STM32_LPTIM_CC2P
state->polarity = FIELD_GET(STM32_LPTIM_CC2P, ccmr1);
(polarity != FIELD_GET(STM32_LPTIM_CC2P, ccmr1));
mask = STM32_LPTIM_CC2SEL | STM32_LPTIM_CC2E | STM32_LPTIM_CC2P;
val = FIELD_PREP(STM32_LPTIM_CC2P, polarity);