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From: Tony Lindgren <tony@atomide.com>
To: Sebastian Reichel <sre@kernel.org>
Cc: "Matt Mackall" <mpm@selenic.com>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	linux-crypto@vger.kernel.org,
	"Aaro Koskinen" <aaro.koskinen@iki.fi>,
	"Adam Ford" <aford173@gmail.com>,
	"Pali Rohár" <pali.rohar@gmail.com>,
	"Tero Kristo" <t-kristo@ti.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	devicetree@vger.kernel.org
Subject: Re: [PATCH 3/6] hwrng: omap3-rom - Call clk_prepare() on init and exit only
Date: Sat, 14 Sep 2019 10:57:59 -0700
Message-ID: <20190914175759.GV52127@atomide.com> (raw)
In-Reply-To: <20190914125427.nvbrxoubvll43b3j@earth.universe>

* Sebastian Reichel <sre@kernel.org> [190914 13:01]:
> Hi,
> 
> On Fri, Sep 13, 2019 at 03:09:19PM -0700, Tony Lindgren wrote:
> > Also, we should not call prepare and unprepare except during init, and
> > only call enable and disable during use.
> 
> Why? Usually clk_(un)prepare() is the part saving most power, so I
> would expect the runtime resume handlers to call clk_prepare_enable
> and vice versa in the suspend handler.

Sure yeah fine with me, clk_prepare_enable() is more generic at the
cost of some extra calls to toggle a clock gate bit :) Let's also
forget the probe changes, those will get cleared with the runtime
PM changes anyways.

Regards,

Tony

  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-13 22:09 [PATCH 0/6] Non-urgent fixes and improvments for omap3-rom-rng Tony Lindgren
2019-09-13 22:09 ` [PATCH 1/6] ARM: OMAP2+: Check omap3-rom-rng for GP device instead of HS device Tony Lindgren
2019-09-13 22:09 ` [PATCH 2/6] hwrng: omap3-rom - Fix missing clock by probing with device tree Tony Lindgren
2019-09-13 22:09 ` [PATCH 3/6] hwrng: omap3-rom - Call clk_prepare() on init and exit only Tony Lindgren
2019-09-14 12:54   ` Sebastian Reichel
2019-09-14 17:57     ` Tony Lindgren [this message]
2019-09-13 22:09 ` [PATCH 4/6] hwrng: omap3-rom - Initialize default quality to get data Tony Lindgren
2019-09-13 22:09 ` [PATCH 5/6] hwrng: omap3-rom - Update to use standard driver data Tony Lindgren
2019-09-13 22:09 ` [PATCH 6/6] hwrng: omap3-rom - Use runtime PM instead of custom functions Tony Lindgren
2019-09-14 13:05 ` [PATCH 0/6] Non-urgent fixes and improvments for omap3-rom-rng Sebastian Reichel
2019-09-14 17:59   ` Tony Lindgren

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