linux-kernel - [PATCH 08/19] clk: divider: check divider validity for CLK_DIVIDER_EVEN

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Message-Id: <20250903-clk-eyeq7-v1-8-3f5024b5d6e2@bootlin.com>
Date: Wed, 03 Sep 2025 14:47:15 +0200
From: Benoît Monin <benoit.monin@...tlin.com>
To: Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>, 
 Gregory CLEMENT <gregory.clement@...tlin.com>, 
 Théo Lebrun <theo.lebrun@...tlin.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 linux-mips@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org, 
 Tawfik Bayouk <tawfik.bayouk@...ileye.com>, 
 Sari Khoury <sari.khoury@...ileye.com>, 
 Benoît Monin <benoit.monin@...tlin.com>
Subject: [PATCH 08/19] clk: divider: check divider validity for
 CLK_DIVIDER_EVEN_INTEGERS

Ensure that the divider is even when the flag CLK_DIVIDER_EVEN_INTEGERS
is set, similar to the power of two check for CLK_DIVIDER_POWER_OF_TWO.

Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>
Signed-off-by: Benoît Monin <benoit.monin@...tlin.com>
---
 drivers/clk/clk-divider.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index c1f426b8a5043cb5a1de08e1da385928ec54a2ed..8e8f87024e76625f348f1d66c15a7a938fa0c4db 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -181,6 +181,8 @@ static bool _is_valid_div(const struct clk_div_table *table, unsigned int div,
 {
 	if (flags & CLK_DIVIDER_POWER_OF_TWO)
 		return is_power_of_2(div);
+	if (flags & CLK_DIVIDER_EVEN_INTEGERS)
+		return (div % 2) == 0;
 	if (table)
 		return _is_valid_table_div(table, div);
 	return true;

-- 
2.51.0