]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/commit
gpio: tegra: Move driver registration to subsys_init level
authorDmitry Osipenko <digetx@gmail.com>
Thu, 2 Aug 2018 11:11:44 +0000 (14:11 +0300)
committerJuerg Haefliger <juergh@canonical.com>
Wed, 24 Jul 2019 01:47:29 +0000 (19:47 -0600)
commitd6aa45fc027b6282827f77bec53d93b75097abec
tree095fd0494c1ef48ae64690ac0f1ff2c734981e1b
parent956bc6ff31dad4470aa430592db7b7f7545fbc7b
gpio: tegra: Move driver registration to subsys_init level

BugLink: https://bugs.launchpad.net/bugs/1836117
[ Upstream commit 40b25bce0adbe641a744d1291bc0e51fb7f3c3d8 ]

There is a bug in regards to deferred probing within the drivers core
that causes GPIO-driver to suspend after its users. The bug appears if
GPIO-driver probe is getting deferred, which happens after introducing
dependency on PINCTRL-driver for the GPIO-driver by defining "gpio-ranges"
property in device-tree. The bug in the drivers core is old (more than 4
years now) and is well known, unfortunately there is no easy fix for it.
The good news is that we can workaround the deferred probe issue by
changing GPIO / PINCTRL drivers registration order and hence by moving
PINCTRL driver registration to the arch_init level and GPIO to the
subsys_init.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
drivers/gpio/gpio-tegra.c