pwm: stm32: Add power management support

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Add suspend/resume PM sleep ops. When going to low power, enforce the PWM
channel isn't active. Let the PWM consumers disable it during their own
suspend sequence, see [1]. So, perform a check here, and handle the
pinctrl states. Also restore the break inputs upon resume, as registers
content may be lost when going to low power mode.

[1] https://lkml.org/lkml/2019/2/5/770

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

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Fabrice Gasnier 2019-10-04 14:53:53 +02:00 • committed by Thierry Reding

parent 0f9d2ecba8

commit 2d3aa06b5d

1 changed files with 38 additions and 0 deletions

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drivers/pwm/pwm-stm32.c

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