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Message-ID: <d7efa7dd-6a07-beff-e3d1-8797dd203105@samsung.com>
Date: Sun, 19 Apr 2020 15:10:03 +0200
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
Cc: linux-pm@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
"Rafael J . Wysocki" <rjw@...ysocki.net>,
Len Brown <lenb@...nel.org>, Jiri Pirko <jiri@...lanox.com>,
Ido Schimmel <idosch@...lanox.com>,
"David S . Miller" <davem@...emloft.net>,
Peter Kaestle <peter@...e.net>,
Darren Hart <dvhart@...radead.org>,
Andy Shevchenko <andy@...radead.org>,
Support Opensource <support.opensource@...semi.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Amit Kucheria <amit.kucheria@...durent.com>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
NXP Linux Team <linux-imx@....com>,
Allison Randal <allison@...utok.net>,
Enrico Weigelt <info@...ux.net>,
Gayatri Kammela <gayatri.kammela@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
linux-acpi@...r.kernel.org, netdev@...r.kernel.org,
platform-driver-x86@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [RFC v3 1/2] thermal: core: Let thermal zone device's mode be
stored in its struct
On 4/19/20 1:38 PM, Bartlomiej Zolnierkiewicz wrote:
>
> Hi Andrzej,
>
> On 4/17/20 6:20 PM, Andrzej Pietrasiewicz wrote:
>> Thermal zone devices' mode is stored in individual drivers. This patch
>> changes it so that mode is stored in struct thermal_zone_device instead.
>>
>> As a result all driver-specific variables storing the mode are not needed
>> and are removed. Consequently, the get_mode() implementations have nothing
>> to operate on and need to be removed, too.
>>
>> Some thermal framework specific functions are introduced:
>>
>> thermal_zone_device_get_mode()
>> thermal_zone_device_set_mode()
>> thermal_zone_device_enable()
>> thermal_zone_device_disable()
>>
>> thermal_zone_device_get_mode() and its "set" counterpart take tzd's lock
>> and the "set" calls driver's set_mode() if provided, so the latter must
>> not take this lock again. At the end of the "set"
>> thermal_zone_device_update() is called so drivers don't need to repeat this
>> invocation in their specific set_mode() implementations.
>>
>> The scope of the above 4 functions is purposedly limited to the thermal
>> framework and drivers are not supposed to call them. This encapsulation
>
> This should be true only for thermal_zone_device_{get,set}_mode().
>
> thermal_zone_device_{en,dis}able() should be available for device drivers:
>
> * of/thermal device drivers need to enable thermal device itself
> (please refer to my patchset for details)
>
> * device drivers need to call them on ->suspend and ->resume operations
>
>> does not fully work at the moment for some drivers, though:
>>
>> - platform/x86/acerhdf.c
>> - drivers/thermal/imx_thermal.c
>> - drivers/thermal/intel/intel_quark_dts_thermal.c
>> - drivers/thermal/of-thermal.c
>>
>> and they manipulate struct thermal_zone_device's members directly.
>>
>> struct thermal_zone_params gains a new member called initial_mode, which
>> is used to set tzd's mode at registration time.
>>
>> The sysfs "mode" attribute is always exposed from now on, because all
>> thermal zone devices now have their get_mode() implemented at the generic
>> level and it is always available. Exposing "mode" doesn't hurt the drivers
>> which don't provide their own set_mode(), because writing to "mode" will
>> result in -EPERM, as expected.
>>
>> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
>> ---
>> drivers/acpi/thermal.c | 46 +++++----------
>> .../ethernet/mellanox/mlxsw/core_thermal.c | 57 ++++---------------
>> drivers/platform/x86/acerhdf.c | 17 +-----
>> drivers/thermal/da9062-thermal.c | 16 ++----
>> drivers/thermal/imx_thermal.c | 29 +++-------
>> .../intel/int340x_thermal/int3400_thermal.c | 30 ++--------
>> .../thermal/intel/intel_quark_dts_thermal.c | 22 ++-----
>> drivers/thermal/of-thermal.c | 30 +++-------
>> drivers/thermal/thermal_core.c | 44 +++++++++++++-
>> drivers/thermal/thermal_core.h | 16 ++++++
>> drivers/thermal/thermal_sysfs.c | 29 +---------
>> include/linux/thermal.h | 7 ++-
>> 12 files changed, 125 insertions(+), 218 deletions(-)
>>
>> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
>> index 19067a5e5293..67bc263332a5 100644
>> --- a/drivers/acpi/thermal.c
>> +++ b/drivers/acpi/thermal.c
>> @@ -172,7 +172,6 @@ struct acpi_thermal {
>> struct acpi_thermal_trips trips;
>> struct acpi_handle_list devices;
>> struct thermal_zone_device *thermal_zone;
>> - int tz_enabled;
>> int kelvin_offset; /* in millidegrees */
>> struct work_struct thermal_check_work;
>> };
>> @@ -500,7 +499,7 @@ static void acpi_thermal_check(void *data)
>> {
>> struct acpi_thermal *tz = data;
>>
>> - if (!tz->tz_enabled)
>> + if (tz->thermal_zone->mode != THERMAL_DEVICE_ENABLED)
>> return;
>>
>> thermal_zone_device_update(tz->thermal_zone,
>> @@ -526,46 +525,29 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp)
>> return 0;
>> }
>>
>> -static int thermal_get_mode(struct thermal_zone_device *thermal,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct acpi_thermal *tz = thermal->devdata;
>> -
>> - if (!tz)
>> - return -EINVAL;
>> -
>> - *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
>> - THERMAL_DEVICE_DISABLED;
>> -
>> - return 0;
>> -}
>> -
>> static int thermal_set_mode(struct thermal_zone_device *thermal,
>> enum thermal_device_mode mode)
>> {
>> struct acpi_thermal *tz = thermal->devdata;
>> - int enable;
>>
>> if (!tz)
>> return -EINVAL;
>>
>> + if (mode != THERMAL_DEVICE_DISABLED &&
>> + mode != THERMAL_DEVICE_ENABLED)
>> + return -EINVAL;
>
> These checks should be removed as they are already done in the caller
> of ->set_mode method (thermal_zone_device_set_mode()).
