On Thu, Apr 19, 2018 at 12:33:50PM +0000, Meenakshi Aggarwal wrote:
> > > +EFI_STATUS
> > > +EFIAPI
> > > +LibSetTime (
> > > + IN EFI_TIME *Time
> > > + )
> > > +{
> > > + UINT8 Buffer[8];
> > > + UINT8 Index;
> > > + EFI_STATUS Status;
> > > + RTC_I2C_REQUEST Req;
> > > + UINT8 RtcRegAddr;
> > > +
> > > + Index = 0;
> > > + Status = EFI_SUCCESS;
> > > + RtcRegAddr = PCF2129_CTRL1_REG_ADDR;
> > > +
> > > + if (mI2cMaster == NULL) {
> > > + return EFI_DEVICE_ERROR;
> > > + }
> > > +
> > > + // start register address
> > > + Buffer[Index++] = PCF2129_SEC_REG_ADDR;
> > > +
> > > + // hours, minutes and seconds
> > > + Buffer[Index++] = DecimalToBcd8 (Time->Second);
> > > + Buffer[Index++] = DecimalToBcd8 (Time->Minute);
> > > + Buffer[Index++] = DecimalToBcd8 (Time->Hour);
> > > + Buffer[Index++] = DecimalToBcd8 (Time->Day);
> > > + Buffer[Index++] = EfiTimeToWday (Time) & 0x07;
> >
> > Why mask at the call site?
> >
> In GetTime function, data is been read from RTC device so we need to
> mask the unnecessary bits
> [as described in RTC registers] while
> In SetTime, we are receiving the appropriate buffer so no need to
> mask the data.
But EfiTimeToWday returns an integer in the range 0-6:
return (EpochDays + 4) % 7;
Anding the result of that with 0x7 has no effect.
/
Leif
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