linux-kernel - [PATCH 3/6] Input: matrix_keypad - add function for reading row state

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Message-Id: <20241031063004.69956-4-markus.burri@mt.com>
Date: Thu, 31 Oct 2024 07:30:01 +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>,
	linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	Manuel Traut <manuel.traut@...com>,
	HeDong Zhao <hedong.zhao@...com>
Subject: [PATCH 3/6] Input: matrix_keypad - add function for reading row state

Move the evaluation of a row state into separate function.
It will be also used by a change later in this series.

Signed-off-by: Markus Burri <markus.burri@...com>
Reviewed-by: Manuel Traut <manuel.traut@...com>
Tested-by: HeDong Zhao <hedong.zhao@...com>
---
 drivers/input/keyboard/matrix_keypad.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c
index e08d7d5..c091f90 100644
--- a/drivers/input/keyboard/matrix_keypad.c
+++ b/drivers/input/keyboard/matrix_keypad.c
@@ -101,6 +101,16 @@ static void disable_row_irqs(struct matrix_keypad *keypad)
 		disable_irq_nosync(keypad->row_irqs[i]);
 }
 
+static uint32_t read_row_state(struct matrix_keypad *keypad)
+{
+	int row;
+	u32 row_state = 0;
+
+	for (row = 0; row < keypad->num_row_gpios; row++)
+		row_state |= row_asserted(keypad, row) ? BIT(row) : 0;
+	return row_state;
+}
+
 /*
  * This gets the keys from keyboard and reports it to input subsystem
  */
@@ -123,9 +133,7 @@ static void matrix_keypad_scan(struct work_struct *work)
 
 		activate_col(keypad, col, true);
 
-		for (row = 0; row < keypad->num_row_gpios; row++)
-			new_state[col] |=
-				row_asserted(keypad, row) ? BIT(row) : 0;
+		new_state[col] = read_row_state(keypad);
 
 		activate_col(keypad, col, false);
 	}
-- 
2.39.5