>
>> +
>> /*
>> * enable/disable thermal management from ACPI thermal driver
>> */
>> - if (mode == THERMAL_DEVICE_ENABLED)
>> - enable = 1;
>> - else if (mode == THERMAL_DEVICE_DISABLED) {
>> - enable = 0;
>> + if (mode == THERMAL_DEVICE_DISABLED)
>> pr_warn("thermal zone will be disabled\n");
>> - } else
>> - return -EINVAL;
>>
>> - if (enable != tz->tz_enabled) {
>> - tz->tz_enabled = enable;
>> + if (mode != thermal->mode) {
>> ACPI_DEBUG_PRINT((ACPI_DB_INFO,
>> "%s kernel ACPI thermal control\n",
>> - tz->tz_enabled ? "Enable" : "Disable"));
>> - acpi_thermal_check(tz);
>> + mode == THERMAL_DEVICE_ENABLED ?
>> + "Enable" : "Disable"));
>> }
>> return 0;
>> }
>> @@ -856,7 +838,6 @@ static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
>> .bind = acpi_thermal_bind_cooling_device,
>> .unbind = acpi_thermal_unbind_cooling_device,
>> .get_temp = thermal_get_temp,
>> - .get_mode = thermal_get_mode,
>> .set_mode = thermal_set_mode,
>> .get_trip_type = thermal_get_trip_type,
>> .get_trip_temp = thermal_get_trip_temp,
>> @@ -870,6 +851,9 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>> int trips = 0;
>> int result;
>> acpi_status status;
>> + struct thermal_zone_params prms = {
>> + .initial_mode = THERMAL_DEVICE_ENABLED,
>> + };
>> int i;
>>
>> if (tz->trips.critical.flags.valid)
>> @@ -887,13 +871,13 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>> if (tz->trips.passive.flags.valid)
>> tz->thermal_zone =
>> thermal_zone_device_register("acpitz", trips, 0, tz,
>> - &acpi_thermal_zone_ops, NULL,
>> + &acpi_thermal_zone_ops, &prms,
>> tz->trips.passive.tsp*100,
>> tz->polling_frequency*100);
>> else
>> tz->thermal_zone =
>> thermal_zone_device_register("acpitz", trips, 0, tz,
>> - &acpi_thermal_zone_ops, NULL,
>> + &acpi_thermal_zone_ops, &prms,
>> 0, tz->polling_frequency*100);
>> if (IS_ERR(tz->thermal_zone))
>> return -ENODEV;
>> @@ -913,8 +897,6 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>> if (ACPI_FAILURE(status))
>> return -ENODEV;
>>
>> - tz->tz_enabled = 1;
>> -
>> dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
>> tz->thermal_zone->id);
>> return 0;
>> diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
>> index ce0a6837daa3..50518048b86d 100644
>> --- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
>> +++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
>> @@ -98,7 +98,6 @@ struct mlxsw_thermal_module {
>> struct mlxsw_thermal *parent;
>> struct thermal_zone_device *tzdev;
>> struct mlxsw_thermal_trip trips[MLXSW_THERMAL_NUM_TRIPS];
>> - enum thermal_device_mode mode;
>> int module; /* Module or gearbox number */
>> };
>>
>> @@ -110,7 +109,6 @@ struct mlxsw_thermal {
>> struct thermal_cooling_device *cdevs[MLXSW_MFCR_PWMS_MAX];
>> u8 cooling_levels[MLXSW_THERMAL_MAX_STATE + 1];
>> struct mlxsw_thermal_trip trips[MLXSW_THERMAL_NUM_TRIPS];
>> - enum thermal_device_mode mode;
>> struct mlxsw_thermal_module *tz_module_arr;
>> u8 tz_module_num;
>> struct mlxsw_thermal_module *tz_gearbox_arr;
>> @@ -277,33 +275,16 @@ static int mlxsw_thermal_unbind(struct thermal_zone_device *tzdev,
>> return 0;
>> }
>>
>> -static int mlxsw_thermal_get_mode(struct thermal_zone_device *tzdev,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct mlxsw_thermal *thermal = tzdev->devdata;
>> -
>> - *mode = thermal->mode;
>> -
>> - return 0;
>> -}
>> -
>> static int mlxsw_thermal_set_mode(struct thermal_zone_device *tzdev,
>> enum thermal_device_mode mode)
>> {
>> 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;
>>
>> - mutex_unlock(&tzdev->lock);
>> -
>> - thermal->mode = mode;
>> - thermal_zone_device_update(tzdev, THERMAL_EVENT_UNSPECIFIED);
>> -
>> return 0;
>> }
>>
>> @@ -407,7 +388,6 @@ static int mlxsw_thermal_trend_get(struct thermal_zone_device *tzdev,
>> static struct thermal_zone_device_ops mlxsw_thermal_ops = {
>> .bind = mlxsw_thermal_bind,
>> .unbind = mlxsw_thermal_unbind,
>> - .get_mode = mlxsw_thermal_get_mode,
>> .set_mode = mlxsw_thermal_set_mode,
>> .get_temp = mlxsw_thermal_get_temp,
>> .get_trip_type = mlxsw_thermal_get_trip_type,
>> @@ -466,34 +446,17 @@ static int mlxsw_thermal_module_unbind(struct thermal_zone_device *tzdev,
>> return err;
>> }
>>
>> -static int mlxsw_thermal_module_mode_get(struct thermal_zone_device *tzdev,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct mlxsw_thermal_module *tz = tzdev->devdata;
