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Date: Tue, 26 Mar 2013 17:03:58 +0530
From: Amit Daniel Kachhap <amit.daniel@...sung.com>
To: linux-pm@...r.kernel.org
Cc: 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>
Subject: [PATCH 5/9] thermal: exynos: Make the zone handling dependent on trip count
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++)
@@ -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
#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
+
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 */
--
1.7.1
--
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