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authorVladimir Zapolskiy <vladimir_zapolskiy@mentor.com>2016-09-08 03:48:15 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-09-12 14:27:41 +0200
commite188cbf7564fba80e8339b9406e8740f3e495c63 (patch)
tree5c995f28c24791d08b7f493c4e0ffe88ea48b665 /drivers/gpio/gpio-mxc.c
parentpinctrl: imx: accept gpio request/free from pinctrl (diff)
downloadlinux-e188cbf7564fba80e8339b9406e8740f3e495c63.tar.xz
linux-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/gpio-mxc.c')
-rw-r--r--drivers/gpio/gpio-mxc.c2
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>, "