linux-kernel - Re: [PATCH v12 00/11] Add support for Hikey 970 PCIe

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Date:   Tue, 5 Oct 2021 11:24:48 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Krzysztof Wilczyński 
        <kw@...ux.com>, Binghui Wang <wangbinghui@...ilicon.com>,
        Rob Herring <robh@...nel.org>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-phy@...ts.infradead.org
Subject: Re: [PATCH v12 00/11] Add support for Hikey 970 PCIe

Hi Bjorn,

Em Tue, 28 Sep 2021 09:34:10 +0200
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> escreveu:

> The pcie-kirin PCIe driver contains internally a PHY interface for
> Kirin 960, but it misses support for Kirin 970.
> 
> Patch1 contains a PHY for Kirin 970 PCIe.
> 
> The remaining patches add support for Kirin 970 at the pcie-kirin driver, and
> add the needed logic to compile it as module and to allow to dynamically
> remove the driver in runtime.
> 
> Tested on HiKey970:
> 
>   # lspci -D -PP
>   0000:00:00.0 PCI bridge: Huawei Technologies Co., Ltd. Device 3670 (rev 01)
>   0000:00:00.0/01:00.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   0000:00:00.0/01:00.0/02:01.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   0000:00:00.0/01:00.0/02:04.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   0000:00:00.0/01:00.0/02:05.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   0000:00:00.0/01:00.0/02:07.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   0000:00:00.0/01:00.0/02:09.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   0000:00:00.0/01:00.0/02:01.0/03:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a809
>   0000:00:00.0/01:00.0/02:07.0/06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
> 
> Tested on HiKey960:
> 
>   # lspci -D 
>   0000:00:00.0 PCI bridge: Huawei Technologies Co., Ltd. Device 3660 (rev 01)
> 
> ---
> 
> v12:
>   - Change a comment at patch 1 to not use c99 style.
> 
> v11:
>   - patch 5 changed to use the right PCIe topology
>   - all other patches are identical to v10.
> 
> v10:
>   - patch 1: dropped magic numbers from PHY driver
>   - patch 5: allow pcie child nodes without reset-gpios
>   - all other patches are identical to v9.
> 
> v9:
>   - Did some cleanups at patches 1 and 5
> 

As the DT changes needed by HiKey 970 PCIe support are already upstream:

	commit cfcf126fc6795e843d090d98754391ece55e8b0c
	Author:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
	AuthorDate: Wed Aug 4 09:18:56 2021 +0200
	Commit:     Rob Herring <robh@...nel.org>
	CommitDate: Mon Aug 16 16:00:52 2021 -0500

	    dt-bindings: PCI: kirin: Add support for Kirin970
	    
	    Add a new compatible, plus the new bindings needed by
	    HiKey970 board.
    
	    Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
	    Link: https://lore.kernel.org/r/875a4571e253040d3885ee1f37467b0bade7361b.1628061310.git.mchehab+huawei@kernel.org
	    Signed-off-by: Rob Herring <robh@...nel.org>

> 
> Mauro Carvalho Chehab (11):
>   phy: HiSilicon: Add driver for Kirin 970 PCIe PHY

And the PHY patch was already accepted and merged at today's
linux-next:

	commit 73075011ffff876de8516a1e583dc41869293da9
	Author:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
	AuthorDate: Tue Sep 28 09:34:11 2021 +0200
	Commit:     Vinod Koul <vkoul@...nel.org>
	CommitDate: Fri Oct 1 13:42:18 2021 +0530

	    phy: HiSilicon: Add driver for Kirin 970 PCIe PHY
    
	    The Kirin 970 PHY is somewhat similar to the Kirin 960, but it
	    does a lot more. Add the needed bits for PCIe to start working on
	    HiKey 970 boards.
    
	    Co-developed-by: Manivannan Sadhasivam <mani@...nel.org>
	    Signed-off-by: Manivannan Sadhasivam <mani@...nel.org>
	    Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
	    Link: https://lore.kernel.org/r/b7a4ff41b57d861b003f1a00cae81f3d226fbe18.1632814194.git.mchehab+huawei@kernel.org
	    Signed-off-by: Vinod Koul <vkoul@...nel.org>

>   PCI: kirin: Reorganize the PHY logic inside the driver
>   PCI: kirin: Add support for a PHY layer
>   PCI: kirin: Use regmap for APB registers
>   PCI: kirin: Add support for bridge slot DT schema
>   PCI: kirin: Add Kirin 970 compatible
>   PCI: kirin: Add MODULE_* macros
>   PCI: kirin: Allow building it as a module
>   PCI: kirin: Add power_off support for Kirin 960 PHY
>   PCI: kirin: fix poweroff sequence
>   PCI: kirin: Allow removing the driver

I guess everything is already satisfying the review feedbacks.
If so, could you please merge the PCI ones?

> 
>  drivers/pci/controller/dwc/Kconfig      |   2 +-
>  drivers/pci/controller/dwc/pcie-kirin.c | 644 +++++++++++++-----
>  drivers/phy/hisilicon/Kconfig           |  10 +
>  drivers/phy/hisilicon/Makefile          |   1 +
>  drivers/phy/hisilicon/phy-hi3670-pcie.c | 845 ++++++++++++++++++++++++
>  5 files changed, 1354 insertions(+), 148 deletions(-)
>  create mode 100644 drivers/phy/hisilicon/phy-hi3670-pcie.c

Thanks,
Mauro