>> -
>> - *mode = tz->mode;
>> -
>> - return 0;
>> -}
>> -
>> static int mlxsw_thermal_module_mode_set(struct thermal_zone_device *tzdev,
>> enum thermal_device_mode mode)
>> {
>> 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;
>>
>> - mutex_unlock(&tzdev->lock);
>> -
>> - tz->mode = mode;
>> - thermal_zone_device_update(tzdev, THERMAL_EVENT_UNSPECIFIED);
>> -
>> return 0;
>> }
>>
>> @@ -596,7 +559,6 @@ mlxsw_thermal_module_trip_hyst_set(struct thermal_zone_device *tzdev, int trip,
>> static struct thermal_zone_device_ops mlxsw_thermal_module_ops = {
>> .bind = mlxsw_thermal_module_bind,
>> .unbind = mlxsw_thermal_module_unbind,
>> - .get_mode = mlxsw_thermal_module_mode_get,
>> .set_mode = mlxsw_thermal_module_mode_set,
>> .get_temp = mlxsw_thermal_module_temp_get,
>> .get_trip_type = mlxsw_thermal_module_trip_type_get,
>> @@ -635,7 +597,6 @@ static int mlxsw_thermal_gearbox_temp_get(struct thermal_zone_device *tzdev,
>> static struct thermal_zone_device_ops mlxsw_thermal_gearbox_ops = {
>> .bind = mlxsw_thermal_module_bind,
>> .unbind = mlxsw_thermal_module_unbind,
>> - .get_mode = mlxsw_thermal_module_mode_get,
>> .set_mode = mlxsw_thermal_module_mode_set,
>> .get_temp = mlxsw_thermal_gearbox_temp_get,
>> .get_trip_type = mlxsw_thermal_module_trip_type_get,
>> @@ -749,6 +710,9 @@ static const struct thermal_cooling_device_ops mlxsw_cooling_ops = {
>> static int
>> mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
>> {
>> + struct thermal_zone_params tzp = {
>> + .initial_mode = THERMAL_DEVICE_ENABLED,
>> + };
>> char tz_name[MLXSW_THERMAL_ZONE_MAX_NAME];
>> int err;
>>
>> @@ -759,13 +723,12 @@ mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
>> MLXSW_THERMAL_TRIP_MASK,
>> module_tz,
>> &mlxsw_thermal_module_ops,
>> - NULL, 0, 0);
>> + &tzp, 0, 0);
>> if (IS_ERR(module_tz->tzdev)) {
>> err = PTR_ERR(module_tz->tzdev);
>> return err;
>> }
>>
>> - module_tz->mode = THERMAL_DEVICE_ENABLED;
>> return 0;
>> }
>>
>> @@ -868,6 +831,9 @@ mlxsw_thermal_modules_fini(struct mlxsw_thermal *thermal)
>> static int
>> mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
>> {
>> + struct thermal_zone_params tzp = {
>> + .initial_mode = THERMAL_DEVICE_ENABLED,
>> + };
>> char tz_name[MLXSW_THERMAL_ZONE_MAX_NAME];
>>
>> snprintf(tz_name, sizeof(tz_name), "mlxsw-gearbox%d",
>> @@ -877,11 +843,10 @@ mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
>> MLXSW_THERMAL_TRIP_MASK,
>> gearbox_tz,
>> &mlxsw_thermal_gearbox_ops,
>> - NULL, 0, 0);
>> + &tzp, 0, 0);
>> if (IS_ERR(gearbox_tz->tzdev))
>> return PTR_ERR(gearbox_tz->tzdev);
>>
>> - gearbox_tz->mode = THERMAL_DEVICE_ENABLED;
>> return 0;
>> }
>>
>> @@ -960,6 +925,9 @@ int mlxsw_thermal_init(struct mlxsw_core *core,
>> const struct mlxsw_bus_info *bus_info,
>> struct mlxsw_thermal **p_thermal)
>> {
>> + struct thermal_zone_params tzp = {
>> + .initial_mode = THERMAL_DEVICE_ENABLED,
>> + };
>> char mfcr_pl[MLXSW_REG_MFCR_LEN] = { 0 };
>> enum mlxsw_reg_mfcr_pwm_frequency freq;
>> struct device *dev = bus_info->dev;
>> @@ -1034,7 +1002,7 @@ int mlxsw_thermal_init(struct mlxsw_core *core,
>> MLXSW_THERMAL_TRIP_MASK,
>> thermal,
>> &mlxsw_thermal_ops,
>> - NULL, 0,
>> + &tzp, 0,
>> thermal->polling_delay);
>> if (IS_ERR(thermal->tzdev)) {
>> err = PTR_ERR(thermal->tzdev);
>> @@ -1050,7 +1018,6 @@ int mlxsw_thermal_init(struct mlxsw_core *core,
>> if (err)
>> goto err_unreg_modules_tzdev;
>>
>> - thermal->mode = THERMAL_DEVICE_ENABLED;
>> *p_thermal = thermal;
>> return 0;
>>
>> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
>> index 8cc86f4e3ac1..aaf8b845be90 100644
>> --- a/drivers/platform/x86/acerhdf.c
>> +++ b/drivers/platform/x86/acerhdf.c
>> @@ -406,22 +406,9 @@ static inline void acerhdf_enable_kernelmode(void)
>> kernelmode = 1;
>>
>> thz_dev->polling_delay = interval*1000;
>> - thermal_zone_device_update(thz_dev, THERMAL_EVENT_UNSPECIFIED);
>> pr_notice("kernel mode fan control ON\n");
>> }
>>
>> -static int acerhdf_get_mode(struct thermal_zone_device *thermal,
>> - enum thermal_device_mode *mode)
>> -{
>> - if (verbose)
>> - pr_notice("kernel mode fan control %d\n", kernelmode);
>> -
>> - *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
>> - : THERMAL_DEVICE_DISABLED;
