, the early I2C code already runs with MMU disabled, can't you just put in some test code there? Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
