treewide: gpio-export: add error handling

Check if the GPIO is valid (or set at all). If no GPIO is set in the
devicetree, a gpiolib related kernel warning + stacktrace is shown during
boot and gpio-export reports GPIOs as exported albeit none really is.

Signed-off-by: Mathias Kresin <dev@kresin.me>
This commit is contained in:
Mathias Kresin 2018-06-28 18:23:37 +02:00
parent 750e4b62b1
commit a570933999
3 changed files with 9 additions and 3 deletions

View file

@ -22,7 +22,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
#include "gpiolib.h"
@@ -506,3 +508,69 @@ void of_gpiochip_remove(struct gpio_chip
@@ -506,3 +508,71 @@ void of_gpiochip_remove(struct gpio_chip
gpiochip_remove_pin_ranges(chip);
of_node_put(chip->of_node);
}
@ -56,6 +56,8 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ enum of_gpio_flags of_flags;
+
+ gpio = of_get_gpio_flags(cnp, i, &of_flags);
+ if (!gpio_is_valid(gpio))
+ return gpio;
+
+ if (of_flags == OF_GPIO_ACTIVE_LOW)
+ flags |= GPIOF_ACTIVE_LOW;

View file

@ -22,7 +22,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
#include "gpiolib.h"
@@ -506,3 +508,73 @@ void of_gpiochip_remove(struct gpio_chip
@@ -506,3 +508,75 @@ void of_gpiochip_remove(struct gpio_chip
gpiochip_remove_pin_ranges(chip);
of_node_put(chip->of_node);
}
@ -58,6 +58,8 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ enum of_gpio_flags of_flags;
+
+ gpio = of_get_gpio_flags(cnp, i, &of_flags);
+ if (!gpio_is_valid(gpio))
+ return gpio;
+
+ if (of_flags == OF_GPIO_ACTIVE_LOW)
+ flags |= GPIOF_ACTIVE_LOW;

View file

@ -22,7 +22,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
#include "gpiolib.h"
@@ -506,3 +508,69 @@ void of_gpiochip_remove(struct gpio_chip
@@ -506,3 +508,71 @@ void of_gpiochip_remove(struct gpio_chip
gpiochip_remove_pin_ranges(chip);
of_node_put(chip->of_node);
}
@ -56,6 +56,8 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ enum of_gpio_flags of_flags;
+
+ gpio = of_get_gpio_flags(cnp, i, &of_flags);
+ if (!gpio_is_valid(gpio))
+ return gpio;
+
+ if (of_flags == OF_GPIO_ACTIVE_LOW)
+ flags |= GPIOF_ACTIVE_LOW;