From: Aaron Lu <aaron.lu@intel.com>
To: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: linux-ide@vger.kernel.org, tj@kernel.org
Subject: Re: [PATCH] libata-zpodd: must use ata_tf_init()
Date: Thu, 27 Jun 2013 09:15:19 +0800 [thread overview]
Message-ID: <51CB9227.30307@intel.com> (raw)
In-Reply-To: <51CACC16.9050005@cogentembedded.com>
On 06/26/2013 07:10 PM, Sergei Shtylyov wrote:
> Hello.
>
> On 26-06-2013 6:05, Aaron Lu wrote:
>
>>> There are some SATA controllers which have both devices 0 and 1 but this module
>
>> Do you mean a SATA port can connect to two SATA devices without PMP?
>
> No, I mean 2 SATA ports combined in one ATA channel as 2 devices.
> Look for SLAVE_POSS in drivers/ata/[s]ata*.c...
Oh yes that happened when the SATA controller is in IDE programming
mode, not AHCI.
ZPODD is only supported for SATA controllers in AHCI programming mode,
the ACPI table will not support power off the port if the controller is
in IDE mode, so the device 1 case shouldn't happen in practice :-)
Thanks,
Aaron
next prev parent reply other threads:[~2013-06-27 1:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-23 19:25 [PATCH] libata-zpodd: must use ata_tf_init() Sergei Shtylyov
2013-06-23 19:34 ` Sergei Shtylyov
2013-06-24 22:46 ` Tejun Heo
2013-06-26 2:05 ` Aaron Lu
2013-06-26 11:10 ` Sergei Shtylyov
2013-06-27 1:15 ` Aaron Lu [this message]
2013-06-28 12:49 ` Sergei Shtylyov
2013-06-29 13:04 ` Aaron Lu
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