From: Brian Masney <bmasney@redhat.com>
Date: Mon, 11 Aug 2025 15:17:55 +0000 (-0400)
Subject: clk: fixed-factor: add determine_rate() ops
X-Git-Tag: v6.18-rc1~50^2^2~2^2~109
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=582de809b052892e1338508374f562e823b29566;p=thirdparty%2Fkernel%2Flinux.git

clk: fixed-factor: add determine_rate() ops

The round_rate() clk ops is deprecated, and determine_rate() should be
used instead. We can't just simply convert this driver over initially
since other drivers depend on this. So let's go ahead and add a
determine_rate() clk ops. Once all of the drivers have been converted,
then the round_rate() clk ops can be dropped.

Signed-off-by: Brian Masney <bmasney@redhat.com>
---

diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
index e62ae8794d44..79b9a8c57d4b 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -30,6 +30,23 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
 	return (unsigned long)rate;
 }
 
+static int clk_factor_determine_rate(struct clk_hw *hw,
+				     struct clk_rate_request *req)
+{
+	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
+
+	if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
+		unsigned long best_parent;
+
+		best_parent = (req->rate / fix->mult) * fix->div;
+		req->best_parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
+	}
+
+	req->rate = (req->best_parent_rate / fix->div) * fix->mult;
+
+	return 0;
+}
+
 static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
 				unsigned long *prate)
 {
@@ -50,7 +67,7 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
 {
 	/*
 	 * We must report success but we can do so unconditionally because
-	 * clk_factor_round_rate returns values that ensure this call is a
+	 * clk_factor_determine_rate returns values that ensure this call is a
 	 * nop.
 	 */
 
@@ -69,6 +86,7 @@ static unsigned long clk_factor_recalc_accuracy(struct clk_hw *hw,
 }
 
 const struct clk_ops clk_fixed_factor_ops = {
+	.determine_rate = clk_factor_determine_rate,
 	.round_rate = clk_factor_round_rate,
 	.set_rate = clk_factor_set_rate,
 	.recalc_rate = clk_factor_recalc_rate,