Re: [PATCH v7 07/11] thermal: Use mode helpers in drivers

[Amit Kucheria <amit.kucheria@verdurent.com>]

On Mon, Jun 29, 2020 at 5:59 PM Andrzej Pietrasiewicz
<andrzej.p@collabora.com> wrote:
>
> Use thermal_zone_device_{en|dis}able() and thermal_zone_device_is_enabled().
>
> Consequently, all set_mode() implementations in drivers:
>
> - can stop modifying tzd's "mode" member,
> - shall stop taking tzd's lock, as it is taken in the helpers
> - shall stop calling thermal_zone_device_update() as it is called in the
> helpers
> - can assume they are called when the mode truly changes, so checks to
> verify that can be dropped
>
> Not providing set_mode() by a driver no longer prevents the core from
> being able to set tzd's mode, so the relevant check in mode_store() is
> removed.
>
> Other comments:
>
> - acpi/thermal.c: tz->thermal_zone->mode will be updated only after we
> return from set_mode(), so use function parameter in thermal_set_mode()
> instead, no need to call acpi_thermal_check() in set_mode()
> - thermal/imx_thermal.c: regmap writes and mode assignment are done in
> thermal_zone_device_{en|dis}able() and set_mode() callback
> - thermal/intel/intel_quark_dts_thermal.c: soc_dts_{en|dis}able() are a
> part of set_mode() callback, so they don't need to modify tzd->mode, and
> don't need to fall back to the opposite mode if unsuccessful, as the return
> value will be propagated to thermal_zone_device_{en|dis}able() and
> ultimately tzd's member will not be changed in thermal_zone_device_set_mode().
> - thermal/of-thermal.c: no need to set zone->mode to DISABLED in
> of_parse_thermal_zones() as a tzd is kzalloc'ed so mode is DISABLED anyway
>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
> [for acerhdf]
> Acked-by: Peter Kaestle <peter@piie.net>

Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>

> ---
>  drivers/acpi/thermal.c                        | 21 ++++++-----
>  .../ethernet/mellanox/mlxsw/core_thermal.c    | 37 +++++++++----------
>  drivers/platform/x86/acerhdf.c                | 17 +++++----
>  drivers/thermal/da9062-thermal.c              |  6 ++-
>  drivers/thermal/hisi_thermal.c                |  6 ++-
>  drivers/thermal/imx_thermal.c                 | 33 +++++++----------
>  .../intel/int340x_thermal/int3400_thermal.c   |  5 +--
>  .../thermal/intel/intel_quark_dts_thermal.c   | 18 ++-------
>  drivers/thermal/rockchip_thermal.c            |  6 ++-
>  drivers/thermal/sprd_thermal.c                |  6 ++-
>  drivers/thermal/thermal_core.c                |  2 +-
>  drivers/thermal/thermal_of.c                  | 10 +----
>  drivers/thermal/thermal_sysfs.c               | 11 ++----
>  13 files changed, 80 insertions(+), 98 deletions(-)
>
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 592be97c4456..52b6cda1bcc3 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -499,7 +499,7 @@ static void acpi_thermal_check(void *data)
>  {
>         struct acpi_thermal *tz = data;
>
> -       if (tz->thermal_zone->mode != THERMAL_DEVICE_ENABLED)
> +       if (!thermal_zone_device_is_enabled(tz->thermal_zone))
>                 return;
>
>         thermal_zone_device_update(tz->thermal_zone,
> @@ -542,14 +542,11 @@ static int thermal_set_mode(struct thermal_zone_device *thermal,
>         if (mode == THERMAL_DEVICE_DISABLED)
>                 pr_warn("thermal zone will be disabled\n");
>
> -       if (mode != tz->thermal_zone->mode) {
> -               tz->thermal_zone->mode = mode;
> -               ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> -                       "%s kernel ACPI thermal control\n",
> -                       tz->thermal_zone->mode == THERMAL_DEVICE_ENABLED ?
> -                       "Enable" : "Disable"));
> -               acpi_thermal_check(tz);
> -       }
> +       ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> +               "%s kernel ACPI thermal control\n",
> +               mode == THERMAL_DEVICE_ENABLED ?
