From 862e0773f130d21a65c991f493b01f4ec040e821 Mon Sep 17 00:00:00 2001
From: Brian Masney <bmasney@redhat.com>
Date: Tue, 5 May 2026 20:48:58 -0400
Subject: [PATCH] clk: add clk_determine_rate_noop()

Add a new helper clk_determine_rate_noop() that's for clocks where the
rate rounding is handled by the firmware/hardware, or the clock is
capable of any rate. The requested rate is passed through unchanged,
and the actual rate will be learned via recalc_rate() after the rate
is set.

This shared helper will be used to get rid of the driver-specific empty
determine rate implementations that are present in the tree.

Signed-off-by: Brian Masney <bmasney@redhat.com>
---
 drivers/clk/clk.c            | 18 ++++++++++++++++++
 include/linux/clk-provider.h |  1 +
 2 files changed, 19 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index f97a7cecb200..fef87167a60b 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -933,6 +933,24 @@ int clk_hw_determine_rate_no_reparent(struct clk_hw *hw,
 }
 EXPORT_SYMBOL_GPL(clk_hw_determine_rate_no_reparent);
 
+/**
+ * clk_determine_rate_noop - clk_ops::determine_rate noop implementation
+ * @hw: clk to determine rate on
+ * @req: rate request
+ *
+ * Noop determine rate for clocks where the rate rounding is handled by the
+ * firmware/hardware, or the clock is capable of any rate. The requested rate is
+ * passed through unchanged, and the actual rate will be learned via
+ * recalc_rate() after the rate is set.
+ *
+ * Returns: 0 always
+ */
+int clk_determine_rate_noop(struct clk_hw *hw, struct clk_rate_request *req)
+{
+	return 0;
+}
+EXPORT_SYMBOL_GPL(clk_determine_rate_noop);
+
 /***        clk api        ***/
 
 static void clk_core_rate_unprotect(struct clk_core *core)
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index a2348b961538..9d32e4a16eb8 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -1472,6 +1472,7 @@ int clk_mux_determine_rate_flags(struct clk_hw *hw,
 				 unsigned long flags);
 int clk_hw_determine_rate_no_reparent(struct clk_hw *hw,
 				      struct clk_rate_request *req);
+int clk_determine_rate_noop(struct clk_hw *hw, struct clk_rate_request *req);
 void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
 void clk_hw_get_rate_range(struct clk_hw *hw, unsigned long *min_rate,
 			   unsigned long *max_rate);