clk: imx: scu: convert from round_rate() to determine_rate()

The round_rate() clk ops is deprecated, so migrate this driver from
round_rate() to determine_rate() using the Coccinelle semantic patch
on the cover letter of this series.

This driver also implements both the determine_rate() and round_rate()
clk ops, and the round_rate() clk ops is deprecated. When both are
defined, clk_core_determine_round_nolock() from the clk core will only
use the determine_rate() clk ops, so let's remove the round_rate() clk
ops since it's unused.

Signed-off-by: Brian Masney <bmasney@redhat.com>
Link: https://lore.kernel.org/r/20250710-clk-imx-round-rate-v1-13-5726f98e6d8d@redhat.com
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: masneyb

drivers/clk/imx/clk-scu.c

@@ -269,24 +269,6 @@ static int clk_scu_determine_rate(struct clk_hw *hw,
 	return 0;
 }
 
-/*
- * clk_scu_round_rate - Round clock rate for a SCU clock
- * @hw: clock to round rate for
- * @rate: rate to round
- * @parent_rate: parent rate provided by common clock framework, not used
- *
- * Returns the current clock rate, or zero in failure.
- */
-static long clk_scu_round_rate(struct clk_hw *hw, unsigned long rate,
-			       unsigned long *parent_rate)
-{
-	/*
-	 * Assume we support all the requested rate and let the SCU firmware
-	 * to handle the left work
-	 */
-	return rate;
-}
-
 static int clk_scu_atf_set_cpu_rate(struct clk_hw *hw, unsigned long rate,
 				    unsigned long parent_rate)
 {
@@ -454,15 +436,15 @@ static const struct clk_ops clk_scu_ops = {
 
 static const struct clk_ops clk_scu_cpu_ops = {
 	.recalc_rate = clk_scu_recalc_rate,
-	.round_rate = clk_scu_round_rate,
+	.determine_rate = clk_scu_determine_rate,
 	.set_rate = clk_scu_atf_set_cpu_rate,
 	.prepare = clk_scu_prepare,
 	.unprepare = clk_scu_unprepare,
 };
 
 static const struct clk_ops clk_scu_pi_ops = {
 	.recalc_rate = clk_scu_recalc_rate,
-	.round_rate  = clk_scu_round_rate,
+	.determine_rate = clk_scu_determine_rate,
 	.set_rate    = clk_scu_set_rate,
 };
 
@@ -766,15 +748,15 @@ static unsigned long clk_gpr_div_scu_recalc_rate(struct clk_hw *hw,
 	return err ? 0 : rate;
 }
 
-static long clk_gpr_div_scu_round_rate(struct clk_hw *hw, unsigned long rate,
-				   unsigned long *prate)
+static int clk_gpr_div_scu_determine_rate(struct clk_hw *hw,
+					  struct clk_rate_request *req)
 {
-	if (rate < *prate)
-		rate = *prate / 2;
+	if (req->rate < req->best_parent_rate)
+		req->rate = req->best_parent_rate / 2;
 	else
-		rate = *prate;
+		req->rate = req->best_parent_rate;
 
-	return rate;
+	return 0;
 }
 
 static int clk_gpr_div_scu_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -793,7 +775,7 @@ static int clk_gpr_div_scu_set_rate(struct clk_hw *hw, unsigned long rate,
 
 static const struct clk_ops clk_gpr_div_scu_ops = {
 	.recalc_rate = clk_gpr_div_scu_recalc_rate,
-	.round_rate = clk_gpr_div_scu_round_rate,
+	.determine_rate = clk_gpr_div_scu_determine_rate,
 	.set_rate = clk_gpr_div_scu_set_rate,
 };