> On Jun 18, 2024, at 01:14, Conor Dooley <conor@xxxxxxxxxx> wrote: > > On Tue, Jun 18, 2024 at 12:39:30AM +0800, Yangyu Chen wrote: >> >> The vendor uses a special intel pxa uart driver, marked deprecated >> in the kernel and incompatible with ns16550. If we use ns16550 in >> the dt, the behavior of uart is like the uart has no interrupt and >> stops working permanently when fifo overruns, making many developers >> not know how to start unless they use the SBI HVC console, which >> needs to turn on CONFIG_NONPORTABLE. > > This I just do not understand. Why did they use this IP? Is it free? > Did they use it before for something else? It's a rather strange design > choice to me. I don't know either. However, PXA is a subfamily of XScale. The kernel also probed the UART as an XScale. So, using XScale compatible string is OK.
