[PATCH v2 4/5] mfd: rn5t618: register power off callback optionally

[Stefan Agner]

Only register power off if the PMIC is defined as system power
controller (see Documentation/devicetree/bindings/power/
power-controller.txt).

Reviewed-by: Marcel Ziswiler <marcel.ziswi...@toradex.com>
Signed-off-by: Stefan Agner <ste...@agner.ch>
---
 drivers/mfd/rn5t618.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
index 7607ced..d9b4d40 100644
--- a/drivers/mfd/rn5t618.c
+++ b/drivers/mfd/rn5t618.c
@@ -103,9 +103,13 @@ static int rn5t618_i2c_probe(struct i2c_client *i2c,
                return ret;
        }
 
-       if (!pm_power_off) {
-               rn5t618_pm_power_off = priv;
-               pm_power_off = rn5t618_power_off;
+       if (of_device_is_system_power_controller(i2c->dev.of_node)) {
+               if (!pm_power_off) {
+                       rn5t618_pm_power_off = priv;
+                       pm_power_off = rn5t618_power_off;
+               } else {
+                       dev_err(&i2c->dev, "Failed to set poweroff capability, 
already defined\n");
+               }
        }
 
        return 0;
-- 
2.8.3