linux-kernel - [PATCH 3/3] clk: renesas: rzv2h: Simplify rzv2h_cpg_assert()/rzv2h_cpg

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Message-ID: <20250317083213.371614-4-tommaso.merciai.xr@bp.renesas.com>
Date: Mon, 17 Mar 2025 09:32:11 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Pavel Machek <pavel@...x.de>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Magnus Damm <magnus.damm@...il.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] clk: renesas: rzv2h: Simplify rzv2h_cpg_assert()/rzv2h_cpg_deassert()

rzv2h_cpg_assert() and rzv2h_cpg_deassert() functions are similar. Share
this code via __rzv2h_cpg_assert(). This avoid code duplication.

Reported-by: Pavel Machek <pavel@...x.de>
Closes: https://lore.kernel.org/cip-dev/Z9QA9rwuXCuVbOXp@duo.ucw.cz/
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
 drivers/clk/renesas/rzv2h-cpg.c | 34 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 20 deletions(-)

diff --git a/drivers/clk/renesas/rzv2h-cpg.c b/drivers/clk/renesas/rzv2h-cpg.c
index bf3ccc0522d5..691bfe37ec1b 100644
--- a/drivers/clk/renesas/rzv2h-cpg.c
+++ b/drivers/clk/renesas/rzv2h-cpg.c
@@ -652,16 +652,17 @@ rzv2h_cpg_register_mod_clk(const struct rzv2h_mod_clk *mod,
 		mod->name, PTR_ERR(clk));
 }
 
-static int rzv2h_cpg_assert(struct reset_controller_dev *rcdev,
-			    unsigned long id)
+static int __rzv2h_cpg_assert(struct reset_controller_dev *rcdev,
+			      unsigned long id, bool assert)
 {
 	struct rzv2h_cpg_priv *priv = rcdev_to_priv(rcdev);
 	unsigned int reg = GET_RST_OFFSET(priv->resets[id].reset_index);
 	u32 mask = BIT(priv->resets[id].reset_bit);
 	u8 monbit = priv->resets[id].mon_bit;
-	u32 value = mask << 16;
+	u32 value = assert ? (mask << 16) : ((mask << 16) | mask);
 
-	dev_dbg(rcdev->dev, "assert id:%ld offset:0x%x\n", id, reg);
+	dev_dbg(rcdev->dev, "%s id:%ld offset:0x%x\n",
+		assert ? "assert" : "deassert", id, reg);
 
 	writel(value, priv->base + reg);
 
@@ -669,27 +670,20 @@ static int rzv2h_cpg_assert(struct reset_controller_dev *rcdev,
 	mask = BIT(monbit);
 
 	return readl_poll_timeout_atomic(priv->base + reg, value,
-					 value & mask, 10, 200);
+					 assert ? (value & mask) : !(value & mask),
+					 10, 200);
+}
+
+static int rzv2h_cpg_assert(struct reset_controller_dev *rcdev,
+			    unsigned long id)
+{
+	return __rzv2h_cpg_assert(rcdev, id, true);
 }
 
 static int rzv2h_cpg_deassert(struct reset_controller_dev *rcdev,
 			      unsigned long id)
 {
-	struct rzv2h_cpg_priv *priv = rcdev_to_priv(rcdev);
-	unsigned int reg = GET_RST_OFFSET(priv->resets[id].reset_index);
-	u32 mask = BIT(priv->resets[id].reset_bit);
-	u8 monbit = priv->resets[id].mon_bit;
-	u32 value = (mask << 16) | mask;
-
-	dev_dbg(rcdev->dev, "deassert id:%ld offset:0x%x\n", id, reg);
-
-	writel(value, priv->base + reg);
-
-	reg = GET_RST_MON_OFFSET(priv->resets[id].mon_index);
-	mask = BIT(monbit);
-
-	return readl_poll_timeout_atomic(priv->base + reg, value,
-					 !(value & mask), 10, 200);
+	return __rzv2h_cpg_assert(rcdev, id, false);
 }
 
 static int rzv2h_cpg_reset(struct reset_controller_dev *rcdev,
-- 
2.43.0