HASH_CR
stm32_hash_write(hdev, HASH_CR, *preg);
stm32_hash_write(hdev, HASH_CR, reg);
*preg++ = stm32_hash_read(hdev, HASH_CR);
stm32_hash_write(hdev, HASH_CR, reg);
reg = stm32_hash_read(hdev, HASH_CR);
stm32_hash_write(hdev, HASH_CR, reg);
reg = stm32_hash_read(hdev, HASH_CR);
stm32_hash_write(hdev, HASH_CR, reg);