[PATCH] thermal: Default OF created trip points to writable

[Punit Agrawal <punit.agrawal@arm.com>]

When registering a thermal zone from device tree, default the trip
points to writable. By default, only the root user can change these.

This allows the trip points to be tweaked after the system has
booted.

Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
---
Hi Eduardo,

We've been using this patch internally and haven't run into any
 issues. Without these changes there is no way to change trip points
 from a running system.

Comments welcome.

Cheers,
Punit

 drivers/thermal/of-thermal.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 668fb1b..b7ad5c0 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -865,6 +865,7 @@ int __init of_parse_thermal_zones(void)
 	for_each_child_of_node(np, child) {
 		struct thermal_zone_device *zone;
 		struct thermal_zone_params *tzp;
+		int i, mask = 0;
 
 		/* Check whether child is enabled or not */
 		if (!of_device_is_available(child))
@@ -891,8 +892,11 @@ int __init of_parse_thermal_zones(void)
 		/* No hwmon because there might be hwmon drivers registering */
 		tzp->no_hwmon = true;
 
+		for (i = 0; i < tz->ntrips; i++)
+			mask |= 1 << i;
+
 		zone = thermal_zone_device_register(child->name, tz->ntrips,
-						    0, tz,
+						    mask, tz,
 						    ops, tzp,
 						    tz->passive_delay,
 						    tz->polling_delay);
-- 
2.1.4