From: Wilfried Weissmann <Wilfried.Weissmann@gmx.at>
To: James Bottomley <James.Bottomley@HansenPartnership.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org, Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH 1/1] mvsas: add SGPIO support to Marvell 94xx
Date: Sun, 27 Dec 2015 21:30:23 +0100 [thread overview]
Message-ID: <56804A5F.5040000@gmx.at> (raw)
In-Reply-To: <1451245374.2283.2.camel@HansenPartnership.com>
Am 27.12.15 um 20:42 schrieb James Bottomley:
> On Sun, 2015-12-27 at 20:21 +0100, Wilfried Weissmann wrote:
>> add SGPIO support to Marvell 94xx
>
> How do you actually use this? It doesn't seem to be plumbed into the
> standard GPIO subsystem and there appears to be no user accessible
> interface for it either (nor is it used internally).
>
> There doesn't appear to be much point adding an unusable feature.
sas_domain_function_template.lldd_write_gpio exposes the interface to libsas. Userspace access is then done via ioctl(SG_IO,...). Existing user space tools such as ledmon use this method, also smp_utils in case you want to have more direct control.
Greetings,
Wilfried
next prev parent reply other threads:[~2015-12-27 20:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-13 10:43 [PATCH 1/1] mvsas: add SGPIO support to Marvell 94xx Wilfried Weissmann
2015-12-18 9:19 ` Hannes Reinecke
2015-12-22 2:43 ` Martin K. Petersen
2015-12-27 19:21 ` Wilfried Weissmann
2015-12-27 19:42 ` James Bottomley
2015-12-27 20:30 ` Wilfried Weissmann [this message]
2015-12-28 21:47 ` James Bottomley
2016-01-06 20:29 ` Martin K. Petersen
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