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Date: Thu, 11 Apr 2013 16:48:03 -0400
From: Eduardo Valentin <eduardo.valentin@...com>
To: Amit Daniel Kachhap <amit.daniel@...sung.com>
CC: <linux-pm@...r.kernel.org>,
Thomas Abraham <thomas.abraham@...aro.org>,
Zhang Rui <rui.zhang@...el.com>,
<linux-samsung-soc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <amit.kachhap@...il.com>,
Kukjin Kim <kgene.kim@...sung.com>, <eduardo.valentin@...com>
Subject: Re: [5/9] thermal: exynos: Make the zone handling dependent on trip
count
On 26-03-2013 07:33, Amit Daniel Kachhap wrote:
> This code changes the zone handling to use the trip count passed
> by the TMU driver. This also helps in adding more zone support.
>
> Signed-off-by: Amit Daniel Kachhap <amit.daniel@...sung.com>
>
> ---
> drivers/thermal/samsung/exynos_common.c | 56 +++++++++++++------------
> drivers/thermal/samsung/exynos_common.h | 13 +++---
> include/linux/platform_data/exynos_thermal.h | 7 ++-
> 3 files changed, 40 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/thermal/samsung/exynos_common.c b/drivers/thermal/samsung/exynos_common.c
> index 649d67c..0c0098d 100644
> --- a/drivers/thermal/samsung/exynos_common.c
> +++ b/drivers/thermal/samsung/exynos_common.c
> @@ -84,17 +84,16 @@ 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:
> - *type = THERMAL_TRIP_CRITICAL;
> - break;
> - default:
> + struct exynos_thermal_zone *th_zone = thermal->devdata;
> + int max_trip = th_zone->sensor_conf->trip_data.trip_count;
> +
> + if (trip < 0 || trip >= max_trip)
> return -EINVAL;
> - }
> + else if (trip == (max_trip - 1))
> + *type = THERMAL_TRIP_CRITICAL;
> + else
> + *type = THERMAL_TRIP_ACTIVE;
> +
> return 0;
> }
>
> @@ -103,8 +102,9 @@ 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];
> @@ -118,10 +118,10 @@ 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);
> }
>
> int exynos_get_frequency_level(unsigned int cpu, unsigned int freq)
> @@ -157,7 +157,7 @@ static int exynos_bind(struct thermal_zone_device *thermal,
> tab_size = data->cooling_data.freq_clip_count;
>
> if (tab_ptr == NULL || tab_size == 0)
> - return -EINVAL;
> + return 0;
>
> /* find the cooling device registered*/
> for (i = 0; i < th_zone->cool_dev_size; i++)
> @@ -206,7 +206,7 @@ static int exynos_unbind(struct thermal_zone_device *thermal,
> tab_size = data->cooling_data.freq_clip_count;
>
> if (tab_size == 0)
> - return -EINVAL;
> + return 0;
>
> /* find the cooling device registered*/
> for (i = 0; i < th_zone->cool_dev_size; i++)
The above two chunks are confusing. I dont understand how they are now
supposed to be valid settings.
> @@ -366,19 +366,21 @@ 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;
> + if (sensor_conf->cooling_data.freq_clip_count > 0) {
> + 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;
> + }
> + 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);
> + 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_common.h b/drivers/thermal/samsung/exynos_common.h
> index b8d289e..453e09a 100644
> --- a/drivers/thermal/samsung/exynos_common.h
> +++ b/drivers/thermal/samsung/exynos_common.h
> @@ -27,23 +27,22 @@
> #define SENSOR_NAME_LEN 16
> #define MAX_TRIP_COUNT 8
> #define MAX_COOLING_DEVICE 4
> -#define MAX_THRESHOLD_LEVS 4
> +#define MAX_THRESHOLD_LEVS 5
>
> #define ACTIVE_INTERVAL 500
> #define IDLE_INTERVAL 10000
> #define MCELSIUS 1000
>
> /* CPU Zone information */
> -#define PANIC_ZONE 4
> -#define WARN_ZONE 3
> -#define MONITOR_ZONE 2
> -#define SAFE_ZONE 1
> +#define PANIC_ZONE 5
> +#define ALARM_ZONE 4
> +#define WARN_ZONE 3
> +#define MONITOR_ZONE 2
> +#define SAFE_ZONE 1
>
Updating this does not seam to be part of the intent of this patch. You
probably want to send a separate patch for this.
> #define GET_ZONE(trip) (trip + 2)
> #define GET_TRIP(zone) (zone - 2)
>
> -#define EXYNOS_ZONE_COUNT 3
> -
> struct thermal_trip_point_conf {
> int trip_val[MAX_TRIP_COUNT];
> int trip_count;
> diff --git a/include/linux/platform_data/exynos_thermal.h b/include/linux/platform_data/exynos_thermal.h
> index da7e627..893b758 100644
> --- a/include/linux/platform_data/exynos_thermal.h
> +++ b/include/linux/platform_data/exynos_thermal.h
> @@ -23,6 +23,8 @@
> #define _LINUX_EXYNOS_THERMAL_H
> #include <linux/cpu_cooling.h>
>
> +#define MAX_TRIP 5
> +
Should MAX_TRIP/THRESHOLD_LEVEL/PANIC_ZONE be somewhat same
> enum calibration_type {
> TYPE_ONE_POINT_TRIMMING,
> TYPE_TWO_POINT_TRIMMING,
> @@ -100,11 +102,12 @@ struct freq_clip_table {
> struct exynos_tmu_platform_data {
> u8 threshold;
> u8 threshold_falling;
> - u8 trigger_levels[4];
> + u8 trigger_levels[MAX_TRIP];
> bool trigger_level0_en;
> bool trigger_level1_en;
> bool trigger_level2_en;
> bool trigger_level3_en;
> + bool trigger_level4_en;
>
> u8 gain;
> u8 reference_voltage;
> @@ -113,7 +116,7 @@ struct exynos_tmu_platform_data {
>
> enum calibration_type cal_type;
> enum soc_type type;
> - struct freq_clip_table freq_tab[4];
> + struct freq_clip_table freq_tab[MAX_TRIP];
> unsigned int freq_tab_count;
> };
> #endif /* _LINUX_EXYNOS_THERMAL_H */
>
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