[PATCH v2 6/8] pci: Add DW PCIe controller support for iMX8MP SoC

[Tim Harvey]

On Tue, Feb 27, 2024 at 3:19 PM Adam Ford <aford173 at gmail.com> wrote:
>
> On Mon, Feb 26, 2024 at 2:05 AM Sumit Garg <sumit.garg at linaro.org> wrote:
> >
> > pcie_imx doesn't seem to share any useful code for iMX8 SoC and it is
> > tied to quite old port of pcie_designware driver from Linux which
> > suffices only iMX6 specific needs.
> >
> > But currently we have the common DWC specific bits which alligns pretty
> > well with DW PCIe controller on iMX8MP SoC. So lets reuse those common
> > bits instead as a new driver for iMX8 SoCs. It should be fairly easy to
> > add support for other iMX8 variants to this driver.
> >
> > iMX8MP SoC also comes up with standalone PCIe PHY support, so hence we
> > can reuse the generic PHY infrastructure to power on PCIe PHY.
> >
> > Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
> > ---
> >  drivers/pci/Kconfig       |   8 +
> >  drivers/pci/Makefile      |   1 +
> >  drivers/pci/pcie_dw_imx.c | 314 ++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 323 insertions(+)
> >  create mode 100644 drivers/pci/pcie_dw_imx.c
> >
> > diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> > index 463ec47eb92d..7edbf35004a9 100644
> > --- a/drivers/pci/Kconfig
> > +++ b/drivers/pci/Kconfig
> > @@ -413,4 +413,12 @@ config PCIE_STARFIVE_JH7110
> >           Say Y here if you want to enable PLDA XpressRich PCIe controller
> >           support on StarFive JH7110 SoC.
> >
> > +config PCIE_DW_IMX
> > +       bool "i.MX DW PCIe controller support"
> > +       depends on ARCH_IMX8M
>
> I think this also needs to depend on REGMAP to prevent build errors.
>

Sumit,

both REGMAP and SYSCON are needed to build.

Best Regards,

Tim