> +               "Enable" : "Disable"));
> +
>         return 0;
>  }
>
> @@ -897,13 +894,17 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>                 goto remove_dev_link;
>         }
>
> -       tz->thermal_zone->mode = THERMAL_DEVICE_ENABLED;
> +       result = thermal_zone_device_enable(tz->thermal_zone);
> +       if (result)
> +               goto acpi_bus_detach;
>
>         dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
>                  tz->thermal_zone->id);
>
>         return 0;
>
> +acpi_bus_detach:
> +       acpi_bus_detach_private_data(tz->device->handle);
>  remove_dev_link:
>         sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
>  remove_tz_link:
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> index ad61b2db30b8..4fb73d0fd167 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> @@ -280,18 +280,11 @@ static int mlxsw_thermal_set_mode(struct thermal_zone_device *tzdev,
>  {
>         struct mlxsw_thermal *thermal = tzdev->devdata;
>
> -       mutex_lock(&tzdev->lock);
> -
>         if (mode == THERMAL_DEVICE_ENABLED)
>                 tzdev->polling_delay = thermal->polling_delay;
>         else
>                 tzdev->polling_delay = 0;
>
> -       tzdev->mode = mode;
> -       mutex_unlock(&tzdev->lock);
> -
> -       thermal_zone_device_update(tzdev, THERMAL_EVENT_UNSPECIFIED);
> -
>         return 0;
>  }
>
> @@ -458,19 +451,11 @@ static int mlxsw_thermal_module_mode_set(struct thermal_zone_device *tzdev,
>         struct mlxsw_thermal_module *tz = tzdev->devdata;
>         struct mlxsw_thermal *thermal = tz->parent;
>
> -       mutex_lock(&tzdev->lock);
> -
>         if (mode == THERMAL_DEVICE_ENABLED)
>                 tzdev->polling_delay = thermal->polling_delay;
>         else
>                 tzdev->polling_delay = 0;
>
> -       tzdev->mode = mode;
> -
> -       mutex_unlock(&tzdev->lock);
> -
> -       thermal_zone_device_update(tzdev, THERMAL_EVENT_UNSPECIFIED);
> -
>         return 0;
>  }
>
> @@ -756,8 +741,11 @@ mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
>                 return err;
>         }
>
> -       module_tz->tzdev->mode = THERMAL_DEVICE_ENABLED;
> -       return 0;
> +       err = thermal_zone_device_enable(module_tz->tzdev);
> +       if (err)
> +               thermal_zone_device_unregister(module_tz->tzdev);
> +
> +       return err;
>  }
>
>  static void mlxsw_thermal_module_tz_fini(struct thermal_zone_device *tzdev)
> @@ -860,6 +848,7 @@ static int
>  mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
>  {
>         char tz_name[MLXSW_THERMAL_ZONE_MAX_NAME];
> +       int ret;
>
>         snprintf(tz_name, sizeof(tz_name), "mlxsw-gearbox%d",
>                  gearbox_tz->module + 1);
> @@ -872,8 +861,11 @@ mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
>         if (IS_ERR(gearbox_tz->tzdev))
>                 return PTR_ERR(gearbox_tz->tzdev);
>
> -       gearbox_tz->tzdev->mode = THERMAL_DEVICE_ENABLED;
> -       return 0;
> +       ret = thermal_zone_device_enable(gearbox_tz->tzdev);
> +       if (ret)
> +               thermal_zone_device_unregister(gearbox_tz->tzdev);
> +
> +       return ret;
>  }
>
>  static void
> @@ -1041,10 +1033,15 @@ int mlxsw_thermal_init(struct mlxsw_core *core,
>         if (err)
>                 goto err_unreg_modules_tzdev;
>
> -       thermal->tzdev->mode = THERMAL_DEVICE_ENABLED;
> +       err = thermal_zone_device_enable(thermal->tzdev);
> +       if (err)
> +               goto err_unreg_gearboxes;
> +
>         *p_thermal = thermal;
>         return 0;
>
> +err_unreg_gearboxes:
> +       mlxsw_thermal_gearboxes_fini(thermal);
>  err_unreg_modules_tzdev:
>         mlxsw_thermal_modules_fini(thermal);
>  err_unreg_tzdev:
> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
> index 58c4e1caaa09..8fe0ecb6a626 100644
> --- a/drivers/platform/x86/acerhdf.c
> +++ b/drivers/platform/x86/acerhdf.c
> @@ -397,19 +397,16 @@ static inline void acerhdf_revert_to_bios_mode(void)
>  {
>         acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
>         kernelmode = 0;
> -       if (thz_dev) {
> -               thz_dev->mode = THERMAL_DEVICE_DISABLED;
> +       if (thz_dev)
>                 thz_dev->polling_delay = 0;
> -       }
> +
>         pr_notice("kernel mode fan control OFF\n");
>  }
>  static inline void acerhdf_enable_kernelmode(void)
>  {
>         kernelmode = 1;
> -       thz_dev->mode = THERMAL_DEVICE_ENABLED;
>
>         thz_dev->polling_delay = interval*1000;
> -       thermal_zone_device_update(thz_dev, THERMAL_EVENT_UNSPECIFIED);
>         pr_notice("kernel mode fan control ON\n");
>  }
>
> @@ -723,6 +720,8 @@ static void acerhdf_unregister_platform(void)
>
>  static int __init acerhdf_register_thermal(void)
>  {
> +       int ret;
> +
>         cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,
>                                                  &acerhdf_cooling_ops);
>
> @@ -736,8 +735,12 @@ static int __init acerhdf_register_thermal(void)
>         if (IS_ERR(thz_dev))
>                 return -EINVAL;
>
> -       thz_dev->mode = kernelmode ?
