Commit ccba4ffd authored by Eduardo Valentin's avatar Eduardo Valentin
Browse files

drivers: thermal: make usage of CONFIG_THERMAL_HWMON optional 



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: David Woodhouse <dwmw2@infradead.org>
Cc: linux-acpi@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: Zhang Rui <rui.zhang@intel.com>
Suggested-by: default avatarWei Ni <wni@nvidia.com>
Signed-off-by: default avatarEduardo Valentin <eduardo.valentin@ti.com>
parent b82715fd

Documentation/thermal/sysfs-api.txt

+5 −0
Original line number Diff line number Diff line
@@ -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

drivers/thermal/thermal_core.c

+5 −3
Original line number Diff line number Diff line
@@ -1462,9 +1462,11 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, 


	mutex_unlock(&thermal_governor_lock);



	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);

include/linux/thermal.h

+8 −0
Original line number Diff line number Diff line
@@ -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;

};

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