linux-kernel - [PATCH] mfd: mc13xxx: Use bitfield helpers

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Date:   Mon, 22 Nov 2021 16:54:07 +0100
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] mfd: mc13xxx: Use bitfield helpers

Use the FIELD_GET() helper, instead of defining a custom macro
implementing the same operation.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
Compile-tested only.

See "[PATCH 00/17] Non-const bitfield helper conversions"
(https://lore.kernel.org/r/cover.1637592133.git.geert+renesas@glider.be)
for background and more conversions.
---
 drivers/mfd/mc13xxx-core.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 8a4f1d90dcfd1c33..a9b7cf23c9079882 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -7,6 +7,7 @@
  * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@...gutronix.de>
  */
 
+#include <linux/bitfield.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -174,28 +175,27 @@ int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
 }
 EXPORT_SYMBOL(mc13xxx_irq_free);
 
-#define maskval(reg, mask)	(((reg) & (mask)) >> __ffs(mask))
 static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
 {
 	dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
 			"fin: %d, fab: %d, icid: %d/%d\n",
 			mc13xxx->variant->name,
-			maskval(revision, MC13XXX_REVISION_REVFULL),
-			maskval(revision, MC13XXX_REVISION_REVMETAL),
-			maskval(revision, MC13XXX_REVISION_FIN),
-			maskval(revision, MC13XXX_REVISION_FAB),
-			maskval(revision, MC13XXX_REVISION_ICID),
-			maskval(revision, MC13XXX_REVISION_ICIDCODE));
+			FIELD_GET(MC13XXX_REVISION_REVFULL, revision),
+			FIELD_GET(MC13XXX_REVISION_REVMETAL, revision),
+			FIELD_GET(MC13XXX_REVISION_FIN, revision),
+			FIELD_GET(MC13XXX_REVISION_FAB, revision),
+			FIELD_GET(MC13XXX_REVISION_ICID, revision),
+			FIELD_GET(MC13XXX_REVISION_ICIDCODE, revision));
 }
 
 static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
 {
 	dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n",
 			mc13xxx->variant->name,
-			maskval(revision, MC34708_REVISION_REVFULL),
-			maskval(revision, MC34708_REVISION_REVMETAL),
-			maskval(revision, MC34708_REVISION_FIN),
-			maskval(revision, MC34708_REVISION_FAB));
+			FIELD_GET(MC34708_REVISION_REVFULL, revision),
+			FIELD_GET(MC34708_REVISION_REVMETAL, revision),
+			FIELD_GET(MC34708_REVISION_FIN, revision),
+			FIELD_GET(MC34708_REVISION_FAB, revision));
 }
 
 /* These are only exported for mc13xxx-i2c and mc13xxx-spi */
-- 
2.25.1