gpio: add flags to export GPIOs when requesting
Introduce new flags to automatically export GPIOs when using the convenience
functions gpio_request_one() or gpio_request_array(). This eases support for
custom boards where lots of GPIOs need to be exported for customer
applications.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5a75510..566d012 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1302,8 +1302,18 @@
(flags & GPIOF_INIT_HIGH) ? 1 : 0);
if (err)
- gpio_free(gpio);
+ goto free_gpio;
+ if (flags & GPIOF_EXPORT) {
+ err = gpio_export(gpio, flags & GPIOF_EXPORT_CHANGEABLE);
+ if (err)
+ goto free_gpio;
+ }
+
+ return 0;
+
+ free_gpio:
+ gpio_free(gpio);
return err;
}
EXPORT_SYMBOL_GPL(gpio_request_one);