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Message-ID: <51C86897.1080100@ti.com>
Date: Mon, 24 Jun 2013 11:41:11 -0400
From: Eduardo Valentin <eduardo.valentin@...com>
To: Amit Daniel Kachhap <amit.daniel@...sung.com>
CC: <linux-pm@...r.kernel.org>, Zhang Rui <rui.zhang@...el.com>,
Eduardo Valentin <eduardo.valentin@...com>,
<linux-samsung-soc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <amit.kachhap@...il.com>,
Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: [PATCH V7 16/30] thermal: exynos: Make the zone handling use
trip information
On 24-06-2013 06:50, Amit Daniel Kachhap wrote:
> This code simplifies the zone handling to use the trip information passed
> by the TMU driver and not the hardcoded macros. This also helps in adding
> more zone support.
>
> Acked-by: Kukjin Kim <kgene.kim@...sung.com>
> Acked-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
> Signed-off-by: Amit Daniel Kachhap <amit.daniel@...sung.com>
> ---
> drivers/thermal/samsung/exynos_thermal_common.c | 67 ++++++++++++++---------
> drivers/thermal/samsung/exynos_thermal_common.h | 3 +-
> drivers/thermal/samsung/exynos_tmu.c | 5 ++-
> 3 files changed, 47 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/thermal/samsung/exynos_thermal_common.c b/drivers/thermal/samsung/exynos_thermal_common.c
> index 99318e5..ecf95da 100644
> --- a/drivers/thermal/samsung/exynos_thermal_common.c
> +++ b/drivers/thermal/samsung/exynos_thermal_common.c
> @@ -79,17 +79,24 @@ static int exynos_set_mode(struct thermal_zone_device *thermal,
> static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
> enum thermal_trip_type *type)
> {
> - switch (GET_ZONE(trip)) {
> - case MONITOR_ZONE:
> - case WARN_ZONE:
> - *type = THERMAL_TRIP_ACTIVE;
> - break;
> - case PANIC_ZONE:
> + struct exynos_thermal_zone *th_zone = thermal->devdata;
> + int max_trip = th_zone->sensor_conf->trip_data.trip_count;
> + int trip_type;
> +
> + if (trip < 0 || trip >= max_trip)
> + return -EINVAL;
> +
> + trip_type = th_zone->sensor_conf->trip_data.trip_type[trip];
> +
> + if (trip_type == SW_TRIP)
> *type = THERMAL_TRIP_CRITICAL;
> - break;
> - default:
> + else if (trip_type == THROTTLE_ACTIVE)
> + *type = THERMAL_TRIP_ACTIVE;
> + else if (trip_type == THROTTLE_PASSIVE)
> + *type = THERMAL_TRIP_PASSIVE;
> + else
> return -EINVAL;
> - }
> +
> return 0;
> }
>
> @@ -98,8 +105,9 @@ static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
> unsigned long *temp)
> {
> struct exynos_thermal_zone *th_zone = thermal->devdata;
> + int max_trip = th_zone->sensor_conf->trip_data.trip_count;
>
> - if (trip < GET_TRIP(MONITOR_ZONE) || trip > GET_TRIP(PANIC_ZONE))
> + if (trip < 0 || trip >= max_trip)
> return -EINVAL;
>
> *temp = th_zone->sensor_conf->trip_data.trip_val[trip];
> @@ -113,10 +121,10 @@ static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
> static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
> unsigned long *temp)
> {
> - int ret;
> - /* Panic zone */
> - ret = exynos_get_trip_temp(thermal, GET_TRIP(PANIC_ZONE), temp);
> - return ret;
> + struct exynos_thermal_zone *th_zone = thermal->devdata;
> + int max_trip = th_zone->sensor_conf->trip_data.trip_count;
> + /* Get the temp of highest trip*/
> + return exynos_get_trip_temp(thermal, max_trip - 1, temp);
> }
>
> /* Bind callback functions for thermal zone */
> @@ -348,19 +356,28 @@ int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
> return -ENOMEM;
>
> th_zone->sensor_conf = sensor_conf;
> - cpumask_set_cpu(0, &mask_val);
> - th_zone->cool_dev[0] = cpufreq_cooling_register(&mask_val);
> - if (IS_ERR(th_zone->cool_dev[0])) {
> - pr_err("Failed to register cpufreq cooling device\n");
> - ret = -EINVAL;
> - goto err_unregister;
> + /*
> + * TODO: 1) Handle multiple cooling devices in a thermal zone
> + * 2) Add a flag/name in cooling info to map to specific
> + * sensor
> + */
> + if (sensor_conf->cooling_data.freq_clip_count > 0) {
> + cpumask_set_cpu(0, &mask_val);
> + th_zone->cool_dev[th_zone->cool_dev_size] =
> + cpufreq_cooling_register(&mask_val);
> + if (IS_ERR(th_zone->cool_dev[0])) {
If you assign to 'th_zone->cool_dev[th_zone->cool_dev_size]', you have
to check against the same, not against th_zone->cool_dev[0].
