From: Stefan Wahren <stefan.wahren@i2se.com>
To: Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <brgl@bgdev.pl>,
Florian Fainelli <f.fainelli@gmail.com>,
Nicolas Saenz Julienne <nsaenz@kernel.org>
Cc: Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
bcm-kernel-feedback-list@broadcom.com,
Arnd Bergmann <arnd@arndb.de>, Phil Elwell <phil@raspberrypi.com>,
linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
Stefan Wahren <stefan.wahren@i2se.com>
Subject: [PATCH RFC 0/2] gpiolib: of: Introduce hook for missing gpio-ranges
Date: Wed, 9 Mar 2022 20:43:44 +0100 [thread overview]
Message-ID: <1646855026-9132-1-git-send-email-stefan.wahren@i2se.com> (raw)
This patch series tries to provide backward compatibility for DTB which
lacks the gpio-ranges property.
The commit ("pinctrl: msm: fix gpio-hog related boot issues") by Christian
Lamparter already contains a fallback in case the gpio-ranges property
is missing. But this approach doesn't work on BCM2835 with a gpio-hog
defined for the SoC GPIOs.
Based Christian's on explanation i conclude that the fallback must happen
during the gpiochip_add() call and not afterwards. So the approach is to
call an optional hook, which can be implemented in the platform driver.
This series has been tested on Raspberry Pi 3 B Plus.
Stefan Wahren (2):
gpiolib: of: Introduce hook for missing gpio-ranges
pinctrl: bcm2835: implement hook for missing gpio-ranges
drivers/gpio/gpiolib-of.c | 5 +++++
drivers/pinctrl/bcm/pinctrl-bcm2835.c | 18 ++++++++++++++++++
include/linux/gpio/driver.h | 12 ++++++++++++
3 files changed, 35 insertions(+)
--
2.7.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-03-09 19:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-09 19:43 Stefan Wahren [this message]
2022-03-09 19:43 ` [PATCH RFC 1/2] " Stefan Wahren
2022-03-15 15:17 ` Bartosz Golaszewski
2022-03-09 19:43 ` [PATCH RFC 2/2] pinctrl: bcm2835: implement " Stefan Wahren
2022-03-10 3:24 ` [PATCH RFC 0/2] gpiolib: of: Introduce " Florian Fainelli
2022-03-17 1:15 ` Linus Walleij
2022-03-17 2:02 ` Florian Fainelli
2022-03-17 11:48 ` Stefan Wahren
2022-03-17 17:17 ` Florian Fainelli
2022-03-17 19:23 ` Stefan Wahren
2022-03-21 18:21 ` Florian Fainelli
2022-03-24 19:00 ` Linus Walleij
2022-03-24 19:23 ` Florian Fainelli
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=1646855026-9132-1-git-send-email-stefan.wahren@i2se.com \
--to=stefan.wahren@i2se.com \
--cc=arnd@arndb.de \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=brgl@bgdev.pl \
--cc=f.fainelli@gmail.com \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-gpio@vger.kernel.org \
--cc=nsaenz@kernel.org \
--cc=phil@raspberrypi.com \
--cc=rjui@broadcom.com \
--cc=sbranden@broadcom.com \
--subject='Re: [PATCH RFC 0/2] gpiolib: of: Introduce hook for missing gpio-ranges' \
/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
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).