[PATCH v4 05/12] PCI: brcmstb: Use swinit reset if available

[Jim Quinlan]

On Thu, Jul 25, 2024 at 12:39 AM Manivannan Sadhasivam
<manivannan.sadhasivam at linaro.org> wrote:
>
> On Tue, Jul 16, 2024 at 05:31:20PM -0400, Jim Quinlan wrote:
> > The 7712 SOC adds a software init reset device for the PCIe HW.
> > If found in the DT node, use it.
> >
> > Signed-off-by: Jim Quinlan <james.quinlan at broadcom.com>
> > Reviewed-by: Stanimir Varbanov <svarbanov at suse.de>
> > Reviewed-by: Florian Fainelli <florian.fainelli at broadcom.com>
> > ---
> >  drivers/pci/controller/pcie-brcmstb.c | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> >
> > diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
> > index 92816d8d215a..4dc2ff7f3167 100644
> > --- a/drivers/pci/controller/pcie-brcmstb.c
> > +++ b/drivers/pci/controller/pcie-brcmstb.c
> > @@ -266,6 +266,7 @@ struct brcm_pcie {
> >       struct reset_control    *rescal;
> >       struct reset_control    *perst_reset;
> >       struct reset_control    *bridge;
> > +     struct reset_control    *swinit;
>
> Same comment as previous patch.
>
> >       int                     num_memc;
> >       u64                     memc_size[PCIE_BRCM_MAX_MEMC];
> >       u32                     hw_rev;
> > @@ -1633,12 +1634,27 @@ static int brcm_pcie_probe(struct platform_device *pdev)
> >       if (IS_ERR(pcie->bridge))
> >               return PTR_ERR(pcie->bridge);
> >
> > +     pcie->swinit = devm_reset_control_get_optional_exclusive(&pdev->dev, "swinit");
> > +     if (IS_ERR(pcie->swinit))
> > +             return PTR_ERR(pcie->swinit);
> > +
> >       ret = clk_prepare_enable(pcie->clk);
> >       if (ret) {
> >               dev_err(&pdev->dev, "could not enable clock\n");
> >               return ret;
> >       }
> >
> > +     ret = reset_control_assert(pcie->swinit);
> > +     if (ret) {
> > +             dev_err_probe(&pdev->dev, ret, "could not assert reset 'swinit'\n");
> > +             goto clk_out;
> > +     }
>
> No delay required?

Unfortunately I am waiting for HW to answer this.

Regards,
Jim Quinlan
Broadcom STB/CM
>
> - Mani
>
> --
> மணிவண்ணன் சதாசிவம்
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