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Message-ID: <4511659.LvFx2qVVIh@kreacher>
Date: Tue, 22 Aug 2023 13:40:06 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>,
Linux ACPI <linux-acpi@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Zhang Rui <rui.zhang@...el.com>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Amit Kucheria <amitk@...nel.org>, linux-omap@...r.kernel.org
Subject: [PATCH v1] thermal: core: Rework .get_trend() thermal zone callback
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Passing a struct thermal_trip pointer instead of a trip index to the
.get_trend() thermal zone callback allows one of its 2 implementations,
the thermal_get_trend() function in the ACPI thermal driver, to be
simplified quite a bit, and the other implementation of it in the
ti-soc-thermal driver does not even use the relevant callback argument.
For this reason, change the .get_trend() thermal zone callback
definition and adjust the related code accordingly.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
This is based on the thermal branch in linux-pm.git (which is also
included in the linux-next branch of that tree).
---
drivers/acpi/thermal.c | 41 +++++++++------------
drivers/thermal/thermal_core.h | 2 -
drivers/thermal/thermal_helpers.c | 3 +
drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 3 +
include/linux/thermal.h | 30 +++++++--------
5 files changed, 38 insertions(+), 41 deletions(-)
Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -53,6 +53,20 @@ enum thermal_notify_event {
THERMAL_EVENT_KEEP_ALIVE, /* Request for user space handler to respond */
};
+/**
+ * struct thermal_trip - representation of a point in temperature domain
+ * @temperature: temperature value in miliCelsius
+ * @hysteresis: relative hysteresis in miliCelsius
+ * @type: trip point type
+ * @priv: pointer to driver data associated with this trip
+ */
+struct thermal_trip {
+ int temperature;
+ int hysteresis;
+ enum thermal_trip_type type;
+ void *priv;
+};
+
struct thermal_zone_device_ops {
int (*bind) (struct thermal_zone_device *,
struct thermal_cooling_device *);
@@ -70,26 +84,12 @@ struct thermal_zone_device_ops {
int (*set_trip_hyst) (struct thermal_zone_device *, int, int);
int (*get_crit_temp) (struct thermal_zone_device *, int *);
int (*set_emul_temp) (struct thermal_zone_device *, int);
- int (*get_trend) (struct thermal_zone_device *, int,
+ int (*get_trend) (struct thermal_zone_device *, struct thermal_trip *,
enum thermal_trend *);
void (*hot)(struct thermal_zone_device *);
void (*critical)(struct thermal_zone_device *);
};
-/**
- * struct thermal_trip - representation of a point in temperature domain
- * @temperature: temperature value in miliCelsius
- * @hysteresis: relative hysteresis in miliCelsius
- * @type: trip point type
- * @priv: pointer to driver data associated with this trip
- */
-struct thermal_trip {
- int temperature;
- int hysteresis;
- enum thermal_trip_type type;
- void *priv;
-};
-
struct thermal_cooling_device_ops {
int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
Index: linux-pm/drivers/acpi/thermal.c
===================================================================
--- linux-pm.orig/drivers/acpi/thermal.c
+++ linux-pm/drivers/acpi/thermal.c
@@ -492,26 +492,22 @@ static int thermal_get_temp(struct therm
}
static int thermal_get_trend(struct thermal_zone_device *thermal,
- int trip_index, enum thermal_trend *trend)
+ struct thermal_trip *trip,
+ enum thermal_trend *trend)
{
struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
struct acpi_thermal_trip *acpi_trip;
- int t, i;
+ int t;
- if (!tz || trip_index < 0)
+ if (!tz || !trip)
return -EINVAL;
- if (tz->trips.critical.valid)
- trip_index--;
-
- if (tz->trips.hot.valid)
- trip_index--;
-
- if (trip_index < 0)
+ acpi_trip = trip->priv;
+ if (!acpi_trip || !acpi_trip->valid)
return -EINVAL;
- acpi_trip = &tz->trips.passive.trip;
- if (acpi_trip->valid && !trip_index--) {
+ switch (trip->type) {
+ case THERMAL_TRIP_PASSIVE:
t = tz->trips.passive.tc1 * (tz->temperature -
tz->last_temperature) +
tz->trips.passive.tc2 * (tz->temperature -
@@ -524,19 +520,18 @@ static int thermal_get_trend(struct ther
*trend = THERMAL_TREND_STABLE;
return 0;
- }
-
- t = acpi_thermal_temp(tz, tz->temperature);
- for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
- acpi_trip = &tz->trips.active[i].trip;
- if (acpi_trip->valid && !trip_index--) {
- if (t > acpi_thermal_temp(tz, acpi_trip->temperature)) {
- *trend = THERMAL_TREND_RAISING;
- return 0;
- }
+ case THERMAL_TRIP_ACTIVE:
+ t = acpi_thermal_temp(tz, tz->temperature);
+ if (t <= trip->temperature)
break;
- }
+
+ *trend = THERMAL_TREND_RAISING;
+
+ return 0;
+
+ default:
+ break;
}
return -EINVAL;
Index: linux-pm/drivers/thermal/thermal_core.h
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.h
+++ linux-pm/drivers/thermal/thermal_core.h
@@ -70,7 +70,7 @@ static inline bool cdev_is_power_actor(s
void thermal_cdev_update(struct thermal_cooling_device *);
void __thermal_cdev_update(struct thermal_cooling_device *cdev);
-int get_tz_trend(struct thermal_zone_device *tz, int trip);
+int get_tz_trend(struct thermal_zone_device *tz, int trip_index);
struct thermal_instance *
get_thermal_instance(struct thermal_zone_device *tz,
Index: linux-pm/drivers/thermal/thermal_helpers.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_helpers.c
+++ linux-pm/drivers/thermal/thermal_helpers.c
@@ -22,8 +22,9 @@
#include "thermal_core.h"
#include "thermal_trace.h"
-int get_tz_trend(struct thermal_zone_device *tz, int trip)
+int get_tz_trend(struct thermal_zone_device *tz, int trip_index)
{
+ struct thermal_trip *trip = tz->trips ? &tz->trips[trip_index] : NULL;
enum thermal_trend trend;
if (tz->emul_temperature || !tz->ops->get_trend ||
Index: linux-pm/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
===================================================================
--- linux-pm.orig/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
+++ linux-pm/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
@@ -109,7 +109,8 @@ static inline int __ti_thermal_get_temp(
return ret;
}
-static int __ti_thermal_get_trend(struct thermal_zone_device *tz, int trip, enum thermal_trend *trend)
+static int __ti_thermal_get_trend(struct thermal_zone_device *tz,
+ struct thermal_trip *trip, enum thermal_trend *trend)
{
struct ti_thermal_data *data = thermal_zone_device_priv(tz);
struct ti_bandgap *bgp;
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