On Thu, 5 Aug 2021 at 01:20, Tao Ren <rentao.bupt@xxxxxxxxx> wrote:
>
> On Thu, Aug 05, 2021 at 12:28:02AM +0000, Joel Stanley wrote:
> > On Wed, 28 Jul 2021 at 23:38, <rentao.bupt@xxxxxxxxx> wrote:
> > >
> > > From: Tao Ren <rentao.bupt@xxxxxxxxx>
> > >
> > > Add initial version of device tree for Facebook Fuji (AST2600) BMC.
> >
> > I like to read what kind of platform the BMC is going into if you can
> > add that detail, but it's not essential.
>
> Sure. I will add more details in v2.
>
> > > +&spi1 {
> > > + status = "okay";
> > > +
> > > + /*
> > > + * Customize spi1 flash memory size to 32MB (maximum flash size on
> > > + * the bus) to save vmalloc space.
> > > + */
> > > + reg = < 0x1e630000 0xc4
> > > + 0x30000000 0x2000000 >;
> >
> > Which driver supports this?
> >
> > It would be great to see Facebook work to get the SPI NOR driver for
> > the ast2600 merged to mainline.
> >
> > I doubt the IBM team will get to this, as we are using eMMC instead.
>
> Ah, I just checked aspeed-g6.dtsi (ast2600-spi) in mainline and I thought
> the driver patches were also upstreamed. Let me remove the entry for now,
> and will add it back when the driver is ready.
If it helps you, I don't mind it staying in your dts. I would like to
see some effort on the driver though.
>
> >
> > > +
> > > + flash@0 {
> > > + status = "okay";
> > > + m25p,fast-read;
> > > + label = "spi1.0";
> > > + spi-max-frequency = <5000000>;
> > > +
> > > + partitions {
> > > + compatible = "fixed-partitions";
> > > + #address-cells = <1>;
> > > + #size-cells = <1>;
> > > +
> > > + flash1@0 {
> > > + reg = <0x0 0x2000000>;
> > > + label = "system-flash";
> > > + };
> > > + };
> > > + };
> > > +};
> >
> > > +&ehci1 {
> > > + status = "okay";
> > > +};
> >
> > Have you verified that USB works with mainline? I've had reports of it
> > working on 5.8 but it seems to have regressed as of v5.10.
>
> It stopped working on ASPEED since commit 280a9045bb18 ("ehci: fix EHCI
> host controller initialization sequence"): ehci_handshake() returns
> error because HCHalted bit EHCI24[12] stays at 1.
>
> I have a dirty hack in my tree (ignoring the halt bit) and it "works" on
> AST2500 and AST2600. Let me send an email to openbmc and aspeed email
> groups to see if anyone has more context.
We discovered the same, except in my testing it wasn't actually
"working" on my EVB. I have a A3 EVB on my desk and when plugging in a
USB key nothing happened.
>
> Meanwhile, should I delete the entry until the fix is ready in driver?
Again, leave it in I think.
>
> > > +&mdio1 {
> > > + status = "okay";
> > > +
> > > + ethphy3: ethernet-phy@13 {
> > > + compatible = "ethernet-phy-ieee802.3-c22";
> > > + reg = <0x0d>;
> > > + };
> > > +};
> > > +
> > > +&mac3 {
> > > + phy-handle = <ðphy3>;
> >
> > status = okay?
> >
> > You should specify the pinmux too I think, even if the default happens
> > to work, so that other devices cannot claim the pins.
>
> status is set in ast2600 common dtsi, but let me set it here to avoid
> confusion. Will update pinmux in v2. Thanks.
Are you looking at mainline? I think it's disabled by default there:
https://elixir.bootlin.com/linux/latest/source/arch/arm/boot/dts/aspeed-g6.dtsi#L246
>
> >
> > Cheers,
> >
> > Joel
>
> Cheers,
>
> Tao
