[1/3] clk: make determine_rate optional for non reparenting clocks

Commit Message

Sascha Hauer April 8, 2025, noon UTC

With 326cc42f9fdc ("clk: Forbid to register a mux without determine_rate")
it became mandatory to provide a determine_rate hook once a set_parent
hook is provided. The determine_rate hook is only needed though when the
clock reparents to set its rate. Clocks which do not reparent during
set_rate do not need a determine_rate hook, so make the hook optional
for clocks with the CLK_SET_RATE_NO_REPARENT flag.

Signed-off-by: Sascha Hauer <[e-mail]>
---
 drivers/clk/clk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 0565c87656cf5..07ae3652df6c1 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3937,7 +3937,8 @@  static int __clk_core_init(struct clk_core *core)
 		goto out;
 	}
 
-	if (core->ops->set_parent && !core->ops->determine_rate) {
+	if (!(core->flags & CLK_SET_RATE_NO_REPARENT) &&
+	    core->ops->set_parent && !core->ops->determine_rate) {
 		pr_err("%s: %s must implement .set_parent & .determine_rate\n",
 			__func__, core->name);
 		ret = -EINVAL;