From: Tomasz Figa <t.figa@samsung.com>
To: linux-kernel@vger.kernel.org
Cc: devicetree-discuss@ozlabs.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH v3 1/4] pinctrl: add samsung pinctrl and gpiolib driver
Date: Wed, 05 Sep 2012 15:50:40 +0200 [thread overview]
Message-ID: <k27lbg$hrj$1@ger.gmane.org> (raw)
In-Reply-To: 1345720529-32315-2-git-send-email-thomas.abraham@linaro.org
Hi Thomas,
Thomas Abraham wrote:
> Add a new device tree enabled pinctrl and gpiolib driver for Samsung
> SoC's. This driver provides a common and extensible framework for all
> Samsung SoC's to interface with the pinctrl and gpiolib subsystems. This
> driver supports only device tree based instantiation and hence can be
> used only on those Samsung platforms that have device tree enabled.
>
> This driver is split into two parts: the pinctrl interface and the gpiolib
> interface. The pinctrl interface registers pinctrl devices with the
> pinctrl subsystem and gpiolib interface registers gpio chips with the
> gpiolib subsystem. The information about the pins, pin groups, pin
> functions and gpio chips, which are SoC specific, are parsed from device
> tree node.
>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Kukjin Kim <kgene.kim@samsung.com>
> Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Does the driver provide any kind of compatibility with current gpiolib
users?
Let me show an example of what I mean. We have a fixed voltage regulator
defined in device tree of an imaginary board
vemmc_reg: voltage-regulator@0 {
compatible = "regulator-fixed";
regulator-name = "VMEM_VDD_2.8V";
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
gpio = <&gpk0 2 1 0 0>;
enable-active-high;
};
The gpio pin used to control status of the regulator is defined using the
gpio property and regulator-fixed driver uses of_get_named_gpio to get the
pin number from device tree.
Is this kind of setup also valid when using your pinctrl driver?
Best regards,
--
Tomasz Figa
Samsung Poland R&D Center
next prev parent reply other threads:[~2012-09-05 14:00 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-23 11:15 [PATCH v3 0/4] pinctrl: add support for samsung pinctrl driver Thomas Abraham
2012-08-23 11:15 ` [PATCH v3 1/4] pinctrl: add samsung pinctrl and gpiolib driver Thomas Abraham
2012-08-23 23:12 ` Stephen Warren
2012-08-24 4:25 ` Thomas Abraham
2012-09-03 11:14 ` Linus Walleij
2012-09-04 19:47 ` Thomas Abraham
2012-09-04 21:45 ` Kukjin Kim
2012-09-05 6:20 ` Thomas Abraham
2012-09-06 17:33 ` Stephen Warren
2012-09-06 22:03 ` Kukjin Kim
2012-09-05 13:50 ` Tomasz Figa [this message]
2012-09-05 15:19 ` Thomas Abraham
2012-08-23 11:15 ` [PATCH v3 2/4] pinctrl: add exynos4210 specific extensions for samsung pinctrl driver Thomas Abraham
2012-09-03 11:16 ` Linus Walleij
2012-08-23 11:15 ` [PATCH v3 3/4] gpio: exynos4: skip gpiolib registration if pinctrl driver is used Thomas Abraham
2012-08-23 11:15 ` [PATCH v3 4/4] ARM: EXYNOS: skip wakeup interrupt setup " Thomas Abraham
2012-09-03 11:17 ` Linus Walleij
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='k27lbg$hrj$1@ger.gmane.org' \
--to=t.figa@samsung.com \
--cc=devicetree-discuss@ozlabs.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).