[PATCH v2 03/11] thermal/acpi: Convert the acpi thermal trips to an array

Daniel Lezcano
2023-02-03T17:44:48Z

Instead of having multiple trip points in the structure fields for
each trip type, let's create an array of trip points.

No functional changes.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/acpi/thermal.c | 130 ++++++++++++++++++++++-------------------
1 file changed, 69 insertions(+), 61 deletions(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index e27b0b71fcf8..6b07de78c4c6 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -104,6 +104,15 @@ static struct acpi_driver acpi_thermal_driver = {
.drv.pm = &acpi_thermal_pm,
};

+enum {
+ ACPI_THERMAL_TRIP_CRITICAL,
+ ACPI_THERMAL_TRIP_HOT,
+ ACPI_THERMAL_TRIP_PASSIVE,
+ ACPI_THERMAL_TRIP_ACTIVE
+};
+
+#define ACPI_THERMAL_TRIP_MAX (ACPI_THERMAL_TRIP_ACTIVE + ACPI_THERMAL_MAX_ACTIVE)
+
struct acpi_thermal_state {
u8 critical:1;
u8 hot:1;
@@ -143,9 +152,7 @@ struct acpi_thermal {
volatile u8 zombie;
struct acpi_thermal_flags flags;
struct acpi_thermal_state state;
- struct acpi_thermal_trip critical;
- struct acpi_thermal_trip hot;
- struct acpi_thermal_trip passive;
+ struct acpi_thermal_trip trips[ACPI_THERMAL_TRIP_MAX];
struct acpi_thermal_trip active[ACPI_THERMAL_MAX_ACTIVE];
struct acpi_handle_list devices;
struct thermal_zone_device *thermal_zone;
@@ -251,7 +258,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
/* Critical Shutdown */
if (flag & ACPI_TRIPS_CRITICAL) {
status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, &tmp);
- tz->critical.temperature = tmp;
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature = tmp;

/*
* Treat freezing temperatures as invalid as well; some
@@ -260,32 +267,32 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
* ... so lets discard those as invalid.
*/
if (ACPI_FAILURE(status)) {
- tz->critical.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid = 0;
acpi_handle_debug(tz->device->handle,
"No critical threshold\n");
} else if (tmp <= 2732) {
pr_info(FW_BUG "Invalid critical threshold (%llu)\n", tmp);
- tz->critical.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid = 0;
} else {
- tz->critical.flags.valid = 1;
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid = 1;
acpi_handle_debug(tz->device->handle,
"Found critical threshold [%lu]\n",
- tz->critical.temperature);
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature);
}

- if (tz->critical.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid) {
if (crt == -1) {
- tz->critical.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid = 0;
} else if (crt > 0) {
unsigned long crt_k = celsius_to_deci_kelvin(crt);

/*
* Allow override critical threshold
*/
- if (crt_k > tz->critical.temperature)
+ if (crt_k > tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature)
pr_info("Critical threshold %d C\n", crt);

- tz->critical.temperature = crt_k;
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature = crt_k;
}
}
}
@@ -294,22 +301,22 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
if (flag & ACPI_TRIPS_HOT) {
status = acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, &tmp);
if (ACPI_FAILURE(status)) {
- tz->hot.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid = 0;
acpi_handle_debug(tz->device->handle,
"No hot threshold\n");
} else {
- tz->hot.temperature = tmp;
- tz->hot.flags.valid = 1;
+ tz->trips[ACPI_THERMAL_TRIP_HOT].temperature = tmp;
+ tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid = 1;
acpi_handle_debug(tz->device->handle,
"Found hot threshold [%lu]\n",
- tz->hot.temperature);
+ tz->trips[ACPI_THERMAL_TRIP_HOT].temperature);
}
}

/* Passive (optional) */
- if (((flag & ACPI_TRIPS_PASSIVE) && tz->passive.flags.valid) ||
+ if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid) ||
flag == ACPI_TRIPS_INIT) {
- valid = tz->passive.flags.valid;
+ valid = tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid;
if (psv == -1) {
status = AE_SUPPORT;
} else if (psv > 0) {
@@ -321,53 +328,53 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
}

if (ACPI_FAILURE(status)) {
- tz->passive.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 0;
} else {
- tz->passive.temperature = tmp;
- tz->passive.flags.valid = 1;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].temperature = tmp;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 1;
if (flag == ACPI_TRIPS_INIT) {
status = acpi_evaluate_integer(tz->device->handle,
"_TC1", NULL, &tmp);
if (ACPI_FAILURE(status))
- tz->passive.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 0;
else
- tz->passive.tc1 = tmp;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].tc1 = tmp;
status = acpi_evaluate_integer(tz->device->handle,
"_TC2", NULL, &tmp);
if (ACPI_FAILURE(status))
- tz->passive.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 0;
else
- tz->passive.tc2 = tmp;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].tc2 = tmp;
status = acpi_evaluate_integer(tz->device->handle,
"_TSP", NULL, &tmp);
if (ACPI_FAILURE(status))
- tz->passive.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 0;
else
- tz->passive.tsp = tmp;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].tsp = tmp;
}
}
}
- if ((flag & ACPI_TRIPS_DEVICES) && tz->passive.flags.valid) {
+ if ((flag & ACPI_TRIPS_DEVICES) && tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid) {
memset(&devices, 0, sizeof(struct acpi_handle_list));
status = acpi_evaluate_reference(tz->device->handle, "_PSL",
NULL, &devices);
if (ACPI_FAILURE(status)) {
acpi_handle_info(tz->device->handle,
"Invalid passive threshold\n");
- tz->passive.flags.valid = 0;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 0;
} else {
- tz->passive.flags.valid = 1;
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid = 1;
}

