[PATCH] input: misc: max8997: Simplify open coding of a division using up to 64 divisions
flat view
STALE2027d
From: Uwe Kleine-König <hidden>
Date: 2021-03-16 21:19:30
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
The for loop is just a complicate way to express a division. Replace it by the actual division which is both simpler to understand for a human and more efficient for a CPU to calculate. Signed-off-by: Uwe Kleine-König <redacted> --- drivers/input/misc/max8997_haptic.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/input/misc/max8997_haptic.c b/drivers/input/misc/max8997_haptic.c
index c86966ea0f16..6baca94ed424 100644
--- a/drivers/input/misc/max8997_haptic.c
+++ b/drivers/input/misc/max8997_haptic.c@@ -68,12 +68,8 @@ static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip) int i; u8 duty_index = 0; - for (i = 0; i <= 64; i++) { - if (chip->level <= i * 100 / 64) { - duty_index = i; - break; - } - } + duty_index = DIV_ROUNDUP(chip->level * 64, 100); + switch (chip->internal_mode_pattern) { case 0: max8997_write_reg(chip->client,
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2.30.1