[0/2] thermal: thermal_of: pass-through change_mode & implement for tsens

Message

Benjamin Li March 16, 2022, 9:09 p.m. UTC

Plumb through the change_mode callback from thermal core into thermal_of,
and implement change_mode for the Qualcomm tsens driver.

Supersedes "[PATCH v3] drivers: thermal: tsens: respect thermal_device_mode
in threshold irq reporting". Changelog for that patchset:

Changes in v3:
- Upgraded logging to dev_info_ratelimited and revised log message.
- Remove unrelated hunk.

Some drivers that support thermal zone disabling implement a set_mode
operation and simply disable the sensor or the relevant IRQ(s), so they
actually don't log anything when zones are disabled. These drivers are
imx_thermal.c, intel_quark_dts_thermal.c, and int3400_thermal.c.

For tsens.c, implementing a change_mode would require migrating the driver
from devm_thermal_zone_of_sensor_register to thermal_zone_device_register
(or updating thermal_of.c to add a change_mode operation in thermal_zone_
of_device_ops).

stm_thermal.c seems to use this patch's model of not disabling IRQs when
the zone is disabled (they still perform the thermal_zone_device_update
upon IRQ, but return -EAGAIN from their get_temp).

Changes in v2:
- Reordered sentences in first part of commit message to make sense.

Benjamin Li (2):
  thermal: thermal_of: add pass-through change_mode to ops struct
  drivers: thermal: tsens: implement change_mode to disable sensor IRQs

 drivers/thermal/qcom/tsens.c | 43 ++++++++++++++++++++++++++++++++++--
 drivers/thermal/qcom/tsens.h |  4 ++++
 drivers/thermal/thermal_of.c | 14 ++++++++++++
 include/linux/thermal.h      |  2 ++
 4 files changed, 61 insertions(+), 2 deletions(-)