- if (memcmp(&tz->passive.devices, &devices,
+ if (memcmp(&tz->trips[ACPI_THERMAL_TRIP_PASSIVE].devices, &devices,
sizeof(struct acpi_handle_list))) {
- memcpy(&tz->passive.devices, &devices,
+ memcpy(&tz->trips[ACPI_THERMAL_TRIP_PASSIVE].devices, &devices,
sizeof(struct acpi_handle_list));
ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
}
}
if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
- if (valid != tz->passive.flags.valid)
+ if (valid != tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid)
ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state");
}

@@ -460,9 +467,9 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
if (ret)
return ret;

- valid = tz->critical.flags.valid |
- tz->hot.flags.valid |
- tz->passive.flags.valid;
+ valid = tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid |
+ tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid |
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid;

for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
valid |= tz->active[i].flags.valid;
@@ -502,7 +509,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal,
if (!tz || trip < 0)
return -EINVAL;

- if (tz->critical.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid) {
if (!trip) {
*type = THERMAL_TRIP_CRITICAL;
return 0;
@@ -510,7 +517,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal,
trip--;
}

- if (tz->hot.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid) {
if (!trip) {
*type = THERMAL_TRIP_HOT;
return 0;
@@ -518,7 +525,7 @@ static int thermal_get_trip_type(struct thermal_zone_device *thermal,
trip--;
}

- if (tz->passive.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid) {
if (!trip) {
*type = THERMAL_TRIP_PASSIVE;
return 0;
@@ -546,30 +553,30 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
if (!tz || trip < 0)
return -EINVAL;

- if (tz->critical.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid) {
if (!trip) {
*temp = deci_kelvin_to_millicelsius_with_offset(
- tz->critical.temperature,
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature,
tz->kelvin_offset);
return 0;
}
trip--;
}

- if (tz->hot.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid) {
if (!trip) {
*temp = deci_kelvin_to_millicelsius_with_offset(
- tz->hot.temperature,
+ tz->trips[ACPI_THERMAL_TRIP_HOT].temperature,
tz->kelvin_offset);
return 0;
}
trip--;
}

- if (tz->passive.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid) {
if (!trip) {
*temp = deci_kelvin_to_millicelsius_with_offset(
- tz->passive.temperature,
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].temperature,
tz->kelvin_offset);
return 0;
}
@@ -595,9 +602,9 @@ static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
{
struct acpi_thermal *tz = thermal->devdata;

- if (tz->critical.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid) {
*temperature = deci_kelvin_to_millicelsius_with_offset(
- tz->critical.temperature,
+ tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature,
tz->kelvin_offset);
return 0;
}
@@ -635,8 +642,9 @@ static int thermal_get_trend(struct thermal_zone_device *thermal,
* tz->temperature has already been updated by generic thermal layer,
* before this callback being invoked
*/
- i = (tz->passive.tc1 * (tz->temperature - tz->last_temperature)) +
- (tz->passive.tc2 * (tz->temperature - tz->passive.temperature));
+ i = (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].tc1 * (tz->temperature - tz->last_temperature)) +
+ (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].tc2 *
+ (tz->temperature - tz->trips[ACPI_THERMAL_TRIP_PASSIVE].temperature));

if (i > 0)
*trend = THERMAL_TREND_RAISING;
@@ -681,16 +689,16 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
int trip = -1;
int result = 0;

- if (tz->critical.flags.valid)
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid)
trip++;

- if (tz->hot.flags.valid)
+ if (tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid)
trip++;

- if (tz->passive.flags.valid) {
+ if (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid) {
trip++;
- for (i = 0; i < tz->passive.devices.count; i++) {
- handle = tz->passive.devices.handles[i];
+ for (i = 0; i < tz->trips[ACPI_THERMAL_TRIP_PASSIVE].devices.count; i++) {
+ handle = tz->trips[ACPI_THERMAL_TRIP_PASSIVE].devices.handles[i];
dev = acpi_fetch_acpi_dev(handle);
if (dev != device)
continue;
@@ -774,23 +782,23 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
acpi_status status;
int i;

- if (tz->critical.flags.valid)
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid)
trips++;

- if (tz->hot.flags.valid)
+ if (tz->trips[ACPI_THERMAL_TRIP_HOT].flags.valid)
trips++;

- if (tz->passive.flags.valid)
+ if (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid)
trips++;

for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && tz->active[i].flags.valid;
i++, trips++);

- if (tz->passive.flags.valid)
+ if (tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid)
tz->thermal_zone =
thermal_zone_device_register("acpitz", trips, 0, tz,
&acpi_thermal_zone_ops, NULL,
- tz->passive.tsp*100,
+ tz->trips[ACPI_THERMAL_TRIP_PASSIVE].tsp*100,
tz->polling_frequency*100);
else
tz->thermal_zone =
@@ -966,8 +974,8 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
*/
static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
{
- if (tz->critical.flags.valid &&
- (tz->critical.temperature % 5) == 1)
+ if (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].flags.valid &&
+ (tz->trips[ACPI_THERMAL_TRIP_CRITICAL].temperature % 5) == 1)
tz->kelvin_offset = 273100;
else
tz->kelvin_offset = 273200;
--
2.34.1