linux-kernel - Re: [PATCH v2] ARC: Add PCIe support for ARC HSDK platform

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Message-ID: <69393589-e549-29f0-6272-b263539b82e8@synopsys.com>
Date:   Thu, 21 Jun 2018 17:26:04 +0100
From:   Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
To:     Vineet Gupta <Vineet.Gupta1@...opsys.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        "eugeniy.paltsev@...opsys.com" <eugeniy.paltsev@...opsys.com>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        "robh@...nel.org" <robh@...nel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "joao.pinto@...opsys.com" <joao.pinto@...opsys.com>
CC:     "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH v2] ARC: Add PCIe support for ARC HSDK platform

On 21/06/2018 17:07, Vineet Gupta wrote:
> On 06/21/2018 07:06 AM, Gustavo Pimentel wrote:
>> Add PCI support to the ARC HSDK platform allowing to use the generic PCI
>> setup functions.
>>
>> Signed-off-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
>> Acked-by: Alexey Brodkin <abrodkin@...opsys.com>
> 
> Queued to #for-curr after minor fixed up to commit msg subject "ARC: [plat-hsdk]"
> 
> Curious, how exactly are you going to use PCI on hsdk ? What is the use case.

The ARC HSDK board is mounted on top of a HAPS DX7 or HAPS-80 using the HT3
connectors. The HAPS DX7 or HAPS-80 provides the PCIe Root Complex using the
Synopsys DesignWare PCIe IP.

Basically I'm migrating the existing use case from ARC AXS101 to ARC HSDK.

> 
>> ---
>>  arch/arc/plat-hsdk/Kconfig | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arc/plat-hsdk/Kconfig b/arch/arc/plat-hsdk/Kconfig
>> index 19ab3cf..556bc5e 100644
>> --- a/arch/arc/plat-hsdk/Kconfig
>> +++ b/arch/arc/plat-hsdk/Kconfig
>> @@ -9,3 +9,4 @@ menuconfig ARC_SOC_HSDK
>>  	bool "ARC HS Development Kit SOC"
>>  	select CLK_HSDK
>>  	select RESET_HSDK
>> +	select MIGHT_HAVE_PCI
>