linux-kernel - Re: [PATCH] hwmon: (peci/cputemp) Add Intel Sapphire Rapids support

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Message-ID: <CABqG17jU8HYzOx=OCH6=shJo37MZWRBPydOQsrnDBk3xNaQE5w@mail.gmail.com>
Date:   Tue, 11 Jul 2023 16:55:39 +0200
From:   Naresh Solanki <naresh.solanki@...ements.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     devicetree@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Iwona Winiarska <iwona.winiarska@...el.com>,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        openbmc@...ts.ozlabs.org
Subject: Re: [PATCH] hwmon: (peci/cputemp) Add Intel Sapphire Rapids support

Hi Guenter,

On Mon, 10 Jul 2023 at 19:43, Guenter Roeck <linux@...ck-us.net> wrote:
>
> On 7/10/23 09:27, Naresh Solanki wrote:
> > From: Patrick Rudolph <patrick.rudolph@...ements.com>
> >
> > Add support to read DTS for reading Intel Sapphire Rapids platform.
> >
> > Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
>
> This patch touches code outside the hwmon subsystem, so I won't be able
> to apply it without Ack from a maintainer.
Yes.  I'll split the patch & resubmit.
~Naresh
>
> Guenter
>
> > ---
> >   drivers/hwmon/peci/cputemp.c | 18 ++++++++++++++++++
> >   drivers/peci/cpu.c           |  5 +++++
> >   2 files changed, 23 insertions(+)
> >
> > diff --git a/drivers/hwmon/peci/cputemp.c b/drivers/hwmon/peci/cputemp.c
> > index e5b65a382772..a812c15948d9 100644
> > --- a/drivers/hwmon/peci/cputemp.c
> > +++ b/drivers/hwmon/peci/cputemp.c
> > @@ -363,6 +363,7 @@ static int init_core_mask(struct peci_cputemp *priv)
> >       switch (peci_dev->info.model) {
> >       case INTEL_FAM6_ICELAKE_X:
> >       case INTEL_FAM6_ICELAKE_D:
> > +     case INTEL_FAM6_SAPPHIRERAPIDS_X:
> >               ret = peci_ep_pci_local_read(peci_dev, 0, reg->bus, reg->dev,
> >                                            reg->func, reg->offset + 4, &data);
> >               if (ret)
> > @@ -531,6 +532,13 @@ static struct resolved_cores_reg resolved_cores_reg_icx = {
> >       .offset = 0xd0,
> >   };
> >
> > +static struct resolved_cores_reg resolved_cores_reg_spr = {
> > +     .bus = 31,
> > +     .dev = 30,
> > +     .func = 6,
> > +     .offset = 0x80,
> > +};
> > +
> >   static const struct cpu_info cpu_hsx = {
> >       .reg            = &resolved_cores_reg_hsx,
> >       .min_peci_revision = 0x33,
> > @@ -549,6 +557,12 @@ static const struct cpu_info cpu_icx = {
> >       .thermal_margin_to_millidegree = &dts_ten_dot_six_to_millidegree,
> >   };
> >
> > +static const struct cpu_info cpu_spr = {
> > +     .reg            = &resolved_cores_reg_spr,
> > +     .min_peci_revision = 0x40,
> > +     .thermal_margin_to_millidegree = &dts_ten_dot_six_to_millidegree,
> > +};
> > +
> >   static const struct auxiliary_device_id peci_cputemp_ids[] = {
> >       {
> >               .name = "peci_cpu.cputemp.hsx",
> > @@ -574,6 +588,10 @@ static const struct auxiliary_device_id peci_cputemp_ids[] = {
> >               .name = "peci_cpu.cputemp.icxd",
> >               .driver_data = (kernel_ulong_t)&cpu_icx,
> >       },
> > +     {
> > +             .name = "peci_cpu.cputemp.spr",
> > +             .driver_data = (kernel_ulong_t)&cpu_spr,
> > +     },
> >       { }
> >   };
> >   MODULE_DEVICE_TABLE(auxiliary, peci_cputemp_ids);
> > diff --git a/drivers/peci/cpu.c b/drivers/peci/cpu.c
> > index de4a7b3e5966..3668a908d259 100644
> > --- a/drivers/peci/cpu.c
> > +++ b/drivers/peci/cpu.c
> > @@ -318,6 +318,11 @@ static const struct peci_device_id peci_cpu_device_ids[] = {
> >               .model  = INTEL_FAM6_ICELAKE_X,
> >               .data   = "icx",
> >       },
> > +     { /* Sapphire Rapids Xeon */
> > +             .family = 6,
> > +             .model  = INTEL_FAM6_SAPPHIRERAPIDS_X,
> > +             .data   = "spr",
> > +     },
> >       { /* Icelake Xeon D */
> >               .family = 6,
> >               .model  = INTEL_FAM6_ICELAKE_D,
> >
> > base-commit: 4dbbaf8fbdbd13adc80731b2452257857e4c2d8b
>