>> -
>> - return 0;
>> -}
>> -
>> /*
>> * set operation mode;
>> * enabled: the thermal layer of the kernel takes care about
>> @@ -488,7 +475,6 @@ static struct thermal_zone_device_ops acerhdf_dev_ops = {
>> .bind = acerhdf_bind,
>> .unbind = acerhdf_unbind,
>> .get_temp = acerhdf_get_ec_temp,
>> - .get_mode = acerhdf_get_mode,
>> .set_mode = acerhdf_set_mode,
>> .get_trip_type = acerhdf_get_trip_type,
>> .get_trip_hyst = acerhdf_get_trip_hyst,
>> @@ -554,6 +540,7 @@ static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
>>
>> err_out:
>> acerhdf_revert_to_bios_mode();
>> + thz_dev->mode = THERMAL_DEVICE_DISABLED;
>> return -EINVAL;
>> }
>>
>> @@ -739,6 +726,8 @@ static int __init acerhdf_register_thermal(void)
>> if (IS_ERR(cl_dev))
>> return -EINVAL;
>>
>> + acerhdf_zone_params.initial_mode =
>> + kernelmode ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED;
>> thz_dev = thermal_zone_device_register("acerhdf", 2, 0, NULL,
>> &acerhdf_dev_ops,
>> &acerhdf_zone_params, 0,
>> diff --git a/drivers/thermal/da9062-thermal.c b/drivers/thermal/da9062-thermal.c
>> index c32709badeda..4bdb6f9621c1 100644
>> --- a/drivers/thermal/da9062-thermal.c
>> +++ b/drivers/thermal/da9062-thermal.c
>> @@ -49,7 +49,6 @@ struct da9062_thermal {
>> struct da9062 *hw;
>> struct delayed_work work;
>> struct thermal_zone_device *zone;
>> - enum thermal_device_mode mode;
>> struct mutex lock; /* protection for da9062_thermal temperature */
>> int temperature;
>> int irq;
>> @@ -121,14 +120,6 @@ static irqreturn_t da9062_thermal_irq_handler(int irq, void *data)
>> return IRQ_HANDLED;
>> }
>>
>> -static int da9062_thermal_get_mode(struct thermal_zone_device *z,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct da9062_thermal *thermal = z->devdata;
>> - *mode = thermal->mode;
>> - return 0;
>> -}
>> -
>> static int da9062_thermal_get_trip_type(struct thermal_zone_device *z,
>> int trip,
>> enum thermal_trip_type *type)
>> @@ -181,7 +172,6 @@ static int da9062_thermal_get_temp(struct thermal_zone_device *z,
>>
>> static struct thermal_zone_device_ops da9062_thermal_ops = {
>> .get_temp = da9062_thermal_get_temp,
>> - .get_mode = da9062_thermal_get_mode,
>> .get_trip_type = da9062_thermal_get_trip_type,
>> .get_trip_temp = da9062_thermal_get_trip_temp,
>> };
>> @@ -199,6 +189,9 @@ MODULE_DEVICE_TABLE(of, da9062_compatible_reg_id_table);
>>
>> static int da9062_thermal_probe(struct platform_device *pdev)
>> {
>> + struct thermal_zone_params tzp = {
>> + .initial_mode = THERMAL_DEVICE_ENABLED,
>> + };
>> struct da9062 *chip = dev_get_drvdata(pdev->dev.parent);
>> struct da9062_thermal *thermal;
>> unsigned int pp_tmp = DA9062_DEFAULT_POLLING_MS_PERIOD;
>> @@ -233,7 +226,6 @@ static int da9062_thermal_probe(struct platform_device *pdev)
>>
>> thermal->config = match->data;
>> thermal->hw = chip;
>> - thermal->mode = THERMAL_DEVICE_ENABLED;
>> thermal->dev = &pdev->dev;
>>
>> INIT_DELAYED_WORK(&thermal->work, da9062_thermal_poll_on);
>> @@ -241,7 +233,7 @@ static int da9062_thermal_probe(struct platform_device *pdev)
>>
>> thermal->zone = thermal_zone_device_register(thermal->config->name,
>> 1, 0, thermal,
>> - &da9062_thermal_ops, NULL, pp_tmp,
>> + &da9062_thermal_ops, &tzp, pp_tmp,
>> 0);
>> if (IS_ERR(thermal->zone)) {
>> dev_err(&pdev->dev, "Cannot register thermal zone device\n");
>> diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
>> index e761c9b42217..3e02323c938b 100644
>> --- a/drivers/thermal/imx_thermal.c
>> +++ b/drivers/thermal/imx_thermal.c
>> @@ -197,7 +197,6 @@ struct imx_thermal_data {
>> struct cpufreq_policy *policy;
>> struct thermal_zone_device *tz;
>> struct thermal_cooling_device *cdev;
>> - enum thermal_device_mode mode;
>> struct regmap *tempmon;
>> u32 c1, c2; /* See formula in imx_init_calib() */
>> int temp_passive;
>> @@ -256,7 +255,7 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>> bool wait;
>> u32 val;
>>
>> - if (data->mode == THERMAL_DEVICE_ENABLED) {
>> + if (tz->mode == THERMAL_DEVICE_ENABLED) {
>> /* Check if a measurement is currently in progress */
>> regmap_read(map, soc_data->temp_data, &val);
>> wait = !(val & soc_data->temp_valid_mask);
>> @@ -283,7 +282,7 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>>
>> regmap_read(map, soc_data->temp_data, &val);
