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| author | Dmitry Osipenko <digetx@gmail.com> | 2018-08-02 13:11:44 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-08-03 19:26:03 +0200 |
| commit | 40b25bce0adbe641a744d1291bc0e51fb7f3c3d8 (patch) | |
| tree | 8e4644846d560092ebde1bed2ccf0198f786937a /drivers | |
| parent | pinctrl: tegra: Move drivers registration to arch_init level (diff) | |
| download | linux-40b25bce0adbe641a744d1291bc0e51fb7f3c3d8.tar.xz linux-40b25bce0adbe641a744d1291bc0e51fb7f3c3d8.zip | |
gpio: tegra: Move driver registration to subsys_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')
| -rw-r--r-- | drivers/gpio/gpio-tegra.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index 94396caaca75..d5d79727c55d 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -720,4 +720,4 @@ static int __init tegra_gpio_init(void) { return platform_driver_register(&tegra_gpio_driver); } -postcore_initcall(tegra_gpio_init); +subsys_initcall(tegra_gpio_init); |