| Message ID | 1554989411-23666-1-git-send-email-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | hwmon: pwm-fan: Add RPM support | expand |
On 4/11/19 6:30 AM, Stefan Wahren wrote: > Contrary to the gpio-fan the pwm-fan driver isn't easy to setup > with pwmconfig/fancontrol because of the missing hwmon sysfs entry > for actual revolutions per minute. This series adds this feature. > Series applied to hwmon-next. Thanks, Guenter > Changes in V5: > - address Guenter's and Robin's comments: > - use of_property_read_u32 to get pulses-per-revolution > - call platform_get_irq ealier to avoid glitches on the regulator > - simplify pwm_fan_attrs_visible > > Changes in V4: > - remove copy & paste artifact in dt-binding example > - switch to u64 for rpm calculation > - drop overflow handling and init atomic > - handle 0 not as valid irq > - reduce range of pulses_per_revolution > - handle probe defer of platform_get_irq > - delete timer properly in bail-out path > > Changes in V3: > - rename property interrupt-ratio to pulses-per-revolution > to avoid confusion with interrupt binding > - handle error case pulses-per-revolution = 0 > - bail out properly in case we are unable to request the irq > > Changes in V2: > - address Guenter's comments: > - improve description of interrupts > - use atomic_t to avoid races of the pulse counter > - measure sample time to make rpm more reliable under load > - make sysfs entry fan1_input conditional > - add dt-property to define interrupts per fan revolution > - example for fan with RPM support > > Stefan Wahren (3): > dt-bindings: hwmon: Add tachometer interrupt to pwm-fan > Documentation: pwm-fan: Add description for RPM support > hwmon: pwm-fan: Add RPM support via external interrupt > > .../devicetree/bindings/hwmon/pwm-fan.txt | 21 +++- > Documentation/hwmon/pwm-fan | 3 + > drivers/hwmon/pwm-fan.c | 107 ++++++++++++++++++++- > 3 files changed, 126 insertions(+), 5 deletions(-) >