From: Arnd Bergmann <arnd@arndb.de>
To: srinivas.kandagatla@st.com
Cc: dong.aisheng@linaro.org, sameo@linux.intel.com,
Rob Landley <rob@landley.net>,
Grant Likely <grant.likely@secretlab.ca>,
Rob Herring <rob.herring@calxeda.com>,
Russell King <linux@arm.linux.org.uk>,
Linus Walleij <linus.walleij@linaro.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.cz>, Stuart Menefy <stuart.menefy@st.com>,
Shawn Guo <shawn.guo@linaro.org>, Olof Johansson <olof@lixom.net>,
Jason Cooper <jason@lakedaemon.net>,
Stephen Warren <swarren@nvidia.com>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Nicolas Pitre <nico@linaro.org>,
Will Deacon <will.deacon@arm.com>,
Dave Martin <dave.martin@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree-discuss@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org,
linux-serial@vger.kernel.org
Subject: Re: [RFC 3/8] mfd:syscon: Introduce claim/read/write/release APIs
Date: Wed, 8 May 2013 21:48:10 +0200 [thread overview]
Message-ID: <201305082148.10933.arnd@arndb.de> (raw)
In-Reply-To: <518A8C1D.3090600@st.com>
On Wednesday 08 May 2013, Srinivas KANDAGATLA wrote:
> the pinctrl driver calls syconf_claim(np, "st,alt-control) to get a
> field and then do a read/write on the field.
>
> Just in pinctrl driver we use around 50-100 sysconf registers scatters
> across different groups.
>
> Without these new APIs, its very difficult to pass this information to
> the drivers.
But are those necessarily things you would configure using DT?
If there are so many registers that are shared between mutliple
subsystems, maybe using drivers/mfd/syscon for that is taking things
further than you should, since it is unlike what any of the other
SoC families need from syscon.
Can you describe how your syscon registers are laid out?
Which subsystems beside pinctrl need to directly interact
with it? Is there any logical structure in it or do you just
have tons of bits scattered around an MMIO area?
Arnd
next prev parent reply other threads:[~2013-05-08 19:48 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1368022187-1633-1-git-send-email-srinivas.kandagatla@st.com>
2013-05-08 14:11 ` [RFC 2/8] ARM:global_timer: Add ARM global timer support Srinivas KANDAGATLA
2013-05-08 14:26 ` Rob Herring
2013-05-08 15:06 ` Stuart MENEFY
2013-05-08 14:38 ` Arnd Bergmann
2013-05-08 14:51 ` Steffen Trumtrar
2013-05-09 14:07 ` Srinivas KANDAGATLA
2013-05-09 14:51 ` Arnd Bergmann
2013-05-09 14:51 ` Srinivas KANDAGATLA
2013-05-08 14:11 ` [RFC 3/8] mfd:syscon: Introduce claim/read/write/release APIs Srinivas KANDAGATLA
2013-05-08 14:50 ` Arnd Bergmann
2013-05-08 15:01 ` Mark Brown
2013-05-08 17:42 ` Srinivas KANDAGATLA
2013-05-09 9:51 ` Mark Brown
2013-05-09 11:58 ` Srinivas KANDAGATLA
2013-05-09 13:26 ` Mark Brown
2013-05-09 14:00 ` Srinivas KANDAGATLA
2013-05-09 14:40 ` Mark Brown
2013-05-09 14:47 ` Srinivas KANDAGATLA
2013-05-10 12:51 ` Srinivas KANDAGATLA
2013-05-08 17:32 ` Srinivas KANDAGATLA
2013-05-08 19:48 ` Arnd Bergmann [this message]
2013-05-09 10:17 ` Srinivas KANDAGATLA
2013-05-17 14:36 ` Arnd Bergmann
2013-05-20 12:48 ` Srinivas KANDAGATLA
2013-05-23 21:44 ` Arnd Bergmann
2013-05-24 16:06 ` Srinivas KANDAGATLA
2013-05-08 14:11 ` =?y?q?=5BRFC=205/8=5D=20ARM=3Astih41x=3A=20Add=20STiH415=20SOC=20support?= Srinivas KANDAGATLA
2013-05-08 16:18 ` [RFC 5/8] ARM:stih41x: Add STiH415 SOC support Arnd Bergmann
2013-05-08 16:21 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 16:50 ` Stephen GALLIMORE
2013-05-08 18:55 ` Arnd Bergmann
2013-05-09 11:09 ` Stephen GALLIMORE
2013-05-08 17:03 ` Srinivas KANDAGATLA
2013-05-08 14:11 ` [RFC 6/8] ARM:stih41x: Add STiH416 " Srinivas KANDAGATLA
2013-05-08 14:12 ` [RFC 7/8] ARM:stih41x: Add B2000 board support Srinivas KANDAGATLA
2013-05-08 16:20 ` Arnd Bergmann
2013-05-08 16:24 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 17:04 ` Srinivas KANDAGATLA
2013-05-08 14:12 ` [RFC 8/8] ARM:stih41x: Add B2020 " Srinivas KANDAGATLA
[not found] ` <1368022248-2153-1-git-send-email-srinivas.kandagatla@st.com>
2013-05-08 14:34 ` [RFC 1/8] serial:st-asc: Add ST ASC driver Arnd Bergmann
2013-05-08 14:39 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 18:18 ` Srinivas KANDAGATLA
2013-05-08 19:55 ` Arnd Bergmann
[not found] ` <20130508153459.GA17186@kroah.com>
2013-05-08 15:40 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 15:53 ` Greg KH
2013-05-08 16:03 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 16:15 ` Greg KH
2013-05-08 16:31 ` Arnd Bergmann
2013-05-08 16:36 ` Greg KH
2013-05-10 23:29 ` Russell King - ARM Linux
2013-05-08 16:39 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 16:45 ` Nicolas Pitre
2013-05-08 18:35 ` Arnd Bergmann
2013-05-09 13:36 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 16:10 ` Stephen GALLIMORE
2013-05-10 13:50 ` Stephen GALLIMORE
2013-05-10 14:08 ` Greg KH
2013-05-08 18:02 ` Srinivas KANDAGATLA
2013-05-20 11:49 ` Stephen GALLIMORE
2013-05-22 15:13 ` Arnd Bergmann
2013-05-23 16:26 ` Stephen GALLIMORE
[not found] ` <1368022284-2283-1-git-send-email-srinivas.kandagatla@st.com>
2013-05-08 15:06 ` [RFC 4/8] pinctrl:stixxxx: Add pinctrl and pinconf support Jean-Christophe PLAGNIOL-VILLARD
2013-05-08 16:27 ` Srinivas KANDAGATLA
2013-05-08 16:38 ` Jean-Christophe PLAGNIOL-VILLARD
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