Re: [PATCH v2 2/3] arm64: dts: ti: Introduce J742S2 SoC family

Manorit Chawdhry
2024-07-31T04:20:09Z

Hi Nishanth,

On 07:33-20240730, Nishanth Menon wrote:
> On 12:43-20240730, Manorit Chawdhry wrote:
> > This device is a subset of J784S4 and shares the same memory map and
> > thus the nodes are being reused from J784S4 to avoid duplication.
> >
> > Here are some of the salient features of the J742S2 automotive grade
> > application processor:
> >
> > The J742S2 SoC belongs to the K3 Multicore SoC architecture platform,
> > providing advanced system integration in automotive, ADAS and industrial
> > applications requiring AI at the network edge. This SoC extends the K3
> > Jacinto 7 family of SoCs with focus on raising performance and
> > integration while providing interfaces, memory architecture and compute
> > performance for multi-sensor, high concurrency applications.
> >
> > Some changes that this devices has from J784S4 are:
> > * 4x Cortex-A72 vs 8x Cortex-A72
> > * 3x C7x DSP vs 4x C7x DSP
> > * 4 port ethernet switch vs 8 port ethernet switch
> >
> > ( Refer Table 2-1 for Device comparison with J7AHP )
> > Link: https://www.ti.com/lit/pdf/spruje3 (TRM)
> > Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
> > ---
> > arch/arm64/boot/dts/ti/k3-j742s2-main.dtsi | 44 ++++++++++++++++++++++++++++++
> > arch/arm64/boot/dts/ti/k3-j742s2.dtsi | 26 ++++++++++++++++++
> > 2 files changed, 70 insertions(+)
> >
[...]
> > + */
> > +
> > +#include "k3-j784s4.dtsi"
> > +
> > +/ {
> > + model = "Texas Instruments K3 J742S2 SoC";
> > + compatible = "ti,j742s2";
> > +
> > + cpus {
> > + cpu-map {
> > + /delete-node/ cluster1;
> > + };
> > + };
> > +
> > + /delete-node/ cpu4;
> > + /delete-node/ cpu5;
> > + /delete-node/ cpu6;
> > + /delete-node/ cpu7;
>
> I suggest refactoring by renaming the dtsi files as common and split out
> j784s4 similar to j722s/am62p rather than using /delete-node/
>

I don't mind the suggestion Nishanth if there is a reason behind it.
Could you tell why we should not be using /delete-node/?

Regards,
Manorit

>
> > +};
> > +
> > +#include "k3-j742s2-main.dtsi"
> >
> > --
> > 2.45.1
> >
>
> --
> Regards,
> Nishanth Menon
> Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D