linux-kernel - Re: [PATCH 0/7] ARM: dts: dra7: Enable x2 lane mode support

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Date:   Wed, 7 Mar 2018 17:57:37 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:     Tony Lindgren <tony@...mide.com>, <bcousson@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <nsekhar@...com>
Subject: Re: [PATCH 0/7] ARM: dts: dra7: Enable x2 lane mode support

Hi Lorenzo,

On Wednesday 07 March 2018 05:38 PM, Lorenzo Pieralisi wrote:
> On Tue, Dec 19, 2017 at 03:01:26PM +0530, Kishon Vijay Abraham I wrote:
>> Add properties to enable PCIe x2 lane mode since all dra7
>> based SoCs support x2 lane mode.
>>
>> However only dra76-evm has a slot which can support x2 lane
>> cards. Hence only enable x2 lane mode in dra76-evm.
>> (am571x-idk can support x2 lane mode but that makes usb port
>> not functional so not including the patch to enable
>> x2 mode in am571x-idk)
>>
>> Also included in this series is patch to enable PCIe configs
>> (both host and device) in omap2plus_defconfig and
>> multi_v7_defconfig
>>
>> In order to get x2 mode working [1] is required.
>>
>> However by keeping the older compatible, this series won't
>> break functionality if this series is merged before [1]
>>
>> [1] -> https://lkml.org/lkml/2017/12/19/175
>>
>> Kishon Vijay Abraham I (7):
>>   ARM: dts: dra7: Add properties to enable PCIe x2 lane mode
>>   ARM: dts: DRA74x: Use PCIe compatible specific to dra74
>>   ARM: dts: DRA72x: Use PCIe compatible specific to dra72
>>   ARM: dts: dra76-evm: Enable x2 PCIe lanes
>>   ARM: dts: dra7: Remove deprecated PCI compatible string
>>   ARM: omap2plus_defconfig: Enable CONFIG_PCI_DRA7XX (Host & Device
>>     modes)
>>   ARM: multi_v7_defconfig: Enable CONFIG_PCI_DRA7XX (Host & Device
>>     modes)
>>
>>  arch/arm/boot/dts/dra7.dtsi          |  9 +++++----
>>  arch/arm/boot/dts/dra72x.dtsi        | 12 ++++++++++++
>>  arch/arm/boot/dts/dra74x.dtsi        | 12 ++++++++++++
>>  arch/arm/boot/dts/dra76-evm.dts      | 16 ++++++++++++++++
>>  arch/arm/configs/multi_v7_defconfig  |  6 ++++++
>>  arch/arm/configs/omap2plus_defconfig |  8 ++++++++
>>  6 files changed, 59 insertions(+), 4 deletions(-)
> 
> Hi Kishon,
> 
> I would like to ask you please what are your expectations with this
> series, which tree these changes are going to be queued through ?
> 
> Please let me know, thanks.

Rob has given some comments on the dt [1]. I'll post the driver changes and
once that gets accepted I'll post the dts changes. dts changes are generally
merged via linux-omap tree maintained by Tony.

Thanks
Kishon

https://lkml.org/lkml/2017/12/20/625
> 
> Lorenzo
>