>>
>> - if (data->mode != THERMAL_DEVICE_ENABLED) {
>> + if (tz->mode != THERMAL_DEVICE_ENABLED) {
>> regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
>> soc_data->measure_temp_mask);
>> regmap_write(map, soc_data->sensor_ctrl + REG_SET,
>> @@ -331,16 +330,6 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>> return 0;
>> }
>>
>> -static int imx_get_mode(struct thermal_zone_device *tz,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct imx_thermal_data *data = tz->devdata;
>> -
>> - *mode = data->mode;
>> -
>> - return 0;
>> -}
>> -
>> static int imx_set_mode(struct thermal_zone_device *tz,
>> enum thermal_device_mode mode)
>> {
>> @@ -376,9 +365,6 @@ static int imx_set_mode(struct thermal_zone_device *tz,
>> }
>> }
>>
>> - data->mode = mode;
>> - thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
>> -
>> return 0;
>> }
>>
>> @@ -467,7 +453,6 @@ static struct thermal_zone_device_ops imx_tz_ops = {
>> .bind = imx_bind,
>> .unbind = imx_unbind,
>> .get_temp = imx_get_temp,
>> - .get_mode = imx_get_mode,
>> .set_mode = imx_set_mode,
>> .get_trip_type = imx_get_trip_type,
>> .get_trip_temp = imx_get_trip_temp,
>> @@ -691,6 +676,9 @@ static inline void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data
>>
>> static int imx_thermal_probe(struct platform_device *pdev)
>> {
>> + struct thermal_zone_params tzp = {
>> + .initial_mode = THERMAL_DEVICE_ENABLED,
>> + };
>> struct imx_thermal_data *data;
>> struct regmap *map;
>> int measure_freq;
>> @@ -799,7 +787,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
>> data->tz = thermal_zone_device_register("imx_thermal_zone",
>> IMX_TRIP_NUM,
>> BIT(IMX_TRIP_PASSIVE), data,
>> - &imx_tz_ops, NULL,
>> + &imx_tz_ops, &tzp,
>> IMX_PASSIVE_DELAY,
>> IMX_POLLING_DELAY);
>> if (IS_ERR(data->tz)) {
>> @@ -831,7 +819,6 @@ static int imx_thermal_probe(struct platform_device *pdev)
>> data->socdata->measure_temp_mask);
>>
>> data->irq_enabled = true;
>> - data->mode = THERMAL_DEVICE_ENABLED;
>>
>> ret = devm_request_threaded_irq(&pdev->dev, data->irq,
>> imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
>> @@ -885,7 +872,7 @@ static int __maybe_unused imx_thermal_suspend(struct device *dev)
>> data->socdata->measure_temp_mask);
>> regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
>> data->socdata->power_down_mask);
>> - data->mode = THERMAL_DEVICE_DISABLED;
>> + data->tz->mode = THERMAL_DEVICE_DISABLED;
>> clk_disable_unprepare(data->thermal_clk);
>>
>> return 0;
>> @@ -905,7 +892,7 @@ static int __maybe_unused imx_thermal_resume(struct device *dev)
>> data->socdata->power_down_mask);
>> regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
>> data->socdata->measure_temp_mask);
>> - data->mode = THERMAL_DEVICE_ENABLED;
>> + data->tz->mode = THERMAL_DEVICE_ENABLED;
>>
>> return 0;
>> }
>> diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
>> index e802922a13cf..86a00598ed09 100644
>> --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
>> +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
>> @@ -44,7 +44,6 @@ static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
>> struct int3400_thermal_priv {
>> struct acpi_device *adev;
>> struct thermal_zone_device *thermal;
>> - int mode;
>> int art_count;
>> struct art *arts;
>> int trt_count;
>> @@ -230,48 +229,29 @@ static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
>> return 0;
>> }
>>
>> -static int int3400_thermal_get_mode(struct thermal_zone_device *thermal,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct int3400_thermal_priv *priv = thermal->devdata;
>> -
>> - if (!priv)
>> - return -EINVAL;
>> -
>> - *mode = priv->mode;
>> -
>> - return 0;
>> -}
>> -
>> static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
>> enum thermal_device_mode mode)
>> {
>> struct int3400_thermal_priv *priv = thermal->devdata;
>> - bool enable;
>> int result = 0;
>>
>> if (!priv)
>> return -EINVAL;
>>
>> - if (mode == THERMAL_DEVICE_ENABLED)
>> - enable = true;
>> - else if (mode == THERMAL_DEVICE_DISABLED)
>> - enable = false;
>> - else
>> + if (mode != THERMAL_DEVICE_ENABLED &&
>> + mode != THERMAL_DEVICE_DISABLED)
>> return -EINVAL;
>
> These checks should be removed as they are already done in the caller
> of ->set_mode method (thermal_zone_device_set_mode()).
