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Date: Thu, 23 Apr 2020 16:39:05 +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>,
Heiko Stuebner <heiko@...ech.de>,
Orson Zhai <orsonzhai@...il.com>,
Baolin Wang <baolin.wang7@...il.com>,
Chunyan Zhang <zhang.lyra@...il.com>,
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: [PATCH RESEND 1/2] thermal: core: Let thermal zone device's
mode be stored in its struct
Thank you for updating the patch, some more comments below.
On 4/22/20 6:12 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 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.
>
> struct thermal_zone_params gains a new member called initial_mode, which
> is used to set tzd's mode at registration time and if tzp is not provided
> to thermal_zone_device_register() then it is assumed that the initial
> mode is THERMAL_DEVICE_ENABLED.
>
> 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>
> ---
>
> Fixed two typos:
>
> - one found by kbuild test robot <lkp@...el.com> (missing semicolon
> in dummy implementation of thermal_zone_device_set_mode()
>
> - one found by myself (.initial_mode in int3400_thermal_params set to
> a nonexistent THERMAL_ZONE_DISABLED - should be THERMAL_DEVICE_DISABLED)
BTW Due to the above fixes the patch should have been be marked as v2,
not RESEND (please use RESEND only when posting again unchanged patch).
> drivers/acpi/thermal.c | 35 ++-----------
> .../ethernet/mellanox/mlxsw/core_thermal.c | 42 ----------------
> drivers/platform/x86/acerhdf.c | 17 ++-----
> drivers/thermal/da9062-thermal.c | 11 -----
> drivers/thermal/hisi_thermal.c | 6 ++-
> drivers/thermal/imx_thermal.c | 24 ++-------
> .../intel/int340x_thermal/int3400_thermal.c | 31 ++----------
> .../int340x_thermal/int340x_thermal_zone.c | 1 +
> .../thermal/intel/intel_quark_dts_thermal.c | 22 +++------
> drivers/thermal/intel/x86_pkg_temp_thermal.c | 1 +
> drivers/thermal/of-thermal.c | 24 +--------
> drivers/thermal/rockchip_thermal.c | 6 ++-
> drivers/thermal/sprd_thermal.c | 6 ++-
> drivers/thermal/thermal_core.c | 49 ++++++++++++++++---
> drivers/thermal/thermal_core.h | 3 ++
> drivers/thermal/thermal_sysfs.c | 29 ++---------
> include/linux/thermal.h | 22 ++++++++-
> 17 files changed, 107 insertions(+), 222 deletions(-)
>
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 19067a5e5293..d1f352ed5241 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,
> @@ -526,25 +525,10 @@ 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;
> @@ -552,20 +536,14 @@ static int thermal_set_mode(struct thermal_zone_device *thermal,
> /*
> * 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 +834,6 @@ 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,
> @@ -913,8 +890,6 @@ 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..5d28384046da 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,
> @@ -765,7 +726,6 @@ mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
> return err;
> }
>
> - module_tz->mode = THERMAL_DEVICE_ENABLED;
> return 0;
> }
>
> @@ -881,7 +841,6 @@ 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->mode = THERMAL_DEVICE_ENABLED;
> return 0;
> }
>
> @@ -1050,7 +1009,6 @@ 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..c3075d038095 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,
> };
> @@ -233,7 +223,6 @@ 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);
> 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 e761c9b42217..edbcb30815dc 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,
> @@ -831,7 +816,6 @@ 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 +869,7 @@ 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;
> + thermal_zone_device_disable(data->tz);
Since we now also (indirectly) call ->set_mode here the following code:
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);
should be removed from imx_thermal_suspend().
> clk_disable_unprepare(data->thermal_clk);
>
> return 0;
> @@ -905,7 +889,7 @@ 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;
> + thermal_zone_device_enable(data->tz);
Since we now also (indirectly) call ->set_mode here the following code:
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);
should be removed from imx_thermal_resume().
>
> return 0;
> }
> diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> index e802922a13cf..1751d4b103b1 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;
> @@ -230,54 +229,32 @@ 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
> - return -EINVAL;
> -
> - 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,
> };
>
> static struct thermal_zone_params int3400_thermal_params = {
> .governor_name = "user_space",
> .no_hwmon = true,
> + .initial_mode = THERMAL_DEVICE_DISABLED,
> };
>
> static int int3400_thermal_probe(struct platform_device *pdev)
> diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> index 432213272f1e..b36da9bfbf8a 100644
> --- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> @@ -208,6 +208,7 @@ EXPORT_SYMBOL_GPL(int340x_thermal_read_trips);
> static struct thermal_zone_params int340x_thermal_params = {
> .governor_name = "user_space",
> .no_hwmon = true,
> + .initial_mode = THERMAL_DEVICE_ENABLED,
> };
>
> struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
> 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,
> };
Please take a look at sys_set_mode():
static int sys_set_mode(struct thermal_zone_device *tzd,
enum thermal_device_mode mode)
{
int ret;
mutex_lock(&dts_update_mutex);
if (mode == THERMAL_DEVICE_ENABLED)
ret = soc_dts_enable(tzd);
else
ret = soc_dts_disable(tzd);
mutex_unlock(&dts_update_mutex);
return ret;
}
and alloc_soc_dts():
static struct soc_sensor_entry *alloc_soc_dts(void)
{
...
