linux-kernel - [PATCH 7/8] clk: x86: cgu: convert from round_rate() to determine

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Message-Id: <20250828-clk-round-rate-v2-v1-7-b97ec8ba6cc4@redhat.com>
Date: Thu, 28 Aug 2025 20:38:26 -0400
From: Brian Masney <bmasney@...hat.com>
To: Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Vladimir Zapolskiy <vz@...ia.com>, 
 Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>, 
 Chen Wang <unicorn_wang@...look.com>, Inochi Amaoto <inochiama@...il.com>, 
 Michal Simek <michal.simek@....com>, Bjorn Andersson <andersson@...nel.org>, 
 Heiko Stuebner <heiko@...ech.de>, 
 Andrea della Porta <andrea.porta@...e.com>, 
 Maxime Ripard <mripard@...nel.org>
Cc: linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, sophgo@...ts.linux.dev, 
 linux-arm-msm@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
 Brian Masney <bmasney@...hat.com>
Subject: [PATCH 7/8] clk: x86: cgu: 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.

Signed-off-by: Brian Masney <bmasney@...hat.com>
---
 drivers/clk/x86/clk-cgu.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/drivers/clk/x86/clk-cgu.c b/drivers/clk/x86/clk-cgu.c
index 89b53f280aee03b7838e4656eae3571f00eaa263..d099667355f8d80785b0f43097ad10c274dd61ea 100644
--- a/drivers/clk/x86/clk-cgu.c
+++ b/drivers/clk/x86/clk-cgu.c
@@ -132,14 +132,15 @@ lgm_clk_divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
 				   divider->flags, divider->width);
 }
 
-static long
-lgm_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
-			   unsigned long *prate)
+static int lgm_clk_divider_determine_rate(struct clk_hw *hw,
+					  struct clk_rate_request *req)
 {
 	struct lgm_clk_divider *divider = to_lgm_clk_divider(hw);
 
-	return divider_round_rate(hw, rate, prate, divider->table,
-				  divider->width, divider->flags);
+	req->rate = divider_round_rate(hw, req->rate, &req->best_parent_rate, divider->table,
+				       divider->width, divider->flags);
+
+	return 0;
 }
 
 static int
@@ -182,7 +183,7 @@ static void lgm_clk_divider_disable(struct clk_hw *hw)
 
 static const struct clk_ops lgm_clk_divider_ops = {
 	.recalc_rate = lgm_clk_divider_recalc_rate,
-	.round_rate = lgm_clk_divider_round_rate,
+	.determine_rate = lgm_clk_divider_determine_rate,
 	.set_rate = lgm_clk_divider_set_rate,
 	.enable = lgm_clk_divider_enable,
 	.disable = lgm_clk_divider_disable,
@@ -487,15 +488,14 @@ lgm_clk_ddiv_set_rate(struct clk_hw *hw, unsigned long rate,
 	return 0;
 }
 
-static long
-lgm_clk_ddiv_round_rate(struct clk_hw *hw, unsigned long rate,
-			unsigned long *prate)
+static int lgm_clk_ddiv_determine_rate(struct clk_hw *hw,
+				       struct clk_rate_request *req)
 {
 	struct lgm_clk_ddiv *ddiv = to_lgm_clk_ddiv(hw);
 	u32 div, ddiv1, ddiv2;
 	u64 rate64;
 
-	div = DIV_ROUND_CLOSEST_ULL((u64)*prate, rate);
+	div = DIV_ROUND_CLOSEST_ULL((u64)req->best_parent_rate, req->rate);
 
 	/* if predivide bit is enabled, modify div by factor of 2.5 */
 	if (lgm_get_clk_val(ddiv->membase, ddiv->reg, ddiv->shift2, 1)) {
@@ -503,14 +503,17 @@ lgm_clk_ddiv_round_rate(struct clk_hw *hw, unsigned long rate,
 		div = DIV_ROUND_CLOSEST_ULL((u64)div, 5);
 	}
 
-	if (div <= 0)
-		return *prate;
+	if (div <= 0) {
+		req->rate = req->best_parent_rate;
+
+		return 0;
+	}
 
 	if (lgm_clk_get_ddiv_val(div, &ddiv1, &ddiv2) != 0)
 		if (lgm_clk_get_ddiv_val(div + 1, &ddiv1, &ddiv2) != 0)
 			return -EINVAL;
 
-	rate64 = *prate;
+	rate64 = req->best_parent_rate;
 	do_div(rate64, ddiv1);
 	do_div(rate64, ddiv2);
 
@@ -520,7 +523,9 @@ lgm_clk_ddiv_round_rate(struct clk_hw *hw, unsigned long rate,
 		rate64 = DIV_ROUND_CLOSEST_ULL(rate64, 5);
 	}
 
-	return rate64;
+	req->rate = rate64;
+
+	return 0;
 }
 
 static const struct clk_ops lgm_clk_ddiv_ops = {
@@ -528,7 +533,7 @@ static const struct clk_ops lgm_clk_ddiv_ops = {
 	.enable	= lgm_clk_ddiv_enable,
 	.disable = lgm_clk_ddiv_disable,
 	.set_rate = lgm_clk_ddiv_set_rate,
-	.round_rate = lgm_clk_ddiv_round_rate,
+	.determine_rate = lgm_clk_ddiv_determine_rate,
 };
 
 int lgm_clk_register_ddiv(struct lgm_clk_provider *ctx,

-- 
2.50.1