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 --- v2: Move syscon_get_regmap to probe v3: Move syscon detection code to probe to ensure parent is probbed before syscon_get_regmap. --- drivers/clk/clk_boston.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/clk/clk_boston.c b/drivers/clk/clk_boston.c index 030ff7cc58ec..71e030f463e1 100644 --- a/drivers/clk/clk_boston.c +++ b/drivers/clk/clk_boston.c @@ -58,17 +58,21 @@ const struct clk_ops clk_boston_ops = { .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 @@ U_BOOT_DRIVER(clk_boston) = { .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, };