linux-kernel - Re: [PATCH V3 0/4] PCI: exynos: use the PHY generic framework

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Date:   Wed, 15 Feb 2017 15:11:20 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Jaehoon Chung <jh80.chung@...sung.com>
Cc:     linux-pci@...r.kernel.org, bhelgaas@...gle.com, krzk@...nel.org,
        linux-kernel@...r.kernel.org, jingoohan1@...il.com,
        javier@....samsung.com, kgene@...nel.org,
        linux-samsung-soc@...r.kernel.org, cpgs@...sung.com,
        niyas.ahmed@...sung.com, alim.akhtar@...sung.com,
        pankaj.dubey@...sung.com, kishon@...com,
        devicetree@...r.kernel.org, mark.rutland@....com,
        vivek.gautam@...eaurora.org, robh+dt@...nel.org
Subject: Re: [PATCH V3 0/4] PCI: exynos: use the PHY generic framework

On Mon, Feb 13, 2017 at 05:26:09PM +0900, Jaehoon Chung wrote:
> This patcheset is for using PHY generic framework.
> Current pci-exyns doesn't use the phy framework since there haven't been on
> PHY subsystem when Exynos5440 had bean upstreamed.
> It's making a difficult to upstream the other Exynos variants because of different
> PHY registers.
> 
> This patcheset has the below modifications:
> 1) Introduces the phy-exynos-pcie
> 2) Handles PHY register from PHY framework for pci-exynos
> 3) Modifies the dt-binding of pci-exynos
> 4) Maintains the backward compatibility
> 
> Changelog on V3:
> - Drops "ARM: dts: exynos5440: support the phy-pcie node of pcie"
>   : Will send this patch after applying this patchset.
> - Fixes typo
> - Based on latest PCI git repository (host-exynos branch)
> - Changes commit message
> - Removes the dependency
> 
> Changelog on V2:
> - Keep current codes for backward compatibility
> - Fixes some typos
> - Split the patches for removing the dependency
> - Removes the unnecessary codes
> - Change the patch's sequence
> - Based on latest PCI git repository.(next branch)
> 
> Jaehoon Chung (4):
>   Documetation: samsung-phy: add the exynos-pcie-phy binding
>   phy: phy-exynos-pcie: Add support for Exynos PCIe phy
>   Documetation: binding: modify the exynos5440 pcie binding
>   PCI: exynos: support the using PHY generic framework
> 
>  .../bindings/pci/samsung,exynos5440-pcie.txt       |  29 +++
>  .../devicetree/bindings/phy/samsung-phy.txt        |  17 ++
>  drivers/pci/host/pci-exynos.c                      |  54 +++-
>  drivers/phy/Kconfig                                |   8 +
>  drivers/phy/Makefile                               |   1 +
>  drivers/phy/phy-exynos-pcie.c                      | 285 +++++++++++++++++++++
>  6 files changed, 390 insertions(+), 4 deletions(-)
>  create mode 100644 drivers/phy/phy-exynos-pcie.c

I made the updates Vivek suggested and provisionally added these to my
pci/host-exynos branch to get some build testing.

Kishon, I guess it probably makes more sense for me to apply this
because even though the drivers/pci changes are small, I think they
depend on other pci-exynos.c changes that are on my branch but not in
Linus' tree yet.

Bjorn