STM32_MDMA_CTCR_SSIZE_MASK
#define STM32_MDMA_CTCR_SSIZE(n) FIELD_PREP(STM32_MDMA_CTCR_SSIZE_MASK, (n))
ctcr &= ~STM32_MDMA_CTCR_SSIZE_MASK |
ctcr &= ~STM32_MDMA_CTCR_SSIZE_MASK;
STM32_MDMA_CTCR_SSIZE_MASK | STM32_MDMA_CTCR_DINC_MASK |