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From: Nadav Amit <>
To: Linus Walleij <>
Cc: <>, <>,
	Nadav Amit <>
Subject: [PATCH] gpio: Fix wrong rounding in gpio-menz127
Date: Mon, 4 Jun 2018 06:58:14 -0700	[thread overview]
Message-ID: <> (raw)

men_z127_debounce() tries to round up and down, but uses functions which
are only suitable when the divider is a power of two, which is not the
case. Use the appropriate ones.

Found by static check. Compile tested.

Fixes: f436bc2726c64 ("gpio: add driver for MEN 16Z127 GPIO controller")

Signed-off-by: Nadav Amit <>
 drivers/gpio/gpio-menz127.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
index e1037582e34d..b2635326546e 100644
--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -56,9 +56,9 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
 		rnd = fls(debounce) - 1;
 		if (rnd && (debounce & BIT(rnd - 1)))
-			debounce = round_up(debounce, MEN_Z127_DB_MIN_US);
+			debounce = roundup(debounce, MEN_Z127_DB_MIN_US);
-			debounce = round_down(debounce, MEN_Z127_DB_MIN_US);
+			debounce = rounddown(debounce, MEN_Z127_DB_MIN_US);
 		if (debounce > MEN_Z127_DB_MAX_US)
 			debounce = MEN_Z127_DB_MAX_US;

             reply	other threads:[~2018-06-04 21:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-04 13:58 Nadav Amit [this message]
2018-06-12  8:40 ` [PATCH] gpio: Fix wrong rounding in gpio-menz127 Linus Walleij

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