From: Heiko Stuebner <he...@sntech.de>

Syscon nodes can be a simple-mfd and the syscon-users then be declared
as children of this node. That way the parent-child structure can be
better represented for devices that are fully embedded in the syscon.

Therefore allow getting the syscon from the parent if neither
a special compatible nor a gpio,syscon-dev property is defined.

Signed-off-by: Heiko Stuebner <he...@sntech.de>
Signed-off-by: Levin Du <d...@t-chip.com.cn>
---

Changes in v2: None
Changes in v1:
- New: allow fetching syscon from parent node in gpio-syscon driver

 drivers/gpio/gpio-syscon.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
index 537cec7..7325b86 100644
--- a/drivers/gpio/gpio-syscon.c
+++ b/drivers/gpio/gpio-syscon.c
@@ -205,6 +205,8 @@ static int syscon_gpio_probe(struct platform_device *pdev)
        } else {
                priv->syscon =
                        syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev");
+               if (IS_ERR(priv->syscon) && np->parent)
+                       priv->syscon = syscon_node_to_regmap(np->parent);
                if (IS_ERR(priv->syscon))
                        return PTR_ERR(priv->syscon);
 
-- 
2.7.4


Reply via email to