linux-kernel - Re: [PATCH] arm64: defconfig: enable PCIe controller on TI platforms

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Date:   Tue, 9 May 2023 13:38:36 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Achal Verma <a-verma1@...com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Bjorn Andersson <quic_bjorande@...cinc.com>,
        Arnd Bergmann <arnd@...db.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "N_colas F . R . A . Prado" <nfraprado@...labora.com>,
        Mark Brown <broonie@...nel.org>,
        Rafa_ Mi_ecki <rafal@...ecki.pl>, Nishanth Menon <nm@...com>,
        Milind Parab <mparab@...ence.com>,
        Swapnil Kashinath Jakhade <sjakhade@...ence.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: defconfig: enable PCIe controller on TI platforms

Hi Achal,

On 09/05/23 12:09, Krzysztof Kozlowski wrote:
> On 09/05/2023 08:34, Achal Verma wrote:
>> Enable PCIe controller and serdes drivers to enable PCIe functionality.
>> * Enable Cadence serdes phy and wrapper driver.
>> * Enable Cadence PCIe controller driver.
> 
> Why? IOW, which boards needs it?
>>
>> Signed-off-by: Achal Verma <a-verma1@...com>
>> ---
>>  arch/arm64/configs/defconfig | 15 +++++++++++----
>>  1 file changed, 11 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>> index a24609e14d50..ff187dd585c2 100644
>> --- a/arch/arm64/configs/defconfig
>> +++ b/arch/arm64/configs/defconfig
>> @@ -230,9 +230,16 @@ CONFIG_PCIE_HISI_STB=y
>>  CONFIG_PCIE_TEGRA194_HOST=m
>>  CONFIG_PCIE_VISCONTI_HOST=y
>>  CONFIG_PCIE_LAYERSCAPE_GEN4=y
>> +CONFIG_PCIE_CADENCE=y
> 
> =m
> 
>> +CONFIG_PCIE_CADENCE_HOST=y
>> +CONFIG_PCIE_CADENCE_EP=y
>> +CONFIG_PCI_J721E=y
> 
> =m

Also, see [0] for history. We really want these to be 
modules unless its necessary for bootup.

You may want to revive [1] and get it to mainline

[0] https://lore.kernel.org/linux-arm-kernel/CAK8P3a2VSBvOn1o+q1PYZaQ6LS9U4cz+DZGuDbisHkwNs2dAAw@mail.gmail.com/
[1] https://lore.kernel.org/linux-arm-kernel/20230110153805.GA1505901@bhelgaas/


[...]

-- 
Regards
Vignesh