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When atmel_pwm_config() calculates and then sets the prescaler, it is
overwriting the channel's CMR register so we are losing the CPOL
configuration.
As atmel_pwm_config() is always called before enabling a channel,
inverting the polarity doesn't work.
Fix that by reading CMR first and only overwriting the prescaler bits.
Signed-off-by: Alexandre Belloni <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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When the PWM controller is registered successfully, the clock can not
unprepare, so fix it.
Signed-off-by: Bo Shen <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Add a PWM framework driver for the PWM controller found on Atmel SoCs.
Signed-off-by: Bo Shen <[email protected]>
Acked-by: Alexandre Belloni <[email protected]>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
[thierry.reding: coding style and other minor cleanups]
Signed-off-by: Thierry Reding <[email protected]>
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