>
>> - if (enable != priv->mode) {
>> - priv->mode = enable;
>> + if (mode != thermal->mode) {
>> result = int3400_thermal_run_osc(priv->adev->handle,
>> - priv->current_uuid_index,
>> - enable);
>> + priv->current_uuid_index,
>> + mode == THERMAL_DEVICE_ENABLED);
>> }
>> return result;
>> }
>>
>> static struct thermal_zone_device_ops int3400_thermal_ops = {
>> .get_temp = int3400_thermal_get_temp,
>> - .get_mode = int3400_thermal_get_mode,
>> .set_mode = int3400_thermal_set_mode,
>> };
>>
>> diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
>> index d704fc104cfd..c4879b4bfbf1 100644
>> --- a/drivers/thermal/intel/intel_quark_dts_thermal.c
>> +++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
>> @@ -103,7 +103,6 @@ struct soc_sensor_entry {
>> bool locked;
>> u32 store_ptps;
>> u32 store_dts_enable;
>> - enum thermal_device_mode mode;
>> struct thermal_zone_device *tzone;
>> };
>>
>> @@ -128,7 +127,7 @@ static int soc_dts_enable(struct thermal_zone_device *tzd)
>> return ret;
>>
>> if (out & QRK_DTS_ENABLE_BIT) {
>> - aux_entry->mode = THERMAL_DEVICE_ENABLED;
>> + tzd->mode = THERMAL_DEVICE_ENABLED;
>> return 0;
>> }
>>
>> @@ -139,9 +138,9 @@ static int soc_dts_enable(struct thermal_zone_device *tzd)
>> if (ret)
>> return ret;
>>
>> - aux_entry->mode = THERMAL_DEVICE_ENABLED;
>> + tzd->mode = THERMAL_DEVICE_ENABLED;
>> } else {
>> - aux_entry->mode = THERMAL_DEVICE_DISABLED;
>> + tzd->mode = THERMAL_DEVICE_DISABLED;
>> pr_info("DTS is locked. Cannot enable DTS\n");
>> ret = -EPERM;
>> }
>> @@ -161,7 +160,7 @@ static int soc_dts_disable(struct thermal_zone_device *tzd)
>> return ret;
>>
>> if (!(out & QRK_DTS_ENABLE_BIT)) {
>> - aux_entry->mode = THERMAL_DEVICE_DISABLED;
>> + tzd->mode = THERMAL_DEVICE_DISABLED;
>> return 0;
>> }
>>
>> @@ -173,9 +172,9 @@ static int soc_dts_disable(struct thermal_zone_device *tzd)
>> if (ret)
>> return ret;
>>
>> - aux_entry->mode = THERMAL_DEVICE_DISABLED;
>> + tzd->mode = THERMAL_DEVICE_DISABLED;
>> } else {
>> - aux_entry->mode = THERMAL_DEVICE_ENABLED;
>> + tzd->mode = THERMAL_DEVICE_ENABLED;
>> pr_info("DTS is locked. Cannot disable DTS\n");
>> ret = -EPERM;
>> }
>> @@ -309,14 +308,6 @@ static int sys_get_curr_temp(struct thermal_zone_device *tzd,
>> return 0;
>> }
>>
>> -static int sys_get_mode(struct thermal_zone_device *tzd,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct soc_sensor_entry *aux_entry = tzd->devdata;
>> - *mode = aux_entry->mode;
>> - return 0;
>> -}
>> -
>> static int sys_set_mode(struct thermal_zone_device *tzd,
>> enum thermal_device_mode mode)
>> {
>> @@ -338,7 +329,6 @@ static struct thermal_zone_device_ops tzone_ops = {
>> .get_trip_type = sys_get_trip_type,
>> .set_trip_temp = sys_set_trip_temp,
>> .get_crit_temp = sys_get_crit_temp,
>> - .get_mode = sys_get_mode,
>> .set_mode = sys_set_mode,
>> };
>>
>> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
>> index 874a47d6923f..863b89546f81 100644
>> --- a/drivers/thermal/of-thermal.c
>> +++ b/drivers/thermal/of-thermal.c
>> @@ -51,7 +51,6 @@ struct __thermal_bind_params {
>>
>> /**
>> * struct __thermal_zone - internal representation of a thermal zone
>> - * @mode: current thermal zone device mode (enabled/disabled)
>> * @passive_delay: polling interval while passive cooling is activated
>> * @polling_delay: zone polling interval
>> * @slope: slope of the temperature adjustment curve
>> @@ -65,7 +64,6 @@ struct __thermal_bind_params {
>> */
>>
>> struct __thermal_zone {
>> - enum thermal_device_mode mode;
>> int passive_delay;
>> int polling_delay;
>> int slope;
>> @@ -269,23 +267,11 @@ static int of_thermal_unbind(struct thermal_zone_device *thermal,
>> return 0;
>> }
>>
>> -static int of_thermal_get_mode(struct thermal_zone_device *tz,
>> - enum thermal_device_mode *mode)
>> -{
>> - struct __thermal_zone *data = tz->devdata;
>> -
>> - *mode = data->mode;
>> -
>> - return 0;
>> -}
>> -
>> static int of_thermal_set_mode(struct thermal_zone_device *tz,
>> enum thermal_device_mode mode)
>> {
>> 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;
>> @@ -294,11 +280,6 @@ static int of_thermal_set_mode(struct thermal_zone_device *tz,
>> tz->passive_delay = 0;
>> }
>>
>> - mutex_unlock(&tz->lock);
>> -
>> - data->mode = mode;
>> - thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
>> -
>> return 0;
>> }
>>
>> @@ -393,7 +374,6 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
>> }
>>
>> static struct thermal_zone_device_ops of_thermal_ops = {
>> - .get_mode = of_thermal_get_mode,
>> .set_mode = of_thermal_set_mode,
>>
>> .get_trip_type = of_thermal_get_trip_type,
>> @@ -553,8 +533,14 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data,
>> if (id == sensor_id) {
>> tzd = thermal_zone_of_add_sensor(child, sensor_np,
>> data, ops);
>> - if (!IS_ERR(tzd))
>> + if (!IS_ERR(tzd)) {
>> + mutex_lock(&tzd->lock);
>> tzd->ops->set_mode(tzd, THERMAL_DEVICE_ENABLED);
>> + tzd->mode = THERMAL_DEVICE_ENABLED;
>> + mutex_unlock(&tzd->lock);
>> + thermal_zone_device_update(tzd,
>> + THERMAL_EVENT_UNSPECIFIED);
>> + }
>
> This should use thermal_zone_device_enable() instead of open-coding it:
>
> if (!IS_ERR(tzd))
> thermal_zone_device_enable(tzd);
>
> Also because of of_thermal_set_mode() modifications following of/thermal
> device drivers (which use ->set_mode directly):
>
> drivers/thermal/hisi_thermal.c: tzd->ops->set_mode(tzd,
> drivers/thermal/rockchip_thermal.c: tzd->ops->set_mode(tzd,
> drivers/thermal/sprd_thermal.c: tzd->ops->set_mode(tzd,
>
> need to be converted to use thermal_zone_device_{en,dis}able() instead.
