Hi, On 29-08-2013 16:12, Eduardo Valentin wrote: > When registering a new thermal_device, the thermal framework > will always add a hwmon sysfs interface. > > This patch adds a flag to make this behavior optional. Now > when registering a new thermal device, the caller can > optionally inform if hwmon interface is desirable. This can > be done by means of passing a thermal_zone_params.no_hwmon == true. > > In order to keep same behavior as of today, all current > calls will by default create the hwmon interface. > > Cc: linux-arm-ker...@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Cc: linux...@vger.kernel.org > Cc: Zhang Rui <rui.zh...@intel.com> > Suggested-by: Wei Ni <w...@nvidia.com> > Signed-off-by: Eduardo Valentin <eduardo.valen...@ti.com> > --- > Documentation/thermal/sysfs-api.txt | 5 +++++ > drivers/thermal/thermal_core.c | 8 +++++--- > include/linux/thermal.h | 8 ++++++++ > 3 files changed, 18 insertions(+), 3 deletions(-) > --- > > Hello all, > > So, here is then a different way of implementing same feature. > As requested by Rui, now the flag goes via thermal_zone_params, > because this seams to be the preferred way, at least in near future. > > Using this method the amount of subsystems involved is reduced to 1: > thermal, as requested by Raphael. I just made is a negative flag > in order to keep the same behavior of the existing drivers, without > changing them. The flag is documented though. >
Objections on this way of adding this flag?
Rui,
If you are OK, I can add this series to my tree too.
> All best,
>
>
> diff --git a/Documentation/thermal/sysfs-api.txt
> b/Documentation/thermal/sysfs-api.txt
> index a71bd5b..37c5486 100644
> --- a/Documentation/thermal/sysfs-api.txt
> +++ b/Documentation/thermal/sysfs-api.txt
> @@ -142,6 +142,11 @@ temperature) and throttle appropriate devices.
> This is an optional feature where some platforms can choose not to
> provide this data.
> .governor_name: Name of the thermal governor used for this zone
> + .no_hwmon: a boolean to indicate if the thermal to hwmon sysfs interface
> + is required. when no_hwmon == false, a hwmon sysfs interface
> + will be created. when no_hwmon == true, nothing will be done.
> + In case the thermal_zone_params is NULL, the hwmon interface
> + will be created (for backward compatibility).
> .num_tbps: Number of thermal_bind_params entries for this zone
> .tbp: thermal_bind_params entries
>
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 247528b..51648bf 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -1462,9 +1462,11 @@ struct thermal_zone_device
> *thermal_zone_device_register(const char *type,
>
> mutex_unlock(&thermal_governor_lock);
>
> - result = thermal_add_hwmon_sysfs(tz);
> - if (result)
> - goto unregister;
> + if (!tz->tzp || !tz->tzp->no_hwmon) {
> + result = thermal_add_hwmon_sysfs(tz);
> + if (result)
> + goto unregister;
> + }
>
> mutex_lock(&thermal_list_lock);
> list_add_tail(&tz->node, &thermal_tz_list);
> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> index a386a1c..b4a975f 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -214,6 +214,14 @@ struct thermal_bind_params {
> /* Structure to define Thermal Zone parameters */
> struct thermal_zone_params {
> char governor_name[THERMAL_NAME_LENGTH];
> +
> + /*
> + * a boolean to indicate if the thermal to hwmon sysfs interface
> + * is required. when no_hwmon == false, a hwmon sysfs interface
> + * will be created. when no_hwmon == true, nothing will be done
> + */
> + bool no_hwmon;
> +
> int num_tbps; /* Number of tbp entries */
> struct thermal_bind_params *tbp;
> };
>
--
You have got to be excited about what you are doing. (L. Lamport)
Eduardo Valentin
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