HSI2C_AUTO_MODE
writel(i2c_conf | HSI2C_AUTO_MODE, i2c->regs + HSI2C_CONF);
val = readl(i2c->regs + HSI2C_CONF) & ~HSI2C_AUTO_MODE;
val = readl(i2c->regs + HSI2C_CONF) | HSI2C_AUTO_MODE;