[PATCH v4 12/13] fsi: i2cr: Replace open-coded parity calculation with parity_odd()

[Kuan-Wei Chiu]

Refactor parity calculations to use the standard parity_odd() helper.
This change eliminates redundant implementations.

Co-developed-by: Yu-Chun Lin <eleanor15x@xxxxxxxxx>
Signed-off-by: Yu-Chun Lin <eleanor15x@xxxxxxxxx>
Signed-off-by: Kuan-Wei Chiu <visitorckw@xxxxxxxxx>
---
 drivers/fsi/fsi-master-i2cr.c | 20 +++-----------------
 1 file changed, 3 insertions(+), 17 deletions(-)

diff --git a/drivers/fsi/fsi-master-i2cr.c b/drivers/fsi/fsi-master-i2cr.c
index 40f1f4d231e5..692d73e892e3 100644
--- a/drivers/fsi/fsi-master-i2cr.c
+++ b/drivers/fsi/fsi-master-i2cr.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright (C) IBM Corporation 2023 */
 
+#include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/fsi.h>
 #include <linux/i2c.h>
@@ -38,27 +39,12 @@ static const u8 i2cr_cfam[] = {
 
 static bool i2cr_check_parity32(u32 v, bool parity)
 {
-	u32 i;
-
-	for (i = 0; i < 32; ++i) {
-		if (v & (1u << i))
-			parity = !parity;
-	}
-
-	return parity;
+	return parity != parity_odd(v);
 }
 
 static bool i2cr_check_parity64(u64 v)
 {
-	u32 i;
-	bool parity = I2CR_INITIAL_PARITY;
-
-	for (i = 0; i < 64; ++i) {
-		if (v & (1llu << i))
-			parity = !parity;
-	}
-
-	return parity;
+	return parity_odd(v) != I2CR_INITIAL_PARITY;
 }
 
 static u32 i2cr_get_command(u32 address, bool parity)
-- 
2.34.1