From: khilman@deeprootsystems•com (Kevin Hilman)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 5/7] crypto: omap-sham: Convert to use pm_runtime API
Date: Thu, 25 Oct 2012 17:34:02 -0700 [thread overview]
Message-ID: <87lieunkat.fsf@deeprootsystems.com> (raw)
In-Reply-To: <1351046167-4882-6-git-send-email-mgreer@animalcreek.com> (Mark A. Greer's message of "Tue, 23 Oct 2012 19:36:05 -0700")
Hi Mark,
"Mark A. Greer" <mgreer@animalcreek•com> writes:
> From: "Mark A. Greer" <mgreer@animalcreek•com>
>
> Convert the omap-sham crypto driver to use the
> pm_runtime API instead of the clk API.
>
> CC: Kevin Hilman <khilman@deeprootsystems•com>
> CC: Paul Walmsley <paul@pwsan•com>
> CC: Dmitry Kasatkin <dmitry.kasatkin@intel•com>
> Signed-off-by: Mark A. Greer <mgreer@animalcreek•com>
I can't pretend to fully understand this driver, It looks like the
current code is doing a bit more fine-grained clock gating, and leaving
the IP clocked only when needed.
The proposed version does a 'get' in probe and a 'put' in remove, which
means the IP will always be enabled (and thus preventing low-power
states), even when it's not in use.
If that's really needed, it should be thoroughly described in the
changelog, otherwise I suggest doing the runtime PM 'get' and 'put' in
roughtly the same spots as the current clk enable/disable which makes
this a more straight-forward conversion.
Kevin
next prev parent reply other threads:[~2012-10-26 0:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-24 2:36 [PATCH v2 0/7] crypto: omap-sham updates Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 1/7] ARM: OMAP2xxx: hwmod: Convert SHAM crypto device data to hwmod Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 2/7] ARM: OMAP2xxx: hwmod: Add DMA support for SHAM module Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 3/7] ARM: OMAP3xxx: hwmod: Convert SHAM crypto device data to hwmod Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 4/7] ARM: OMAP2+: Remove unnecessary message when no SHA IP is present Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 5/7] crypto: omap-sham: Convert to use pm_runtime API Mark A. Greer
2012-10-26 0:34 ` Kevin Hilman [this message]
2012-10-26 17:10 ` Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 6/7] crypto: omap-sham: Add code to use dmaengine API Mark A. Greer
2012-10-24 2:36 ` [PATCH v2 7/7] crypto: omap_sham: Remove usage of private DMA API Mark A. Greer
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