[PATCH 3/6] acpi: thermal: display forced passive trip points in proc

From: Frans Pop
Date: Wed Aug 26 2009 - 12:18:27 EST

Users can force passive cooling for a thermal zone that does not
have _PSV defined in ACPI by setting the passive attribute in sysfs.
It's useful to display such trip points in /proc/acpi/thermal_zone.

.../TZ1/cooling_mode:<setting not supported>
.../TZ1/polling_frequency:polling frequency: 10 seconds
.../TZ1/state:state: ok
.../TZ1/temperature:temperature: 53 C
.../TZ1/trip_points:critical (S5): 110 C
.../TZ1/trip_points:passive (forced): 95 C

And if not set (passive is 0):
.../TZ1/trip_points:passive (forced):<not set>

Signed-off-by: Frans Pop <elendil@xxxxxxxxx>
Cc: Zhang Rui <rui.zhang@xxxxxxxxx>
Cc: Matthew Garrett <mjg59@xxxxxxxxxxxxx>

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 564ea14..a4e507b 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -1050,6 +1050,13 @@ static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
seq_puts(seq, "\n");
+ } else {
+ seq_printf(seq, "passive (forced):");
+ if (tz->thermal_zone->forced_passive)
+ seq_printf(seq, " %i C\n",
+ tz->thermal_zone->forced_passive / 1000);
+ else
+ seq_printf(seq, "<not set>\n");

for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
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