linux-kernel - [PATCH 0/3] arm: kirkwood: model cpu clock mux and update cpufreq driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1409597225-24368-1-git-send-email-mturquette@linaro.org>
Date:	Mon,  1 Sep 2014 11:47:02 -0700
From:	Mike Turquette <mturquette@...aro.org>
To:	linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	patches@...aro.org, Mike Turquette <mturquette@...aro.org>,
	Andrew Lunn <andrew@...n.ch>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>
Subject: [PATCH 0/3] arm: kirkwood: model cpu clock mux and update cpufreq driver

While reviewing Tomeu's "Per-user clock constraints" series I saw that
the Kirkwood cpufreq driver needed to use a new, public clk_is_enabled()
which I hoped not to merge [0].

This led to some investigation as to why this was needed and with
Andrew's help I came to realize that the powersave_clk on the kirkwood
platform acts more like a clock signal multiplexer than a gate. This mux
is unique to Kirkwood; none of the other mvebu platforms have it.

This series updates the kirkwood clock driver to model the powersave_clk
as a mux instead of a gate, and it updates and slightly simplifies the
cpufreq driver to use this clock as a mux.

Rafael & Viresh: I'd prefer to merge the cpufreq driver patch through
the clock tree since Tomeu's changes to the clock core depend on it.

[0] http://lkml.kernel.org/r/CAPtuhThyUPrY2AqVEsyRQqR-8hsj_GAe1W0u_XXonP-C2o_Xew@mail.gmail.com

Mike Turquette (3):
  clk: mvebu: share locks between gate clocks
  clk: mvebu: powersave clock is a multiplexer
  cpufreq: kirkwood: use the powersave multiplexer

 drivers/clk/mvebu/common.c         |   9 ++--
 drivers/clk/mvebu/common.h         |   2 +
 drivers/clk/mvebu/kirkwood.c       | 102 ++++++++++++++++++++++++++++++++++++-
 drivers/cpufreq/kirkwood-cpufreq.c |  14 ++---
 4 files changed, 113 insertions(+), 14 deletions(-)

-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/