> -               THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED;
> +       if (kernelmode)
> +               ret = thermal_zone_device_enable(thz_dev);
> +       else
> +               ret = thermal_zone_device_disable(thz_dev);
> +       if (ret)
> +               return ret;
>
>         if (strcmp(thz_dev->governor->name,
>                                 acerhdf_zone_params.governor_name)) {
> diff --git a/drivers/thermal/da9062-thermal.c b/drivers/thermal/da9062-thermal.c
> index a7ac8afb063e..4d74994f160a 100644
> --- a/drivers/thermal/da9062-thermal.c
> +++ b/drivers/thermal/da9062-thermal.c
> @@ -237,7 +237,11 @@ static int da9062_thermal_probe(struct platform_device *pdev)
>                 ret = PTR_ERR(thermal->zone);
>                 goto err;
>         }
> -       thermal->zone->mode = THERMAL_DEVICE_ENABLED;
> +       ret = thermal_zone_device_enable(thermal->zone);
> +       if (ret) {
> +               dev_err(&pdev->dev, "Cannot enable thermal zone device\n");
> +               goto err_zone;
> +       }
>
>         dev_dbg(&pdev->dev,
>                 "TJUNC temperature polling period set at %d ms\n",
> diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
> index 2d26ae80e202..ee05950afd2f 100644
> --- a/drivers/thermal/hisi_thermal.c
> +++ b/drivers/thermal/hisi_thermal.c
> @@ -549,8 +549,10 @@ static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
>  {
>         struct thermal_zone_device *tzd = sensor->tzd;
>
> -       tzd->ops->set_mode(tzd,
> -               on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
> +       if (on)
> +               thermal_zone_device_enable(tzd);
> +       else
> +               thermal_zone_device_disable(tzd);
>  }
>
>  static int hisi_thermal_probe(struct platform_device *pdev)
> diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
> index 2c7ee5da608a..53abb1be1cba 100644
> --- a/drivers/thermal/imx_thermal.c
> +++ b/drivers/thermal/imx_thermal.c
> @@ -255,7 +255,7 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>         bool wait;
>         u32 val;
>
> -       if (tz->mode == THERMAL_DEVICE_ENABLED) {
> +       if (thermal_zone_device_is_enabled(tz)) {
>                 /* Check if a measurement is currently in progress */
>                 regmap_read(map, soc_data->temp_data, &val);
>                 wait = !(val & soc_data->temp_valid_mask);
> @@ -282,7 +282,7 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>
>         regmap_read(map, soc_data->temp_data, &val);
>
> -       if (tz->mode != THERMAL_DEVICE_ENABLED) {
> +       if (!thermal_zone_device_is_enabled(tz)) {
>                 regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
>                              soc_data->measure_temp_mask);
>                 regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> @@ -365,9 +365,6 @@ static int imx_set_mode(struct thermal_zone_device *tz,
>                 }
>         }
>
> -       tz->mode = mode;
> -       thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
> -
>         return 0;
>  }
>
> @@ -819,7 +816,9 @@ static int imx_thermal_probe(struct platform_device *pdev)
>                      data->socdata->measure_temp_mask);
>
>         data->irq_enabled = true;
> -       data->tz->mode = THERMAL_DEVICE_ENABLED;
> +       ret = thermal_zone_device_enable(data->tz);
> +       if (ret)
> +               goto thermal_zone_unregister;
>
>         ret = devm_request_threaded_irq(&pdev->dev, data->irq,
>                         imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
> @@ -861,19 +860,18 @@ static int imx_thermal_remove(struct platform_device *pdev)
>  static int __maybe_unused imx_thermal_suspend(struct device *dev)
>  {
>         struct imx_thermal_data *data = dev_get_drvdata(dev);
> -       struct regmap *map = data->tempmon;
> +       int ret;
>
>         /*
>          * Need to disable thermal sensor, otherwise, when thermal core
>          * try to get temperature before thermal sensor resume, a wrong
>          * temperature will be read as the thermal sensor is powered
> -        * down.
