mfd: syscon: Allow property as NULL in syscon_regmap_lookup_by_phandle

If we pass syscon device node itself as first parameter to this function
there is no need to parse and find syscon device node. So by allowing
"property" parameter as NULL allow syscon_regmap_lookup_by_phandle to
consider passed argument "np" itself as a syscon device node "syscon_np".
This will help us in avoiding addition of "syscon" property in a device node
which points back to same device node in device tree.

Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index dbea55de4397d5055da2b3fe39283fa36abea1f1..b30f94179f4ed6c623c4f4ca400d110a50814d99 100644 (file)
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -94,7 +94,11 @@ struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
        struct device_node *syscon_np;
        struct regmap *regmap;
 
-       syscon_np = of_parse_phandle(np, property, 0);
+       if (property)
+               syscon_np = of_parse_phandle(np, property, 0);
+       else
+               syscon_np = np;
+
        if (!syscon_np)
                return ERR_PTR(-ENODEV);