STM32F7_I2C_TXDR
writel_relaxed(value, base + STM32F7_I2C_TXDR);
writel_relaxed(val, base + STM32F7_I2C_TXDR);
STM32F7_I2C_TXDR,
writeb_relaxed(*f7_msg->buf++, base + STM32F7_I2C_TXDR);