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| author |   Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> | 2016-09-08 04:48:15 +0300 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2016-09-12 14:27:41 +0200 |
| commit | e188cbf7564fba80e8339b9406e8740f3e495c63 (patch) | |
| tree | 5c995f28c24791d08b7f493c4e0ffe88ea48b665 /drivers/gpio | |
| parent | pinctrl: imx: accept gpio request/free from pinctrl (diff) | |
| download | linux-dev-e188cbf7564fba80e8339b9406e8740f3e495c63.tar.xz linux-dev-e188cbf7564fba80e8339b9406e8740f3e495c63.zip | |
gpio: mxc: shift gpio_mxc_init() to subsys_initcall level
In general situation on-SoC GPIO controller drivers should be probed
after pinctrl/pinmux controller driver, because on-SoC GPIOs utilize a
pin/pad as a resource provided and controlled by pinctrl subsystem.
This is stated in multiple places, e.g. from drivers/Makefile:
GPIO must come after pinctrl as gpios may need to mux pins etc
Looking at Freescale iMX SoC series specifics, imx*_pinctrl_init()
functions are called at arch_initcall and postcore_initcall init
levels, so the change of initcall level for gpio-mxc driver from
postcore_initcall to subsys_initcall level is sufficient. Also note
that the most of GPIO controller drivers settled at subsys_initcall
level.
If pinctrl subsystem manages pads with GPIO functions, the change is
needed to avoid unwanted driver probe deferrals during kernel boot.
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-mxc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 1b342a3842c8..1fdd5d804b5b 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -510,7 +510,7 @@ static int __init gpio_mxc_init(void) { return platform_driver_register(&mxc_gpio_driver); } -postcore_initcall(gpio_mxc_init); +subsys_initcall(gpio_mxc_init); MODULE_AUTHOR("Freescale Semiconductor, " "Daniel Mack <danielncaiaq.de>, " |