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Date: Thu, 10 Dec 2020 16:25:34 +0000
From: Lukasz Luba <lukasz.luba@....com>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: rui.zhang@...el.com, amitk@...nel.org,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v2 4/4] thermal/core: Remove ms based delay fields
On 12/7/20 7:09 PM, Daniel Lezcano wrote:
> The code does no longer use the ms unit based fields to set the
> delays as they are replaced by the jiffies.
>
> Remove them and replace their user to use the jiffies version instead.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
> drivers/platform/x86/acerhdf.c | 3 ++-
> drivers/thermal/da9062-thermal.c | 4 ++--
> drivers/thermal/gov_power_allocator.c | 2 +-
> drivers/thermal/thermal_core.c | 2 +-
> drivers/thermal/thermal_core.h | 2 --
> drivers/thermal/thermal_sysfs.c | 2 +-
> drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 6 ++++--
> include/linux/thermal.h | 7 -------
> 8 files changed, 11 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
> index 7b26f601b407..b7dbcf6be13e 100644
> --- a/drivers/platform/x86/acerhdf.c
> +++ b/drivers/platform/x86/acerhdf.c
> @@ -336,7 +336,8 @@ static void acerhdf_check_param(struct thermal_zone_device *thermal)
> pr_notice("interval changed to: %d\n", interval);
>
> if (thermal)
> - thermal->polling_delay_ms = interval*1000;
> + thermal->polling_delay_jiffies =
> + msecs_to_jiffies(interval * 1000);
>
> prev_interval = interval;
> }
> diff --git a/drivers/thermal/da9062-thermal.c b/drivers/thermal/da9062-thermal.c
> index ebb3d0b4a5be..180edec34e07 100644
> --- a/drivers/thermal/da9062-thermal.c
> +++ b/drivers/thermal/da9062-thermal.c
> @@ -95,7 +95,7 @@ static void da9062_thermal_poll_on(struct work_struct *work)
> thermal_zone_device_update(thermal->zone,
> THERMAL_EVENT_UNSPECIFIED);
>
> - delay = msecs_to_jiffies(thermal->zone->passive_delay_ms);
> + delay = thermal->zone->passive_delay_jiffies;
We would use rounding down value to full seconds, but I couldn't
find any odd values in DT for this devices. So it should be OK.
> queue_delayed_work(system_freezable_wq, &thermal->work, delay);
> return;
> }
> @@ -245,7 +245,7 @@ static int da9062_thermal_probe(struct platform_device *pdev)
>
> dev_dbg(&pdev->dev,
> "TJUNC temperature polling period set at %d ms\n",
> - thermal->zone->passive_delay_ms);
> + jiffies_to_msecs(thermal->zone->passive_delay_jiffies));
>
> ret = platform_get_irq_byname(pdev, "THERMAL");
> if (ret < 0) {
> diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
> index f7a663f698d4..f8c3d1e40b86 100644
> --- a/drivers/thermal/gov_power_allocator.c
> +++ b/drivers/thermal/gov_power_allocator.c
> @@ -258,7 +258,7 @@ static u32 pid_controller(struct thermal_zone_device *tz,
> * power being applied, slowing down the controller)
> */
> d = mul_frac(tz->tzp->k_d, err - params->prev_err);
> - d = div_frac(d, tz->passive_delay_ms);
> + d = div_frac(d, jiffies_to_msecs(tz->passive_delay_jiffies));
> params->prev_err = err;
>
> power_range = p + i + d;
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 16ef5d652d85..aff15c6b1c61 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -313,7 +313,7 @@ static void monitor_thermal_zone(struct thermal_zone_device *tz)
>
> if (!stop && tz->passive)
> thermal_zone_device_set_polling(tz, tz->passive_delay_jiffies);
> - else if (!stop && tz->polling_delay_ms)
> + else if (!stop && tz->polling_delay_jiffies)
> thermal_zone_device_set_polling(tz, tz->polling_delay_jiffies);
> else
> thermal_zone_device_set_polling(tz, 0);
> diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
> index 2c9551ed5ef8..5baa308ee7a5 100644
> --- a/drivers/thermal/thermal_core.h
> +++ b/drivers/thermal/thermal_core.h
> @@ -131,7 +131,6 @@ void thermal_zone_set_trips(struct thermal_zone_device *tz);
> static inline void thermal_zone_set_passive_delay(
> struct thermal_zone_device *tz, int delay_ms)
> {
> - tz->passive_delay_ms = delay_ms;
> tz->passive_delay_jiffies = msecs_to_jiffies(delay_ms);
> if (delay_ms > 1000)
> tz->passive_delay_jiffies = round_jiffies(tz->passive_delay_jiffies);
> @@ -140,7 +139,6 @@ static inline void thermal_zone_set_passive_delay(
> static inline void thermal_zone_set_polling_delay(
> struct thermal_zone_device *tz, int delay_ms)
> {
> - tz->polling_delay_ms = delay_ms;
> tz->polling_delay_jiffies = msecs_to_jiffies(delay_ms);
> if (delay_ms > 1000)
> tz->polling_delay_jiffies = round_jiffies(tz->polling_delay_jiffies);
> diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
> index 9598b288a0a1..8532b1dd0608 100644
> --- a/drivers/thermal/thermal_sysfs.c
> +++ b/drivers/thermal/thermal_sysfs.c
> @@ -233,7 +233,7 @@ passive_store(struct device *dev, struct device_attribute *attr,
> return -EINVAL;
>
> if (state && !tz->forced_passive) {
> - if (!tz->passive_delay_ms)
> + if (!tz->passive_delay_jiffies)
> thermal_zone_set_passive_delay(tz, 1000);
> thermal_zone_device_rebind_exception(tz, "Processor",
> sizeof("Processor"));
> diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
> index 4baff19e1142..f84375865c97 100644
> --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
> +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
> @@ -166,6 +166,7 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
> char *domain)
> {
> struct ti_thermal_data *data;
> + int interval;
>
> data = ti_bandgap_get_sensor_data(bgp, id);
>
> @@ -183,9 +184,10 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
> return PTR_ERR(data->ti_thermal);
> }
>
> + interval = jiffies_to_msecs(data->ti_thermal->polling_delay_jiffies);
Same here, so it should be OK.
> +
> ti_bandgap_set_sensor_data(bgp, id, data);
> - ti_bandgap_write_update_interval(bgp, data->sensor_id,
> - data->ti_thermal->polling_delay_ms);
> + ti_bandgap_write_update_interval(bgp, data->sensor_id, interval);
>
> return 0;
> }
> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> index 5dd9bdb6c6ad..f23a388ded15 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -116,13 +116,8 @@ struct thermal_cooling_device {
> * @devdata: private pointer for device private data
> * @trips: number of trip points the thermal zone supports
> * @trips_disabled; bitmap for disabled trips
> - * @passive_delay_ms: number of milliseconds to wait between polls when
> - * performing passive cooling.
> * @passive_delay_jiffies: number of jiffies to wait between polls when
> * performing passive cooling.
> - * @polling_delay_ms: number of milliseconds to wait between polls when
> - * checking whether trip points have been crossed (0 for
> - * interrupt driven systems)
> * @polling_delay_jiffies: number of jiffies to wait between polls when
> * checking whether trip points have been crossed (0 for
> * interrupt driven systems)
> @@ -164,8 +159,6 @@ struct thermal_zone_device {
> void *devdata;
> int trips;
> unsigned long trips_disabled; /* bitmap for disabled trips */
> - int passive_delay_ms;
> - int polling_delay_ms;
> int passive_delay_jiffies;
> int polling_delay_jiffies;
> int temperature;
>
LGTM
Reviewed-by: Lukasz Luba <lukasz.luba@....com>
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