linux-kernel - Re: [PATCH 2/2] ARM: dts: MSM8974: Add pinctrl node

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Date:	Tue, 08 Apr 2014 07:33:11 -0500
From:	Timur Tabi <timur@...eaurora.org>
To:	"Ivan T. Ivanov" <iivanov@...sol.com>
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	devicetree@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/2] ARM: dts: MSM8974: Add pinctrl node

Ivan T. Ivanov wrote:
>> >I'm confused by this.  Isn't this information already defined in the
>> >pinctrl-msm8x74.c driver?
>> >
>> >static const char * const blsp_spi8_groups[] = {
>> >     "gpio45", "gpio46", "gpio47", "gpio48"
>> >};
> I am not sure that I understand the question. This is one of
> possible ways to describe relationship between pins and functions.
> As they are described is visible what is their real purpose.

Ok, let me rephrase.

The 8x74 pinctrl driver already contains this information.  It already 
defines a "blsp_spi8" group consisting of GPIOs 45, 46, 47, and 48.

This patch adds that same exact information into the device tree.  Why 
are we duplicating that information?  Why add it to the device tree when 
it's already in the driver (and already working).

Also, I don't see any code anywhere that uses these new device tree nodes.

--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
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