pwm: stm32: Split breakinput apply routine to ease PM support

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Split breakinput routine that configures STM32 timers 'break' safety
feature upon probe, into two routines:
- stm32_pwm_apply_breakinputs() sets all the break inputs into registers.
- stm32_pwm_probe_breakinputs() probes the device tree break input settings
  before calling stm32_pwm_apply_breakinputs()

This is a precursor patch to ease PM support. Registers content may get
lost during low power. So, break input settings applied upon probe need
to be restored upon resume (e.g. by calling stm32_pwm_apply_breakinputs()).

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 14:53:52 +02:00 • committed by Thierry Reding

parent 4205e35628

commit 0f9d2ecba8

1 changed files with 31 additions and 19 deletions

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drivers/pwm/pwm-stm32.c

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