The gpio library should return -EPROBE_DEFER in gpio_request if gpio driver is not ready. If drivers pass this error code through to their caller (which they really should) then this will ensure that the probe is retried later when further devices become available.
Signed-off-by: G, Manjunath Kondaiah <[email protected]> --- Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Grant Likely <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Dilan Lee <[email protected]> Cc: Mark Brown <[email protected]> Cc: Manjunath GKondaiah <[email protected]> Cc: Arnd Bergmann <[email protected]> drivers/gpio/gpiolib.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index a971e3d..9081ef8 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1177,13 +1177,15 @@ int gpio_request(unsigned gpio, const char *label) { struct gpio_desc *desc; struct gpio_chip *chip; - int status = -EINVAL; + int status = -EPROBE_DEFER; unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); - if (!gpio_is_valid(gpio)) + if (!gpio_is_valid(gpio)) { + status = -EINVAL; goto done; + } desc = &gpio_desc[gpio]; chip = desc->chip; if (chip == NULL) -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
