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clk: boston: Allow to get regmap from parent device

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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>
This commit is contained in:
Jiaxun Yang
2024-05-17 19:14:57 +01:00
committed by Tom Rini
parent a6661e260c
commit 964bb01f34
1 changed files with 12 additions and 7 deletions
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19
drivers/clk/clk_boston.c
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@@ -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,
};