diff options
| author | Fabio Estevam <festevam@denx.de> | 2023-11-29 15:43:30 +0300 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2024-01-02 11:33:18 +0300 |
| commit | 62e79e38b257a59f1e3d8aff801ae8590e2e45b4 (patch) | |
| tree | c71c2f042177c9716680a59d59340f63cf037c06 /drivers/thermal | |
| parent | 79fa723ba84c2b1b3124c72df8a3b07b851a5477 (diff) | |
| download | linux-62e79e38b257a59f1e3d8aff801ae8590e2e45b4.tar.xz | |
thermal/thermal_of: Allow rebooting after critical temp
Currently, the default mechanism is to trigger a shutdown after the
critical temperature is reached.
In some embedded cases, such behavior does not suit well, as the board may
be unattended in the field and rebooting may be a better approach.
The bootloader may also check the temperature and only allow the boot to
proceed when the temperature is below a certain threshold.
Introduce support for allowing a reboot to be triggered after the
critical temperature is reached.
If the "critical-action" devicetree property is not found, fall back to
the shutdown action to preserve the existing default behavior.
If a custom ops->critical exists, then it takes preference over
critical-actions.
Tested on a i.MX8MM board with the following devicetree changes:
thermal-zones {
cpu-thermal {
critical-action = "reboot";
};
};
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20231129124330.519423-4-festevam@gmail.com
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_of.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index 1e0655b63259..4d6c22e0ed85 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -475,6 +475,7 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * struct thermal_zone_params tzp = {}; struct thermal_zone_device_ops *of_ops; struct device_node *np; + const char *action; int delay, pdelay; int ntrips, mask; int ret; @@ -511,6 +512,11 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * mask = GENMASK_ULL((ntrips) - 1, 0); + ret = of_property_read_string(np, "critical-action", &action); + if (!ret) + if (!of_ops->critical && !strcasecmp(action, "reboot")) + of_ops->critical = thermal_zone_device_critical_reboot; + tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips, mask, data, of_ops, &tzp, pdelay, delay); |