aux_entry->tzone = thermal_zone_device_register("quark_dts",
QRK_MAX_DTS_TRIPS,
wr_mask,
aux_entry, &tzone_ops, NULL, 0, polling_delay);
if (IS_ERR(aux_entry->tzone)) {
err = PTR_ERR(aux_entry->tzone);
goto err_ret;
}
mutex_lock(&dts_update_mutex);
err = soc_dts_enable(aux_entry->tzone);
mutex_unlock(&dts_update_mutex);
if (err)
goto err_aux_status;
...
}
Since ->set_mode is now called through thermal_zone_device_register()
the following code should be removed:
mutex_lock(&dts_update_mutex);
err = soc_dts_enable(aux_entry->tzone);
mutex_unlock(&dts_update_mutex);
if (err)
goto err_aux_status;
> diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
> index a006b9fd1d72..cb810a02aab0 100644
> --- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
> +++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
> @@ -56,6 +56,7 @@ struct zone_device {
>
> static struct thermal_zone_params pkg_temp_tz_params = {
> .no_hwmon = true,
> + .initial_mode = THERMAL_DEVICE_ENABLED,
> };
>
> /* Keep track of how many zone pointers we allocated in init() */
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index 874a47d6923f..48787a5576d8 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,
> @@ -554,7 +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;
> @@ -979,7 +959,6 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
>
> finish:
> of_node_put(child);
> - tz->mode = THERMAL_DEVICE_DISABLED;
>
> return tz;
>
> @@ -1120,6 +1099,7 @@ 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/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 c06550930979..a012d77dd602 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -463,6 +463,44 @@ 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;
Please remove above checks, they really are redundant.
> + mutex_lock(&tz->lock);
> +
> + if (tz->ops->set_mode)
> + ret = tz->ops->set_mode(tz, mode);
> +
> + tz->mode = mode;
This should be:
if (!ret)
tz->mode = mode;
as we shouldn't change the mode information if ->set_mode has failed.
> +
> + mutex_unlock(&tz->lock);
> +
> + thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(thermal_zone_device_set_mode);
> +
> void thermal_zone_device_update(struct thermal_zone_device *tz,
> enum thermal_notify_event event)
> {
> @@ -1236,6 +1274,7 @@ thermal_zone_device_register(const char *type, int trips, int mask,
> int result;
> int count;
> struct thermal_governor *governor;
> + enum thermal_device_mode mode;
>
> if (!type || strlen(type) == 0) {
> pr_err("Error: No thermal zone type defined\n");
> @@ -1340,9 +1379,9 @@ thermal_zone_device_register(const char *type, int trips, int mask,
> INIT_DELAYED_WORK(&tz->poll_queue, thermal_zone_device_check);
>
> thermal_zone_device_reset(tz);
> - /* Update the new thermal zone and mark it as already updated. */
> - if (atomic_cmpxchg(&tz->need_update, 1, 0))
> - thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
> +
> + mode = tzp ? tzp->initial_mode : THERMAL_DEVICE_ENABLED;
> + thermal_zone_device_set_mode(tz, mode);
The setting of tz->need_update earlier in thermal_zone_device_register():
/* A new thermal zone needs to be updated anyway. */
atomic_set(&tz->need_update, 1);
should also be removed now.
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
>
> return tz;
>
> @@ -1473,9 +1512,7 @@ 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..ff5519adb68a 100644
> --- a/drivers/thermal/thermal_core.h
> +++ b/drivers/thermal/thermal_core.h
> @@ -141,6 +141,9 @@ 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);
> +
> /* 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..c789d4ff6e63 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
> @@ -395,6 +398,8 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
> unsigned int);
> int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
> struct thermal_cooling_device *);
> +int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
> + enum thermal_device_mode mode);
> void thermal_zone_device_update(struct thermal_zone_device *,
> enum thermal_notify_event);
>
> @@ -426,6 +431,9 @@ static inline struct thermal_zone_device *thermal_zone_device_register(
> static inline void thermal_zone_device_unregister(
> struct thermal_zone_device *tz)
> { }
> +int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
> + enum thermal_device_mode mode)
> +{ return -EINVAL; }
> static inline struct thermal_cooling_device *
> thermal_cooling_device_register(char *type, void *devdata,
> const struct thermal_cooling_device_ops *ops)
> @@ -465,4 +473,14 @@ static inline void thermal_notify_framework(struct thermal_zone_device *tz,
> { }
> #endif /* CONFIG_THERMAL */
>
> +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);
> +}
> +
> #endif /* __THERMAL_H__ */
>
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