linux-kernel - Re: [PATCH 4/4] hwmon: (occ) Add soft minimum power cap attribute

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Message-ID: <CACPK8Xe+M97Covu0+Qc9M-8vdCc9pTXfZjJ9y6_Xm-j1E4GUPQ@mail.gmail.com>
Date:   Wed, 16 Feb 2022 06:33:56 +0000
From:   Joel Stanley <joel@....id.au>
To:     Eddie James <eajames@...ux.ibm.com>
Cc:     linux-hwmon@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH 4/4] hwmon: (occ) Add soft minimum power cap attribute

On Tue, 15 Feb 2022 at 15:11, Eddie James <eajames@...ux.ibm.com> wrote:
>
> Export the power caps data for the soft minimum power cap through hwmon.
>
> Signed-off-by: Eddie James <eajames@...ux.ibm.com>
> ---
>  drivers/hwmon/occ/common.c | 19 ++++++++++++++++---
>  1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c
> index 0cb4a0a6cbc1..f00cd59f1d19 100644
> --- a/drivers/hwmon/occ/common.c
> +++ b/drivers/hwmon/occ/common.c
> @@ -674,6 +674,9 @@ static ssize_t occ_show_caps_3(struct device *dev,
>         case 7:
>                 val = caps->user_source;
>                 break;
> +       case 8:
> +               val = get_unaligned_be16(&caps->soft_min) * 1000000ULL;
> +               break;
>         default:
>                 return -EINVAL;
>         }
> @@ -835,12 +838,13 @@ static int occ_setup_sensor_attrs(struct occ *occ)
>         case 1:
>                 num_attrs += (sensors->caps.num_sensors * 7);
>                 break;
> -       case 3:
> -               show_caps = occ_show_caps_3;
> -               fallthrough;
>         case 2:
>                 num_attrs += (sensors->caps.num_sensors * 8);
>                 break;
> +       case 3:
> +               show_caps = occ_show_caps_3;
> +               num_attrs += (sensors->caps.num_sensors * 9);

How do we know this changed from 8 to 9?

We should start adding links to the occ source code, or a similar
reference, when making these changes so they can be reviewed.

> +               break;
>         default:
>                 sensors->caps.num_sensors = 0;
>         }
> @@ -1047,6 +1051,15 @@ static int occ_setup_sensor_attrs(struct occ *occ)
>                         attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
>                                                      show_caps, NULL, 7, 0);
>                         attr++;
> +
> +                       if (sensors->caps.version > 2) {
> +                               snprintf(attr->name, sizeof(attr->name),
> +                                        "power%d_cap_min_soft", s);
> +                               attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
> +                                                            show_caps, NULL,
> +                                                            8, 0);
> +                               attr++;
> +                       }
>                 }
>         }
>
> --
> 2.27.0
>