> + pr_err("Failed to register cpufreq cooling device\n");
> + ret = -EINVAL;
> + goto err_unregister;
> + }
> + th_zone->cool_dev_size++;
> }
> - th_zone->cool_dev_size++;
>
> - th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name,
> - EXYNOS_ZONE_COUNT, 0, th_zone, &exynos_dev_ops, NULL, 0,
> - sensor_conf->trip_data.trigger_falling ?
> - 0 : IDLE_INTERVAL);
> + th_zone->therm_dev = thermal_zone_device_register(
> + sensor_conf->name, sensor_conf->trip_data.trip_count,
> + 0, th_zone, &exynos_dev_ops, NULL, 0,
> + sensor_conf->trip_data.trigger_falling ? 0 :
> + IDLE_INTERVAL);
>
> if (IS_ERR(th_zone->therm_dev)) {
> pr_err("Failed to register thermal zone device\n");
> diff --git a/drivers/thermal/samsung/exynos_thermal_common.h b/drivers/thermal/samsung/exynos_thermal_common.h
> index 6ca3096..bfcf69e 100644
> --- a/drivers/thermal/samsung/exynos_thermal_common.h
> +++ b/drivers/thermal/samsung/exynos_thermal_common.h
> @@ -42,8 +42,6 @@
> #define GET_ZONE(trip) (trip + 2)
> #define GET_TRIP(zone) (zone - 2)
>
> -#define EXYNOS_ZONE_COUNT 3
> -
> enum trigger_type {
> THROTTLE_ACTIVE = 1,
> THROTTLE_PASSIVE,
> @@ -69,6 +67,7 @@ struct freq_clip_table {
>
> struct thermal_trip_point_conf {
> int trip_val[MAX_TRIP_COUNT];
> + int trip_type[MAX_TRIP_COUNT];
> int trip_count;
> unsigned char trigger_falling;
> };
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index 40e0cfd..acbd295 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -509,9 +509,12 @@ static int exynos_tmu_probe(struct platform_device *pdev)
> pdata->trigger_enable[1] + pdata->trigger_enable[2]+
> pdata->trigger_enable[3];
>
> - for (i = 0; i < exynos_sensor_conf.trip_data.trip_count; i++)
> + for (i = 0; i < exynos_sensor_conf.trip_data.trip_count; i++) {
> exynos_sensor_conf.trip_data.trip_val[i] =
> pdata->threshold + pdata->trigger_levels[i];
> + exynos_sensor_conf.trip_data.trip_type[i] =
> + pdata->trigger_type[i];
> + }
>
> exynos_sensor_conf.trip_data.trigger_falling = pdata->threshold_falling;
>
>
--
You have got to be excited about what you are doing. (L. Lamport)
Eduardo Valentin
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