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The PWM framework has clarified the concept of reference PWM config (the
platform dependent config retrieved from the DT or the PWM lookup table)
and real PWM state.
Use pwm_get_args() when the PWM user wants to retrieve this reference
config and not the current state.
This is part of the rework allowing the PWM framework to support
hardware readout and expose real PWM state even when the PWM has just
been requested (before the user calls pwm_config/enable/disable()).
Signed-off-by: Boris Brezillon <[email protected]>
Acked-by: Kamil Debski <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.
Signed-off-by: Luis de Bethencourt <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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pwm_config() must be called with a duty cycle of 0 prior to calling
pwm_disable() to ensure that the pwm signal is set to low.
Reported-by: Markus Reichl <[email protected]>
Tested-by: Markus Reichl <[email protected]>
Reviewed-by: Lukasz Majewski <[email protected]>
Reviewed-by: Sjoerd Simons <[email protected]>
Signed-off-by: Anand Moon <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)
Signed-off-by: Fabian Frederick <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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Address the following sparse warnings.
drivers/hwmon/pwm-fan.c:176:5: warning:
symbol 'pwm_fan_of_get_cooling_data' was not declared. Should it be static?
drivers/hwmon/pwm-fan.c:176:5: warning:
no previous prototype for 'pwm_fan_of_get_cooling_data'
pwm_fan_of_get_cooling_data is only used in the pwm-fan driver and thus should
be declared static.
Cc: Lukasz Majewski <[email protected]>
Acked-by: Lukasz Majewski <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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The PWM FAN device can now be used as a thermal cooling device.
Signed-off-by: Lukasz Majewski <[email protected]>
Acked-by: Eduardo Valentin <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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This patch provides code for reading PWM FAN configuration data via
device tree. The pwm-fan can work with full speed when configuration
is not provided. However, errors are propagated when wrong DT bindings
are found.
Additionally the struct pwm_fan_ctx has been extended.
Signed-off-by: Lukasz Majewski <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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It was necessary to decouple code handling writing to sysfs from the one
responsible for setting PWM of the fan.
Due to that, new __set_pwm() method was extracted, which is responsible for
only setting new PWM duty cycle.
Signed-off-by: Lukasz Majewski <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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The state of a PWM output is not clearly defined after resume. Some PWM
drivers do not restore the duty cycle upon resume, thus it is necessary to
manually restore the correct value.
Signed-off-by: Kamil Debski <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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The dev_set_drvdata() call is equivalent to the platform_set_drvdata() call in
next line.
Signed-off-by: Axel Lin <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
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The pwm-fan driver enables control of fans connected to PWM lines.
This driver uses the PWM framework, so it is compatible with all
PWM devices that provide drivers through the PWM framework.
Signed-off-by: Kamil Debski <[email protected]>
Reviewed-by: Varka Bhadram <[email protected]>
Reviewed-by: Tobias Klauser <[email protected]>
[Guenter Roeck: Last argument to devm_of_pwm_get is pointer, use NULL]
Signed-off-by: Guenter Roeck <[email protected]>
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