> +        * down. This is done in set_mode() operation called from
> +        * thermal_zone_device_disable()
>          */
> -       regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> -                    data->socdata->measure_temp_mask);
> -       regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> -                    data->socdata->power_down_mask);
> -       data->tz->mode = THERMAL_DEVICE_DISABLED;
> +       ret = thermal_zone_device_disable(data->tz);
> +       if (ret)
> +               return ret;
>         clk_disable_unprepare(data->thermal_clk);
>
>         return 0;
> @@ -882,18 +880,15 @@ static int __maybe_unused imx_thermal_suspend(struct device *dev)
>  static int __maybe_unused imx_thermal_resume(struct device *dev)
>  {
>         struct imx_thermal_data *data = dev_get_drvdata(dev);
> -       struct regmap *map = data->tempmon;
>         int ret;
>
>         ret = clk_prepare_enable(data->thermal_clk);
>         if (ret)
>                 return ret;
>         /* Enabled thermal sensor after resume */
> -       regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> -                    data->socdata->power_down_mask);
> -       regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> -                    data->socdata->measure_temp_mask);
> -       data->tz->mode = THERMAL_DEVICE_ENABLED;
> +       ret = thermal_zone_device_enable(data->tz);
> +       if (ret)
> +               return ret;
>
>         return 0;
>  }
> diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> index 9a622aaf29dd..3c0397a29b8c 100644
> --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> @@ -390,12 +390,11 @@ static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
>             mode != THERMAL_DEVICE_DISABLED)
>                 return -EINVAL;
>
> -       if (mode != thermal->mode) {
> -               thermal->mode = mode;
> +       if (mode != thermal->mode)
>                 result = int3400_thermal_run_osc(priv->adev->handle,
>                                                 priv->current_uuid_index,
>                                                 mode == THERMAL_DEVICE_ENABLED);
> -       }
> +
>
>         evaluate_odvp(priv);
>
> diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
> index c4879b4bfbf1..e29c3e330b17 100644
> --- a/drivers/thermal/intel/intel_quark_dts_thermal.c
> +++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
> @@ -126,10 +126,8 @@ static int soc_dts_enable(struct thermal_zone_device *tzd)
>         if (ret)
>                 return ret;
>
> -       if (out & QRK_DTS_ENABLE_BIT) {
> -               tzd->mode = THERMAL_DEVICE_ENABLED;
> +       if (out & QRK_DTS_ENABLE_BIT)
>                 return 0;
> -       }
>
>         if (!aux_entry->locked) {
>                 out |= QRK_DTS_ENABLE_BIT;
> @@ -137,10 +135,7 @@ static int soc_dts_enable(struct thermal_zone_device *tzd)
>                                      QRK_DTS_REG_OFFSET_ENABLE, out);
>                 if (ret)
>                         return ret;
> -
> -               tzd->mode = THERMAL_DEVICE_ENABLED;
>         } else {
> -               tzd->mode = THERMAL_DEVICE_DISABLED;
>                 pr_info("DTS is locked. Cannot enable DTS\n");
>                 ret = -EPERM;
>         }
> @@ -159,10 +154,8 @@ static int soc_dts_disable(struct thermal_zone_device *tzd)
>         if (ret)
>                 return ret;
>
> -       if (!(out & QRK_DTS_ENABLE_BIT)) {
> -               tzd->mode = THERMAL_DEVICE_DISABLED;
> +       if (!(out & QRK_DTS_ENABLE_BIT))
>                 return 0;
> -       }
>
>         if (!aux_entry->locked) {
>                 out &= ~QRK_DTS_ENABLE_BIT;
> @@ -171,10 +164,7 @@ static int soc_dts_disable(struct thermal_zone_device *tzd)
>
>                 if (ret)
>                         return ret;
> -
> -               tzd->mode = THERMAL_DEVICE_DISABLED;
>         } else {
> -               tzd->mode = THERMAL_DEVICE_ENABLED;
>                 pr_info("DTS is locked. Cannot disable DTS\n");
>                 ret = -EPERM;
>         }
> @@ -404,9 +394,7 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
>                 goto err_ret;
>         }
>
> -       mutex_lock(&dts_update_mutex);
> -       err = soc_dts_enable(aux_entry->tzone);
> -       mutex_unlock(&dts_update_mutex);
> +       err = thermal_zone_device_enable(aux_entry->tzone);
>         if (err)
>                 goto err_aux_status;
>
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index 15a71ecc916c..aa9e0e31ef98 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -1068,8 +1068,10 @@ rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
>  {
