diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2018-08-02 14:11:43 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-08-03 19:17:39 +0200 |
| commit | 1e0813ee5599932c856bda64a568895ed7a33d3a (patch) | |
| tree | 7af062c439058bc020f867aefb90a741197c73a9 /drivers/pinctrl/tegra/pinctrl-tegra114.c | |
| parent | 973232e2a327cbf30b50b678af081426ca403088 (diff) | |
| download | lwn-1e0813ee5599932c856bda64a568895ed7a33d3a.tar.gz lwn-1e0813ee5599932c856bda64a568895ed7a33d3a.zip | |
pinctrl: tegra: Move drivers registration to arch_init level
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>
Diffstat (limited to 'drivers/pinctrl/tegra/pinctrl-tegra114.c')
| -rw-r--r-- | drivers/pinctrl/tegra/pinctrl-tegra114.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra114.c b/drivers/pinctrl/tegra/pinctrl-tegra114.c index 511a8774fd8d..d43c209e9c30 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra114.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra114.c @@ -1868,4 +1868,9 @@ static struct platform_driver tegra114_pinctrl_driver = { }, .probe = tegra114_pinctrl_probe, }; -builtin_platform_driver(tegra114_pinctrl_driver); + +static int __init tegra114_pinctrl_init(void) +{ + return platform_driver_register(&tegra114_pinctrl_driver); +} +arch_initcall(tegra114_pinctrl_init); |