linux-kernel - Re: [PATCH v5 0/6] Add SiFive FU740 PCIe host controller driver support

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Message-ID: <CAHCEeh+cMrEnHNG3W3ZNzdgT-m7BMorDawF6D8qkFYGg=RJMOw@mail.gmail.com>
Date:   Tue, 4 May 2021 15:20:00 +0800
From:   Greentime Hu <greentime.hu@...ive.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>, hes@...ive.com,
        Erik Danie <erik.danie@...ive.com>,
        Zong Li <zong.li@...ive.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>, robh+dt@...nel.org,
        Albert Ou <aou@...s.berkeley.edu>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>, alex.dewar90@...il.com,
        khilman@...libre.com, hayashi.kunihiko@...ionext.com,
        vidyas@...dia.com, jh80.chung@...sung.com,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v5 0/6] Add SiFive FU740 PCIe host controller driver support

Bjorn Helgaas <helgaas@...nel.org> 於 2021年5月4日 週二 上午12:40寫道：
>
> On Tue, Apr 06, 2021 at 05:26:28PM +0800, Greentime Hu wrote:
> > This patchset includes SiFive FU740 PCIe host controller driver. We also
> > add pcie_aux clock and pcie_power_on_reset controller to prci driver for
> > PCIe driver to use it.
>
> I dropped this series because of the build problem I mentioned [1].
> It will not be included in v5.13 unless the build problem is fixed
> ASAP.
>
> [1] https://lore.kernel.org/r/20210428194713.GA314975@bjorn-Precision-5520
>

Hi all,

This build failed in x86_64 is because CONFIG_GPIOLIB is disabled in
the testing config.

diff --git a/drivers/pci/controller/dwc/Kconfig
b/drivers/pci/controller/dwc/Kconfig
index 0a37d21ed64e..56b66e1fed53 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -323,6 +323,7 @@ config PCIE_FU740
        depends on PCI_MSI_IRQ_DOMAIN
        depends on SOC_SIFIVE || COMPILE_TEST
        select PCIE_DW_HOST
+       select GPIOLIB
        help
          Say Y here if you want PCIe controller support for the SiFive
          FU740.

After applying this change, it can build pass.

> > This is tested with e1000e: Intel(R) PRO/1000 Network Card, AMD Radeon R5
> > 230 graphics card and SP M.2 PCIe Gen 3 SSD in SiFive Unmatched based on
> > v5.11 Linux kernel.
> >
> > Changes in v5:
> >  - Fix typo in comments
> >  - Keep comments style consistent
> >  - Refine some error handling codes
> >  - Remove unneeded header file including
> >  - Merge fu740_pcie_ltssm_enable implementation to fu740_pcie_start_link
> >
> > Changes in v4:
> >  - Fix Wunused-but-set-variable warning in prci driver
> >
> > Changes in v3:
> >  - Remove items that has been defined
> >  - Refine format of sifive,fu740-pcie.yaml
> >  - Replace perstn-gpios with the common one
> >  - Change DBI mapping space to 2GB from 4GB
> >  - Refine drivers/reset/Kconfig
> >
> > Changes in v2:
> >  - Refine codes based on reviewers' feedback
> >  - Remove define and use the common one
> >  - Replace __raw_writel with writel_relaxed
> >  - Split fu740_phyregreadwrite to write function
> >  - Use readl_poll_timeout in stead of while loop checking
> >  - Use dwc common codes
> >  - Use gpio descriptors and the gpiod_* api.
> >  - Replace devm_ioremap_resource with devm_platform_ioremap_resource_byname
> >  - Replace devm_reset_control_get with devm_reset_control_get_exclusive
> >  - Add more comments for delay and sleep
> >  - Remove "phy ? x : y" expressions
> >  - Refine code logic to remove possible infinite loop
> >  - Replace magic number with meaningful define
> >  - Remove fu740_pcie_pm_ops
> >  - Use builtin_platform_driver
> >
> > Greentime Hu (5):
> >   clk: sifive: Add pcie_aux clock in prci driver for PCIe driver
> >   clk: sifive: Use reset-simple in prci driver for PCIe driver
> >   MAINTAINERS: Add maintainers for SiFive FU740 PCIe driver
> >   dt-bindings: PCI: Add SiFive FU740 PCIe host controller
> >   riscv: dts: Add PCIe support for the SiFive FU740-C000 SoC
> >
> > Paul Walmsley (1):
> >   PCI: fu740: Add SiFive FU740 PCIe host controller driver
> >
> >  .../bindings/pci/sifive,fu740-pcie.yaml       | 113 +++++++
> >  MAINTAINERS                                   |   8 +
> >  arch/riscv/boot/dts/sifive/fu740-c000.dtsi    |  33 ++
> >  drivers/clk/sifive/Kconfig                    |   2 +
> >  drivers/clk/sifive/fu740-prci.c               |  11 +
> >  drivers/clk/sifive/fu740-prci.h               |   2 +-
> >  drivers/clk/sifive/sifive-prci.c              |  54 +++
> >  drivers/clk/sifive/sifive-prci.h              |  13 +
> >  drivers/pci/controller/dwc/Kconfig            |   9 +
> >  drivers/pci/controller/dwc/Makefile           |   1 +
> >  drivers/pci/controller/dwc/pcie-fu740.c       | 308 ++++++++++++++++++
> >  drivers/reset/Kconfig                         |   1 +
> >  include/dt-bindings/clock/sifive-fu740-prci.h |   1 +
> >  13 files changed, 555 insertions(+), 1 deletion(-)
> >  create mode 100644 Documentation/devicetree/bindings/pci/sifive,fu740-pcie.yaml
> >  create mode 100644 drivers/pci/controller/dwc/pcie-fu740.c
> >
> > --
> > 2.30.2
> >