From: Maxime Coquelin <maxime.coquelin-qxv4g6HH51o@public.gmane.org>
To: Dong Aisheng <b29396-KZfg59tc24xl57MIdRCFDg@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Cc: Seraphin BONNAFFE
<seraphin.bonnaffe-qxv4g6HH51o@public.gmane.org>,
Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Grant Likely
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Holes management in syscon driver
Date: Thu, 25 Sep 2014 18:44:05 +0200 [thread overview]
Message-ID: <54244655.1090801@st.com> (raw)
Hi Dong, all,
We use syscon driver on our STi platforms to manage our system config registers.
We declare one syscon instance per sysconf bank.
The problem we are facing is that these banks have holes, and when using regmap's debugfs interface to dump the registers, we get imprecise aborts.
My first idea would be do implement the .readable_reg and .writeable_reg callbacks offered by regmap in syscon driver, and provide ranges where there are registers via DT.
But I am not sure how would look the DT bindings.
What is your view on this?
Are other syscon users having the same issue?
Regards,
Maxime
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next reply other threads:[~2014-09-25 16:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-25 16:44 Maxime Coquelin [this message]
2014-10-07 13:22 ` [RFC PATCH 0/2] mfd: syscon: declare holes in syscon register maps Seraphin Bonnaffe
[not found] ` <1412688148-20835-1-git-send-email-seraphin.bonnaffe-qxv4g6HH51o@public.gmane.org>
2014-10-07 13:22 ` [RFC PATCH 1/2] mfd: syscon: Document new DT binding "holes" Seraphin Bonnaffe
2014-10-07 13:22 ` [RFC PATCH 2/2] mfd: syscon: specify rd_table and wr_table from DT Seraphin Bonnaffe
2014-10-08 11:12 ` [RFC PATCH 0/2] mfd: syscon: declare holes in syscon register maps Maxime Coquelin
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