RE: [PATCH v2] soc: renesas: Add support for reading product revision for RZ/G2L family

[Biju Das]

Hi Geert,


> Subject: Re: [PATCH v2] soc: renesas: Add support for reading product
> revision for RZ/G2L family
> 
> Hi Biju,
> 
> On Wed, Feb 2, 2022 at 10:51 AM Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> wrote:
> > > Subject: Re: [PATCH v2] soc: renesas: Add support for reading
> > > product revision for RZ/G2L family On Fri, Jan 21, 2022 at 2:41 AM
> > > Lad Prabhakar <prabhakar.mahadev- lad.rj@xxxxxxxxxxxxxx> wrote:
> > > > From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> As per RZ/G2L HW
> > > > manual (Rev.1.00 Sep, 2021) DEV_ID [31:28] indicates product
> > > > revision. Use this information to populate the revision info for
> > > > RZ/G2L family.
> > > >
> > > > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > > > Signed-off-by: Lad Prabhakar
> > > > <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> 
> > > > --- a/drivers/soc/renesas/renesas-soc.c
> > > > +++ b/drivers/soc/renesas/renesas-soc.c
> > > > @@ -405,41 +417,38 @@ static int __init renesas_soc_init(void)
> > > >
> > > >                         eshi = ((product >> 4) & 0x0f) + 1;
> > > >                         eslo = product & 0xf;
> > > > +                       soc_dev_attr->revision =
> > > > + kasprintf(GFP_KERNEL,
> > > "ES%u.%u",
> > > > +                                                          eshi,
> eslo);
> > > > +               }  else if (id == &id_rzg2l) {
> > > > +                       eshi =  ((product >> 28) & 0x0f);
> > > > +                       soc_dev_attr->revision =
> > > > + kasprintf(GFP_KERNEL,
> > > "Rev %u",
> > > > +                                                          eshi);
> > >
> > > Would you mind if I would drop the "Rev " while applying?
> >
> > Kernel reports the below message after dropping Rev. Is it OK?
> >
> > [    0.018297] Detected Renesas RZ/G2L r9a07g044 1
> 
> That's indeed not so nice...
> 
> Either we have to add it back, or do something like:

This is much better.

[    0.003427] Detected Renesas RZ/G2L r9a07g044 Rev 1
root@smarc-rzg2l:~# for i in machine family soc_id revision; do echo -n "$i: ";cat /sys/devices/soc0/$i; done
machine: Renesas SMARC EVK based on r9a07g044l2
family: RZ/G2L
soc_id: r9a07g044
revision: 1
root@smarc-rzg2l:~#

> 
> -       pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
> -               soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");
> +       pr_info("Detected Renesas %s %s%s%s\n", soc_dev_attr->family,
> +               soc_dev_attr->soc_id, soc_dev_attr->revision ? " Rev " :
> "",
> +               soc_dev_attr->revision ?: "");
> 

Will you post this change or Do you want me to send the patch?

Please let me know.

Cheers,
Biju