linux-kernel - [PATCH v3 1/7] Input: matrix_keypad - use fsleep for variable delay duration

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Message-Id: <20250107135659.185293-2-markus.burri@mt.com>
Date: Tue,  7 Jan 2025 14:56:53 +0100
From: Markus Burri <markus.burri@...com>
To: linux-kernel@...r.kernel.org
Cc: Markus Burri <markus.burri@...com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Marek Vasut <marek.vasut@...il.com>,
	linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	Manuel Traut <manuel.traut@...com>
Subject: [PATCH v3 1/7] Input: matrix_keypad - use fsleep for variable delay duration

The delay is retrieved from a device-tree property, so the duration is
variable. fsleep guesses the best delay function based on duration.

Link: https://www.kernel.org/doc/html/latest/timers/timers-howto.html

Signed-off-by: Markus Burri <markus.burri@...com>

---
 drivers/input/keyboard/matrix_keypad.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c
index 2a3b3bf..5571d2e 100644
--- a/drivers/input/keyboard/matrix_keypad.c
+++ b/drivers/input/keyboard/matrix_keypad.c
@@ -68,7 +68,7 @@ static void activate_col(struct matrix_keypad *keypad, int col, bool on)
 	__activate_col(keypad, col, on);
 
 	if (on && keypad->col_scan_delay_us)
-		udelay(keypad->col_scan_delay_us);
+		fsleep(keypad->col_scan_delay_us);
 }
 
 static void activate_all_cols(struct matrix_keypad *keypad, bool on)
-- 
2.39.5