>
>> of_node_put(child);
>> goto exit;
>> @@ -979,7 +965,6 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
>>
>> finish:
>> of_node_put(child);
>> - tz->mode = THERMAL_DEVICE_DISABLED;
>>
>> return tz;
>>
>> @@ -1120,6 +1105,7 @@ int __init of_parse_thermal_zones(void)
>> /* these two are left for temperature drivers to use */
>> tzp->slope = tz->slope;
>> tzp->offset = tz->offset;
>> + tzp->initial_mode = THERMAL_DEVICE_DISABLED;
>>
>> zone = thermal_zone_device_register(child->name, tz->ntrips,
>> mask, tz,
>> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
>> index c06550930979..5ff98fcc0f6a 100644
>> --- a/drivers/thermal/thermal_core.c
>> +++ b/drivers/thermal/thermal_core.c
>> @@ -463,6 +463,43 @@ static void thermal_zone_device_reset(struct thermal_zone_device *tz)
>> thermal_zone_device_init(tz);
>> }
>>
>> +enum thermal_device_mode
>> +thermal_zone_device_get_mode(struct thermal_zone_device *tz)
>> +{
>> + enum thermal_device_mode mode;
>> +
>> + mutex_lock(&tz->lock);
>> +
>> + mode = tz->mode;
>> +
>> + mutex_unlock(&tz->lock);
>> +
>> + return mode;
>> +}
>> +
>> +int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
>> + enum thermal_device_mode mode)
>> +{
>> + int ret = 0;
>> +
>> + if (mode != THERMAL_DEVICE_DISABLED &&
>> + mode != THERMAL_DEVICE_ENABLED)
>> + return -EINVAL;
>
> No need for these checks as enum thermal_device_mode has only two
> possible values (we don't do "defensive coding" in the kernel).
>
>> + mutex_lock(&tz->lock);
>> +
>> + if (tz->ops->set_mode)
>> + ret = tz->ops->set_mode(tz, mode);
>> +
>> + tz->mode = mode;
>> +
>> + mutex_unlock(&tz->lock);
>> +
>> + thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
>> +
>> + return ret;
>> +}
>
> Please add:
>
> EXPORT_SYMBOL_GPL(thermal_zone_device_set_mode);
>
> here so device drivers can use thermal_zone_device_{en,dis}able().
>
>> void thermal_zone_device_update(struct thermal_zone_device *tz,
>> enum thermal_notify_event event)
>> {
>> @@ -1344,6 +1381,9 @@ thermal_zone_device_register(const char *type, int trips, int mask,
>> if (atomic_cmpxchg(&tz->need_update, 1, 0))
>> thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
>>
>> + if (tzp)
>> + thermal_zone_device_set_mode(tz, tzp->initial_mode);
>
> Please note that currently some device drivers don't access ->mode
> at all so their default ->mode value is THERMAL_DEVICE_DISABLED but
> in reality they are enabled (IOW after changes in this patch they
> should default to THERMAL_DEVICE_ENABLED to reflect real device state
> in "mode" sysfs attribue and not break after applying patch #2).
>
> Therefore we should always call thermal_zone_device_set_mode() and
> use the default value of THERMAL_DEVICE_ENABLED if tzp is NULL:
>
> mode = tzp ? tzp->initial_mode : THERMAL_DEVICE_ENABLED;
> thermal_zone_device_set_mode(tz, mode);
>
> This would also simplify the patch further:
>
> * setting tz->need_update and calling thermal_zone_device_update()
> directly can be removed from thermal_zone_device_register()
>
> * tzp-s with only .initial_mode = THERMAL_DEVICE_ENABLED set can
> be removed from:
>
> drivers/thermal/acpi.c
> drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
> drivers/thermal/da9062-thermal.c
> drivers/thermal/imx_thermal.c
>
> The rest of the patch looks fine, thank you for working on this!
