linux-kernel - [PATCH v2 1/3] HID: apple: Refactor key translation setup

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Date:   Tue,  8 Feb 2022 19:37:02 +0100
From:   José Expósito <jose.exposito89@...il.com>
To:     jikos@...nel.org
Cc:     benjamin.tissoires@...hat.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        José Expósito <jose.exposito89@...il.com>
Subject: [PATCH v2 1/3] HID: apple: Refactor key translation setup

The code used to map the apple_key_translation structs is duplicated.
Extract it to a common function.

Refactor, no functional changes.

Signed-off-by: José Expósito <jose.exposito89@...il.com>
---
 drivers/hid/hid-apple.c | 38 +++++++++++++++++---------------------
 1 file changed, 17 insertions(+), 21 deletions(-)

diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c
index 24802a4a636e..6ca393c0a390 100644
--- a/drivers/hid/hid-apple.c
+++ b/drivers/hid/hid-apple.c
@@ -202,6 +202,15 @@ static const struct apple_key_translation swapped_fn_leftctrl_keys[] = {
 	{ }
 };
 
+static inline void apple_setup_key_translation(struct input_dev *input,
+		const struct apple_key_translation *table)
+{
+	const struct apple_key_translation *trans;
+
+	for (trans = table; trans->from; trans++)
+		set_bit(trans->to, input->keybit);
+}
+
 static const struct apple_key_translation *apple_find_translation(
 		const struct apple_key_translation *table, u16 from)
 {
@@ -452,30 +461,17 @@ static __u8 *apple_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 
 static void apple_setup_input(struct input_dev *input)
 {
-	const struct apple_key_translation *trans;
-
 	set_bit(KEY_NUMLOCK, input->keybit);
 
 	/* Enable all needed keys */
-	for (trans = apple_fn_keys; trans->from; trans++)
-		set_bit(trans->to, input->keybit);
-
-	for (trans = powerbook_fn_keys; trans->from; trans++)
-		set_bit(trans->to, input->keybit);
-
-	for (trans = powerbook_numlock_keys; trans->from; trans++)
-		set_bit(trans->to, input->keybit);
-
-	for (trans = apple_iso_keyboard; trans->from; trans++)
-		set_bit(trans->to, input->keybit);
-
-	for (trans = apple2021_fn_keys; trans->from; trans++)
-		set_bit(trans->to, input->keybit);
-
-	if (swap_fn_leftctrl) {
-		for (trans = swapped_fn_leftctrl_keys; trans->from; trans++)
-			set_bit(trans->to, input->keybit);
-	}
+	apple_setup_key_translation(input, apple_fn_keys);
+	apple_setup_key_translation(input, powerbook_fn_keys);
+	apple_setup_key_translation(input, powerbook_numlock_keys);
+	apple_setup_key_translation(input, apple_iso_keyboard);
+	apple_setup_key_translation(input, apple2021_fn_keys);
+
+	if (swap_fn_leftctrl)
+		apple_setup_key_translation(input, swapped_fn_leftctrl_keys);
 }
 
 static int apple_input_mapping(struct hid_device *hdev, struct hid_input *hi,
-- 
2.25.1