Re: [PATCH 0/4] Initial patch set for PURWA-IOT-EVK

[Yijie Yang]

On 12/24/2025 3:09 AM, Dmitry Baryshkov wrote:
> On Tue, Dec 23, 2025 at 06:27:05PM +0100, Konrad Dybcio wrote:
> > On 12/23/25 3:12 AM, Yijie Yang wrote:
> > > On 12/22/2025 5:18 PM, Dmitry Baryshkov wrote:
> > > > On Mon, Dec 22, 2025 at 02:03:25PM +0800, YijieYang wrote:
> > > > > From: Yijie Yang <yijie.yang@xxxxxxxxxxxxxxxx>
> > > > >
> > > > > Introduce the device tree, DT bindings, and driver modifications required
> > > > > to bring up the PURWA-IOT-EVK evaluation board.
> > > > >
> > > > > Purwa and Hamoa are IoT variants of x1p42100 and x1e80100, both based on
> > > > > the IQ-X SoC series. Consequently, the two common files in this series are
> > > > > prefixed with 'iq-x-iot' to reflect this relationship.
> > > > >
> > > > > PURWA-IOT-EVK shares almost the same hardware design with HAMOA-IOT-EVK,
> > > > > except for differences in the BOM. As a result, most of the DTS can be
> > > > > shared between them.
> > > > >
> > > > > The changes focus on two key hardware components: the PURWA-IOT-SOM and
> > > > > the PURWA-IOT-EVK carrier board.
> > > > >
> > > > > Hardware delta between Hamoa and Purwa:
> > > > > - Display: Purwa’s display uses a different number of clocks, and its
> > > > >     frequency differs from Hamoa.
> > > > > - GPU: Purwa requires a separate firmware compared to Hamoa.
> > > >
> > > > Is it just a separate firmware, or does it use a different _GPU_?
> > >
> > > It uses a different GPU.
> >
> > I think it would be useful to call this paragraph "Hardware delta between
> > Hamoa-IoT-SoM/EVK and Purwa-IoT-whatever - because now Dmitry is asking
> > about differences between Hamoa-the-SoC and Purwa-the-SoC which we
> > expressed in purwa.dtsi
>
> Nah, I pointed out that the letter is incorrect. It's not just a
> different firmware for the _same_ GPU. It's a different GPU revision.

I’ll update the description here.

>

--
Best Regards,
Yijie