>         struct thermal_zone_device *tzd = sensor->tzd;
>
> -       tzd->ops->set_mode(tzd,
> -               on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
> +       if (on)
> +               thermal_zone_device_enable(tzd);
> +       else
> +               thermal_zone_device_disable(tzd);
>  }
>
>  static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
> diff --git a/drivers/thermal/sprd_thermal.c b/drivers/thermal/sprd_thermal.c
> index a340374e8c51..58f995b0f804 100644
> --- a/drivers/thermal/sprd_thermal.c
> +++ b/drivers/thermal/sprd_thermal.c
> @@ -322,8 +322,10 @@ static void sprd_thm_toggle_sensor(struct sprd_thermal_sensor *sen, bool on)
>  {
>         struct thermal_zone_device *tzd = sen->tzd;
>
> -       tzd->ops->set_mode(tzd,
> -               on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
> +       if (on)
> +               thermal_zone_device_enable(tzd);
> +       else
> +               thermal_zone_device_disable(tzd);
>  }
>
>  static int sprd_thm_probe(struct platform_device *pdev)
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index f02c57c986f0..52d136780577 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -1521,7 +1521,7 @@ static int thermal_pm_notify(struct notifier_block *nb,
>         case PM_POST_SUSPEND:
>                 atomic_set(&in_suspend, 0);
>                 list_for_each_entry(tz, &thermal_tz_list, node) {
> -                       if (tz->mode == THERMAL_DEVICE_DISABLED)
> +                       if (!thermal_zone_device_is_enabled(tz))
>                                 continue;
>
>                         thermal_zone_device_init(tz);
> diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
> index ba65d48a48cb..43a516a35d64 100644
> --- a/drivers/thermal/thermal_of.c
> +++ b/drivers/thermal/thermal_of.c
> @@ -272,8 +272,6 @@ static int of_thermal_set_mode(struct thermal_zone_device *tz,
>  {
>         struct __thermal_zone *data = tz->devdata;
>
> -       mutex_lock(&tz->lock);
> -
>         if (mode == THERMAL_DEVICE_ENABLED) {
>                 tz->polling_delay = data->polling_delay;
>                 tz->passive_delay = data->passive_delay;
> @@ -282,11 +280,6 @@ static int of_thermal_set_mode(struct thermal_zone_device *tz,
>                 tz->passive_delay = 0;
>         }
>
> -       mutex_unlock(&tz->lock);
> -
> -       tz->mode = mode;
> -       thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
> -
>         return 0;
>  }
>
> @@ -541,7 +534,7 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data,
>                         tzd = thermal_zone_of_add_sensor(child, sensor_np,
>                                                          data, ops);
>                         if (!IS_ERR(tzd))
> -                               tzd->ops->set_mode(tzd, THERMAL_DEVICE_ENABLED);
> +                               thermal_zone_device_enable(tzd);
>
>                         of_node_put(child);
>                         goto exit;
> @@ -1120,7 +1113,6 @@ int __init of_parse_thermal_zones(void)
>                         of_thermal_free_zone(tz);
>                         /* attempting to build remaining zones still */
>                 }
> -               zone->mode = THERMAL_DEVICE_DISABLED;
>         }
>         of_node_put(np);
>
> diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
> index 096370977068..c23d67c4dc4e 100644
> --- a/drivers/thermal/thermal_sysfs.c
> +++ b/drivers/thermal/thermal_sysfs.c
> @@ -49,9 +49,9 @@ static ssize_t
>  mode_show(struct device *dev, struct device_attribute *attr, char *buf)
>  {
>         struct thermal_zone_device *tz = to_thermal_zone(dev);
> +       int enabled = thermal_zone_device_is_enabled(tz);
>
> -       return sprintf(buf, "%s\n", tz->mode == THERMAL_DEVICE_ENABLED ?
> -                      "enabled" : "disabled");
> +       return sprintf(buf, "%s\n", enabled ? "enabled" : "disabled");
>  }
>
>  static ssize_t
> @@ -61,13 +61,10 @@ mode_store(struct device *dev, struct device_attribute *attr,
>         struct thermal_zone_device *tz = to_thermal_zone(dev);
>         int result;
>
> -       if (!tz->ops->set_mode)
> -               return -EPERM;
> -
>         if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
> -               result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED);
> +               result = thermal_zone_device_enable(tz);
>         else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
> -               result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED);
> +               result = thermal_zone_device_disable(tz);
>         else
>                 result = -EINVAL;
>
> --
> 2.17.1
>