On 22:03 Thu 04 Jul , Jisheng Zhang wrote: > On Wed, Jul 03, 2024 at 02:55:09PM +0000, Yixun Lan wrote: > > Found SpacemiT's K1 uart controller is compatible with > > Intel's Xscale uart, but it's still worth to introduce a new compatible. > > Per vendor's kernel source code, all the uarts support 64Bytes FIFO. > So if it's compatible with Xscale, it's a xscale uart 64 Bytes FIFO. yes, I agree further question would how to implement specific support for spacemit's k1 SoC one possible option to add a PORT_SPACEMIT compatible data to 8250_port.c - uart_config[] > >From this PoV, the uart isn't a Xscale but a mrvl pxa. see my previous comment, probably need further clarification/investigation.. > > But I have one question: is the uart really a mrvl/intel pxa uart? or is just No, I'm unable to answer this, I'm not an employee of SpacemiT All informations are based on public available source + docs.. > reg programming compatible with pxa? > To my knowledge, it's compatible with pxa, but it would be great that vendor can clarify this > > > > Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> > > Signed-off-by: Yixun Lan <dlan@xxxxxxxxxx> > > --- > > Documentation/devicetree/bindings/serial/8250.yaml | 4 +++- > > 1 file changed, 3 insertions(+), 1 deletion(-) > > > > diff --git a/Documentation/devicetree/bindings/serial/8250.yaml b/Documentation/devicetree/bindings/serial/8250.yaml > > index 692aa05500fd5..0bde2379e8647 100644 > > --- a/Documentation/devicetree/bindings/serial/8250.yaml > > +++ b/Documentation/devicetree/bindings/serial/8250.yaml > > @@ -111,7 +111,9 @@ properties: > > - mediatek,mt7623-btif > > - const: mediatek,mtk-btif > > - items: > > - - const: mrvl,mmp-uart > > + - enum: > > + - mrvl,mmp-uart > > + - spacemit,k1-uart > > - const: intel,xscale-uart > > - items: > > - enum: > > > > -- > > 2.45.2 > > > > > > _______________________________________________ > > linux-riscv mailing list > > linux-riscv@xxxxxxxxxxxxxxxxxxx > > http://lists.infradead.org/mailman/listinfo/linux-riscv -- Yixun Lan (dlan) Gentoo Linux Developer GPG Key ID AABEFD55
