Hi Chunyan, [...] > > When IIC-slaves supporting different frequencies use the same IIC > > %s/I2C/IIC [...] > > #define SPRD_I2C_PM_TIMEOUT 1000 > > /* timeout (ms) for transfer message */ > > #define I2C_XFER_TIMEOUT 1000 > > - > > +/* dynamic modify clk_freq flag */ > > +#define I2C_3M4_FLAG 0x0100 > > #define <space> I2C_3M4_FLAG <tab> 0x0100 > > > +#define I2C_1M_FLAG 0x0080 > > +#define I2C_400K_FLAG 0x0040 > > + > > +#define I2C_FREQ_400K 400000 > > +#define I2C_FREQ_1M 1000000 > > +#define I2C_FREQ_3_4M 3400000 > > ditto why should he use IIC instead of I2C. The file's defines start with I2C, for consistency he should use the same prefix. Andi