From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Subject: Re: [RESEND PATCH v3 1/2] device property: Add
 function to search for named child of device
Date: Tue, 21 Jun 2016 14:59:47 +0300
Message-ID: <20160621115947.GZ1739@lahna.fi.intel.com>
References: <cover.1466421714.git.Adam.Thomson.Opensource@diasemi.com>
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To: "Opensource [Adam Thomson]" <Adam.Thomson.Opensource@diasemi.com>
Cc: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, Heikki Krogerus <heikki.krogerus@linux.intel.com>, Support Opensource <Support.Opensource@diasemi.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Mark Brown <broonie@kernel.org>, "Rafael J.Wysocki" <rafael.j.wysocki@intel.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Robert Moore <robert.moore@intel.com>, Liam Girdwood <lgirdwood@gmail.com>, "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>, Lv Zheng <lv.zheng@intel.com>, Takashi Iwai <tiwai@suse.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Frank Rowand <frowand.list@gmail.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Len Brown <lenb@kernel.org>
List-Id: devicetree@vger.kernel.org

On Tue, Jun 21, 2016 at 11:50:01AM +0000, Opensource [Adam Thomson] wrote:
> 21 June 2016 12:42, Rafael J. Wysocki wrote:
> 
> > > > +static inline bool acpi_data_node_match(struct fwnode_handle *fwnode,
> > > > +					const char *name)
> > > > +{
> > > > +	return is_acpi_data_node(fwnode) ?
> > > > +		(!strcasecmp(to_acpi_data_node(fwnode)->name, name)) : false;
> > > > +}
> > >
> > > Looks fine to me.
> > >
> > > One question - is it expected that matching ACPI data nodes is always
> > > case insensitive?
> > 
> > That would not be a correct expectation in theory, although I don't think it
> > really matters in practice.
> 
> From my reading of the Hierarchical Data Extension and ACPI Spec, I thought
> that was the case (section 19.3.1 ASL Names - ASL names are not case-sensitive
> and will be converted to upper case). Am I misreading the documents/missing
> something else?

Those are names in the ASL code itself.

What we are talking here are actually just string values (name of the
data node).