linux-kernel - Re: [PATCH 2/2] ata: ahci: add support for DaVinci DM816 SATA controller

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Message-ID: <7ab4b440-f9d0-22fa-f463-f4c5542e21e7@baylibre.com>
Date:   Tue, 14 Mar 2017 10:00:07 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Tejun Heo <tj@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Patrick Titiano <ptitiano@...libre.com>
Cc:     linux-ide@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ata: ahci: add support for DaVinci DM816 SATA
 controller

On 03/14/2017 09:57 AM, Sergei Shtylyov wrote:
> Hello!
> 
> On 3/13/2017 7:36 PM, Bartosz Golaszewski wrote:
> 
>> This SATA controller is quite similar to the one present on the DA850
>> SoC, but the PHY configuration is different and it supports two HBA
>> ports.
>>
>> The IP suffers from the same PMP issue the DA850 does - if we enable
>> PMP but don't use it - softreset fails. Appropriate workaround was
>> implemented in this driver as well.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
>> ---
>>  drivers/ata/Kconfig      |   9 +++
>>  drivers/ata/Makefile     |   1 +
>>  drivers/ata/ahci_dm816.c | 200 +++++++++++++++++++++++++++++++++++++++++++++++
>>  3 files changed, 210 insertions(+)
>>  create mode 100644 drivers/ata/ahci_dm816.c
>>
>> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
>> index 70b57d2..7f59a7a 100644
>> --- a/drivers/ata/Kconfig
>> +++ b/drivers/ata/Kconfig
>> @@ -118,6 +118,15 @@ config AHCI_DA850
>>
>>        If unsure, say N.
>>
>> +config AHCI_DM816
>> +    tristate "DaVinci DM816 AHCI SATA support"
> 
>    Is it really DaVinci?
> 
>> +    depends on ARCH_OMAP2PLUS
> 
>    Especially if it depends on OMAP...

Hi Sergei,

Yes it's a DaVinci family SoC, but shares a lot of IPs with the OMAP family.

Neil

> 
> [...]
> 
> MBR, Sergei
>