[PATCH 10/13] clk: boston: Allow to get regmap from parent device

[Jiaxun Yang]

In upstream devicetree, clk_boston is a child of syscon node
and there is no "regmap" property for clk_boston node.

Try to check parent device first to look for syscon.

Signed-off-by: Jiaxun Yang <jiaxun.yang at flygoat.com>
---
 drivers/clk/clk_boston.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk_boston.c b/drivers/clk/clk_boston.c
index 030ff7cc58ec..2e584ed867d5 100644
--- a/drivers/clk/clk_boston.c
+++ b/drivers/clk/clk_boston.c
@@ -64,11 +64,15 @@ static int clk_boston_of_to_plat(struct udevice *dev)
 	struct udevice *syscon;
 	int err;
 
-	err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
-					   "regmap", &syscon);
-	if (err) {
-		pr_err("unable to find syscon device\n");
-		return err;
+	if (device_get_uclass_id(dev->parent) == UCLASS_SYSCON) {
+		syscon = dev->parent;
+	} else {
+		err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
+						   "regmap", &syscon);
+		if (err) {
+			pr_err("unable to find syscon device\n");
+			return err;
+		}
 	}
 
 	state->regmap = syscon_get_regmap(syscon);
@@ -94,4 +98,5 @@ U_BOOT_DRIVER(clk_boston) = {
 	.of_to_plat = clk_boston_of_to_plat,
 	.plat_auto	= sizeof(struct clk_boston),
 	.ops = &clk_boston_ops,
+	.flags = DM_FLAG_PRE_RELOC,
 };

-- 
2.34.1