clk: boston: Allow to get regmap from parent device
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@flygoat.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/drivers/clk/clk_boston.c b/drivers/clk/clk_boston.c
index 030ff7c..71e030f 100644
--- a/drivers/clk/clk_boston.c
+++ b/drivers/clk/clk_boston.c
@@ -58,17 +58,21 @@
.get_rate = clk_boston_get_rate,
};
-static int clk_boston_of_to_plat(struct udevice *dev)
+static int clk_boston_probe(struct udevice *dev)
{
struct clk_boston *state = dev_get_plat(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 (dev->parent && 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);
@@ -91,7 +95,8 @@
.name = "boston_clock",
.id = UCLASS_CLK,
.of_match = clk_boston_match,
- .of_to_plat = clk_boston_of_to_plat,
+ .probe = clk_boston_probe,
.plat_auto = sizeof(struct clk_boston),
.ops = &clk_boston_ops,
+ .flags = DM_FLAG_PRE_RELOC,
};