Fourth version of a hwmon driver to monitor the fan's rpm on Microsoft
Surface devices, originally submitted in [1], v2 at [2], v3 at [3]. Changes
since v3 are two minor code changes based on feedback.
Changes in v4:
- Return 0 from surface_fan_hwmon_read instead of ret.
- Use PTR_ERR_OR_ZERO in probe instead of if statement.
Changes in v3:
- Removed type and attr checks in read and is_visible.
- Removed assigning sdev to ssam_device drvdata.
- Propagate return from __ssam_fan_rpm_get.
- Renamed hwmon chip name from 'fan' to 'surface_fan'.
- Removed unnecessary platform_device header.
Changes in v2:
- Removed all unsupported sysfs attributes from the hwmon driver, leaving
the fan input as the only supported attribute.
[1] https://lore.kernel.org/linux-hwmon/20231220234415.5219-1-ivor@xxxxxxxxxxxx/T/
[2] https://lore.kernel.org/linux-hwmon/20231228003444.5580-1-ivor@xxxxxxxxxxxx/T/
[3] https://lore.kernel.org/linux-hwmon/20240113183306.9566-1-ivor@xxxxxxxxxxxx/T/
Ivor Wanders (2):
platform/surface: aggregator_registry: add entry for fan speed
hwmon: add fan speed monitoring driver for Surface devices
Documentation/hwmon/index.rst | 1 +
Documentation/hwmon/surface_fan.rst | 25 +++++
MAINTAINERS | 8 ++
drivers/hwmon/Kconfig | 13 +++
drivers/hwmon/Makefile | 1 +
drivers/hwmon/surface_fan.c | 91 +++++++++++++++++++
.../surface/surface_aggregator_registry.c | 7 ++
7 files changed, 146 insertions(+)
create mode 100644 Documentation/hwmon/surface_fan.rst
create mode 100644 drivers/hwmon/surface_fan.c
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2.17.1
