mfd: syscon: Return -EPROBE_DEFER if the syscon is not found

These days we can register syscons with of_syscon_register_regmap() so
when we can't find the syscon that probably means it hasn't been
registered yet.  Return -EPROBE_DEFER so the driver will try probing
again.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Chen-Yu Tsai <wens@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/aQdHmrchkmOr34r3@stanley.mountain
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index ae71a2710bed8bb6522d8be0624c3941c12715f1..e5d5def594f6e33e7e34fecfd2fb88981b9d55c9 100644 (file)
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -183,7 +183,7 @@ static struct regmap *device_node_get_regmap(struct device_node *np,
                if (create_regmap)
                        syscon = of_syscon_register(np, check_res);
                else
-                       syscon = ERR_PTR(-EINVAL);
+                       syscon = ERR_PTR(-EPROBE_DEFER);
        }
        mutex_unlock(&syscon_list_lock);