Oops, one more thing, I've audited all existing users of
thermal_zone_device_register() with non-NULL tzp argument:
* following drivers should be updated to set .initial_mode to
THERMAL_DEVICE_ENABLED in their tzp instance (no ->set_mode
method and ->mode not set currently during initialization):
drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
drivers/thermal/intel/x86_pkg_temp_thermal.c
* following driver may be updated to explicitly set .initial_mode
to THERMAL_DEVICE_DISABLED in its tzp instance (has ->set_mode
method but ->mode not set currently during initialization):
drivers/thermal/intel/int340x_thermal/int3400_thermal.c
(THERMAL_DEVICE_DISABLED == 0 is the default currently but
lets document the behavior and prepare driver for potentially
changing the default into more sane THERMAL_DEVICE_ENABLED in
the future)
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
>> +
>> return tz;
>>
>> unregister:
>> @@ -1473,9 +1513,7 @@ 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) {
>> - tz_mode = THERMAL_DEVICE_ENABLED;
>> - if (tz->ops->get_mode)
>> - tz->ops->get_mode(tz, &tz_mode);
>> + tz_mode = thermal_zone_device_get_mode(tz);
>>
>> if (tz_mode == THERMAL_DEVICE_DISABLED)
>> continue;
>> diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
>> index c95689586e19..8e561bac3133 100644
>> --- a/drivers/thermal/thermal_core.h
>> +++ b/drivers/thermal/thermal_core.h
>> @@ -141,6 +141,22 @@ thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
>> unsigned long new_state) {}
>> #endif /* CONFIG_THERMAL_STATISTICS */
>>
>> +enum thermal_device_mode
>> +thermal_zone_device_get_mode(struct thermal_zone_device *tz);
>> +
>> +int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
>> + enum thermal_device_mode mode);
>> +
>> +static inline int thermal_zone_device_enable(struct thermal_zone_device *tz)
>> +{
>> + return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_ENABLED);
>> +}
>> +
>> +static inline int thermal_zone_device_disable(struct thermal_zone_device *tz)
>> +{
>> + return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_DISABLED);
>> +}
>> +
>> /* device tree support */
>> #ifdef CONFIG_THERMAL_OF
>> int of_parse_thermal_zones(void);
>> diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
>> index aa99edb4dff7..cbb27b3c96d2 100644
>> --- a/drivers/thermal/thermal_sysfs.c
>> +++ b/drivers/thermal/thermal_sysfs.c
>> @@ -50,14 +50,8 @@ mode_show(struct device *dev, struct device_attribute *attr, char *buf)
>> {
>> struct thermal_zone_device *tz = to_thermal_zone(dev);
>> enum thermal_device_mode mode;
>> - int result;
>> -
>> - if (!tz->ops->get_mode)
>> - return -EPERM;
>>
>> - result = tz->ops->get_mode(tz, &mode);
>> - if (result)
>> - return result;
>> + mode = thermal_zone_device_get_mode(tz);
>>
>> return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled"
>> : "disabled");
>> @@ -74,9 +68,9 @@ mode_store(struct device *dev, struct device_attribute *attr,
>> 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;
>>
>> @@ -428,30 +422,13 @@ static struct attribute_group thermal_zone_attribute_group = {
>> .attrs = thermal_zone_dev_attrs,
>> };
>>
>> -/* We expose mode only if .get_mode is present */
>> static struct attribute *thermal_zone_mode_attrs[] = {
>> &dev_attr_mode.attr,
>> NULL,
>> };
>>
>> -static umode_t thermal_zone_mode_is_visible(struct kobject *kobj,
>> - struct attribute *attr,
>> - int attrno)
>> -{
>> - struct device *dev = container_of(kobj, struct device, kobj);
>> - struct thermal_zone_device *tz;
>> -
>> - tz = container_of(dev, struct thermal_zone_device, device);
>> -
>> - if (tz->ops->get_mode)
>> - return attr->mode;
>> -
>> - return 0;
>> -}
>> -
>> static struct attribute_group thermal_zone_mode_attribute_group = {
>> .attrs = thermal_zone_mode_attrs,
>> - .is_visible = thermal_zone_mode_is_visible,
>> };
>>
>> /* We expose passive only if passive trips are present */
>> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
>> index 216185bb3014..da4141697e2e 100644
>> --- a/include/linux/thermal.h
>> +++ b/include/linux/thermal.h
>> @@ -76,8 +76,6 @@ struct thermal_zone_device_ops {
>> struct thermal_cooling_device *);
>> int (*get_temp) (struct thermal_zone_device *, int *);
>> int (*set_trips) (struct thermal_zone_device *, int, int);
>> - int (*get_mode) (struct thermal_zone_device *,
>> - enum thermal_device_mode *);
>> int (*set_mode) (struct thermal_zone_device *,
>> enum thermal_device_mode);
>> int (*get_trip_type) (struct thermal_zone_device *, int,
>> @@ -128,6 +126,7 @@ struct thermal_cooling_device {
>> * @trip_temp_attrs: attributes for trip points for sysfs: trip temperature
>> * @trip_type_attrs: attributes for trip points for sysfs: trip type
>> * @trip_hyst_attrs: attributes for trip points for sysfs: trip hysteresis
>> + * @mode: current mode of this thermal zone
>> * @devdata: private pointer for device private data
>> * @trips: number of trip points the thermal zone supports
>> * @trips_disabled; bitmap for disabled trips
>> @@ -170,6 +169,7 @@ struct thermal_zone_device {
>> struct thermal_attr *trip_temp_attrs;
>> struct thermal_attr *trip_type_attrs;
>> struct thermal_attr *trip_hyst_attrs;
>> + enum thermal_device_mode mode;
>> void *devdata;
>> int trips;
>> unsigned long trips_disabled; /* bitmap for disabled trips */
>> @@ -264,6 +264,9 @@ struct thermal_zone_params {
>> int num_tbps; /* Number of tbp entries */
>> struct thermal_bind_params *tbp;
>>
>> + /* Initial mode of this thermal zone device */
>> + enum thermal_device_mode initial_mode;
>> +
>> /*
>> * Sustainable power (heat) that this thermal zone can dissipate in
>> * mW
>>
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