Re: [PATCH v3 1/2] hw/gpio: add K230 GPIO controller model

Hi Junze,

On Fri, Aug 14, 2026 at 5:21 PM Junze Cao <[email protected]> wrote:
>
> On 2026-08-14 15:26:41+08:00, Bin Meng wrote:
> > On Mon, Aug 10, 2026 at 4:02 AM guochun wang <[email protected]> wrote:
> >
> > > Implement a K230 SoC APB GPIO controller model for QEMU, derived from
> > > the Synopsys DesignWare APB GPIO (the Linux gpio-k230 driver is based
> > > on gpio-dwapb.c and shares the same register layout), with a
> > > Canaan-specific compatible ("canaan,k230-apb-gpio") and hardlock
> > > integration. The model is capable of running the Linux gpio-k230 driver
> > > and driving external input/output lines. Behaviour follows the K230
> > > Technical Reference Manual v0.3.1.
> >
> > Please split the k230_gpio model into 2 separate models:
> >
> > - One is generic Synopsys DesignWare GPIO IP model
> > - Optional Canann K230 specific wrapper glue model to the dw-gpio IP
> > (if the generic Synopsys DesignWare GPIO IP model, or plus some unimp
> > region, is good enough to make the software happy, no need to create
> > this one)
>
> Hi Bin Meng,
>
> Thanks for the detailed review.
> Regarding the suggestion to abstract this into a generic Synopsys DesignWare APB GPIO model, I have a question: do you know of any other QEMU SoCs that use this IP and would benefit from a shared model?
> If there is no immediate second user, I wonder whether it might be premature to generalize now, especially while we still need to complete the K230-specific behavior.
>

There is no other immediate second user as far as I know. But Synopsys
DesignWare IP is not like others, and it's commonly seen on many SoCs.

For RISC-V, I can see Eswin EIC7700, Sophgo CV1800B (Milk-V Duo),
Sophgo SG2042 / SG2044 and T-Head TH1520 (Lichee Pi 4A) all use the
same Synopsys GPIO IP, and they are all good candidate of QEMU models
in the future.

What K230-specific behavior are you concerned about?

Regards,
Bin