RE: [PATCHv9 08/12] PCI: mobiveil: Add 8-bit and 16-bit CSR register accessors

Z.q. Hou
2020-02-06T13:45:40Z

Hi Andrew,

Thanks a lot for your comments!

> -----Original Message-----
> From: Andrew Murray <andrew.murray@arm.com>
> Sent: 2020年1月13日 19:32
> To: Z.q. Hou <zhiqiang.hou@nxp.com>
> Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> bhelgaas@google.com; robh+dt@kernel.org; arnd@arndb.de;
> mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> shawnguo@kernel.org; m.karthikeyan@mobiveil.co.in; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com;
> catalin.marinas@arm.com; will.deacon@arm.com; Mingkai Hu
> <mingkai.hu@nxp.com>; M.h. Lian <minghuan.lian@nxp.com>; Xiaowei Bao
> <xiaowei.bao@nxp.com>
> Subject: Re: [PATCHv9 08/12] PCI: mobiveil: Add 8-bit and 16-bit CSR register
> accessors
>
> On Wed, Nov 20, 2019 at 03:46:10AM +0000, Z.q. Hou wrote:
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > There are some 8-bit and 16-bit registers in PCIe configuration space,
> > so add these accessors accordingly.
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> > Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
> > ---
> > V9:
> > - No change
> >
> > .../pci/controller/mobiveil/pcie-mobiveil.h | 23
> +++++++++++++++++++
> > 1 file changed, 23 insertions(+)
> >
> > diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > index 37116c2a19fe..750a7fd95bc1 100644
> > --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > @@ -182,10 +182,33 @@ static inline u32 mobiveil_csr_readl(struct
> mobiveil_pcie *pcie, u32 off)
> > return mobiveil_csr_read(pcie, off, 0x4); }
> >
> > +static inline u32 mobiveil_csr_readw(struct mobiveil_pcie *pcie, u32
> > +off) {
> > + return mobiveil_csr_read(pcie, off, 0x2); }
> > +
> > +static inline u32 mobiveil_csr_readb(struct mobiveil_pcie *pcie, u32
> > +off) {
> > + return mobiveil_csr_read(pcie, off, 0x1); }
>
> Do you think the above two return types should reflect the size of the access?

Will change in v10.

Thanks,
Zhiqiang

>
> Thanks,
>
> Andrew Murray
>
> > +
> > +
> > static inline void mobiveil_csr_writel(struct mobiveil_pcie *pcie, u32 val,
> > u32 off)
> > {
> > mobiveil_csr_write(pcie, val, off, 0x4); }
> >
> > +static inline void mobiveil_csr_writew(struct mobiveil_pcie *pcie, u32 val,
> > + u32 off)
> > +{
> > + mobiveil_csr_write(pcie, val, off, 0x2); }
> > +
> > +static inline void mobiveil_csr_writeb(struct mobiveil_pcie *pcie, u32 val,
> > + u32 off)
> > +{
> > + mobiveil_csr_write(pcie, val, off, 0x1); }
> > +
> > #endif /* _PCIE_MOBIVEIL_H */
> > --
> > 2.17.1
> >