STM32F7_I2C_CR1_PE
STM32F7_I2C_CR1_PE;
if (cr1 & STM32F7_I2C_CR1_PE)
STM32F7_I2C_CR1_PE);
writel_relaxed(backup_regs->cr1 & ~STM32F7_I2C_CR1_PE,
if (backup_regs->cr1 & STM32F7_I2C_CR1_PE)
STM32F7_I2C_CR1_PE);
STM32F7_I2C_CR1_PE);
STM32F7_I2C_CR1_PE);