reset: allow drivers to request probe deferral

If the requested reset controller is not yet available, have reset_control_get
and device_reset return -EPROBE_DEFER so the driver can decide to request
probe deferral.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Stephen Warren <swarren@nvidia.com>

diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index d1b6089a0ef82f57c9aece8b86168a336710b70d..b3d99a1477b52cb4a7aa41d8e5041e20cf7a7a8a 100644 (file)
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -167,7 +167,7 @@ struct reset_control *reset_control_get(struct device *dev, const char *id)
 
        if (!rcdev) {
                mutex_unlock(&reset_controller_list_mutex);
-               return ERR_PTR(-ENODEV);
+               return ERR_PTR(-EPROBE_DEFER);
        }
 
        rstc_id = rcdev->of_xlate(rcdev, &args);