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author | Dmitry Osipenko <digetx@gmail.com> | 2018-08-02 13:11:43 +0200 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2018-08-03 19:17:39 +0200 |
commit | 1e0813ee5599932c856bda64a568895ed7a33d3a (patch) | |
tree | 7af062c439058bc020f867aefb90a741197c73a9 /drivers/pinctrl/tegra/pinctrl-tegra210.c | |
parent | pinctrl: baytrail: actually print the apparently misconfigured pin (diff) | |
download | linux-1e0813ee5599932c856bda64a568895ed7a33d3a.tar.xz linux-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-tegra210.c')
-rw-r--r-- | drivers/pinctrl/tegra/pinctrl-tegra210.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra210.c b/drivers/pinctrl/tegra/pinctrl-tegra210.c index 0956a1c73391..3e77f5474dd8 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra210.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra210.c @@ -1582,4 +1582,9 @@ static struct platform_driver tegra210_pinctrl_driver = { }, .probe = tegra210_pinctrl_probe, }; -builtin_platform_driver(tegra210_pinctrl_driver); + +static int __init tegra210_pinctrl_init(void) +{ + return platform_driver_register(&tegra210_pinctrl_driver); +} +arch_initcall(tegra210_pinctrl_init); |