linux-kernel - [PATCH/RFC 08/17] iio: humidity: hts221: Use bitfield helpers

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Message-Id: <c906f7449c0210cefba53eab2c2d87105d5c8599.1637592133.git.geert+renesas@glider.be>
Date:   Mon, 22 Nov 2021 16:54:01 +0100
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Tony Lindgren <tony@...mide.com>,
        Russell King <linux@...linux.org.uk>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Paul Walmsley <paul@...an.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Tero Kristo <kristo@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Benoit Parrot <bparrot@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andrew Jeffery <andrew@...id.au>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Keerthy <j-keerthy@...com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-media@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-aspeed@...ts.ozlabs.org, openbmc@...ts.ozlabs.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-pm@...r.kernel.org,
        alsa-devel@...a-project.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH/RFC 08/17] iio: humidity: hts221: Use bitfield helpers

Use the field_prep() helper, instead of open-coding the same operation.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
Compile-tested only.
Marked RFC, as this depends on [PATCH 01/17], but follows a different
path to upstream.
---
 drivers/iio/humidity/hts221_core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c
index 6a39615b696114cd..749aedc469ede5c1 100644
--- a/drivers/iio/humidity/hts221_core.c
+++ b/drivers/iio/humidity/hts221_core.c
@@ -7,6 +7,7 @@
  * Lorenzo Bianconi <lorenzo.bianconi@...com>
  */
 
+#include <linux/bitfield.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/device.h>
@@ -171,7 +172,7 @@ static int hts221_update_avg(struct hts221_hw *hw,
 			     u16 val)
 {
 	const struct hts221_avg *avg = &hts221_avg_list[type];
-	int i, err, data;
+	int i, err;
 
 	for (i = 0; i < HTS221_AVG_DEPTH; i++)
 		if (avg->avg_avl[i] == val)
@@ -180,9 +181,8 @@ static int hts221_update_avg(struct hts221_hw *hw,
 	if (i == HTS221_AVG_DEPTH)
 		return -EINVAL;
 
-	data = ((i << __ffs(avg->mask)) & avg->mask);
-	err = regmap_update_bits(hw->regmap, avg->addr,
-				 avg->mask, data);
+	err = regmap_update_bits(hw->regmap, avg->addr, avg->mask,
+				 field_prep(avg->mask, i));
 	if (err < 0)
 		return err;
 
-- 
2.25.1