Re: [PATCH v6] SATA: OCTEON: support SATA on OCTEON platform

[Zubair Lutfullah Kakakhel]

On 03/02/16 13:41, Arnd Bergmann wrote:
> On Wednesday 03 February 2016 13:24:10 Zubair Lutfullah Kakakhel wrote:
> > Bitfields for both endians are used and handled by mips.
> > Mainly used by cavium.
> >
> > As this is a cavium driver, would it be acceptable?
> >
> > Or should I replace with the following.
> >
> >          v = cvmx_read_csr((uint64_t)base + CVMX_SATA_UCTL_SHIM_CFG);
> >          v &= ~(SATA_UCTL_ENDIAN_MODE_E_MASK << DMA_ENDIAN_MODE);
> >          v &= ~(SATA_UCTL_ENDIAN_MODE_E_MASK << CSR_ENDIAN_MODE);
> > #ifdef __BIG_ENDIAN
> >          v |= SATA_UCTL_ENDIAN_MODE_E_BIG << DMA_ENDIAN_MODE;
> >          v |= SATA_UCTL_ENDIAN_MODE_E_BIG << CSR_ENDIAN_MODE;
> > #else
> >          v |= SATA_UCTL_ENDIAN_MODE_E_LITTLE << DMA_ENDIAN_MODE;
> >          v |= SATA_UCTL_ENDIAN_MODE_E_LITTLE << CSR_ENDIAN_MODE;
> > #endif
> >          v |= 1 << DMA_READ_CMD;
> >          cvmx_write_csr((uint64_t)base + CVMX_SATA_UCTL_SHIM_CFG, v);
>
> I think something like this would be more conventional, yes. Or maybe
> define the macros so you don't have to do the shift everywhere:
>
>           v &= ~SATA_UCTL_ENDIAN_MODE_E_MASK | SATA_UCTL_ENDIAN_MODE | SATA_UCTL_DMA_READ_CMD;

Sure.

Thanks
ZubairLK

> 	Arnd