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power: supply: ltc2941: simplify Qlsb calculation

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Replace two divisions with a subtraction+shift for a small code size
improvement and less brackets.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Michał Mirosław 2022-01-11 03:32:40 +01:00 committed by Sebastian Reichel
parent 8f5b373960
commit cf215c37f5
1 changed files with 4 additions and 4 deletions
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8
drivers/power/supply/ltc2941-battery-gauge.c
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@ -490,13 +490,13 @@ static int ltc294x_i2c_probe(struct i2c_client *client,
if (info->id == LTC2943_ID) {
if (prescaler_exp > LTC2943_MAX_PRESCALER_EXP)
prescaler_exp = LTC2943_MAX_PRESCALER_EXP;
info->Qlsb = ((340 * 50000) / r_sense) /
(4096 / (1 << (2*prescaler_exp)));
info->Qlsb = ((340 * 50000) / r_sense) >>
(12 - 2*prescaler_exp);
} else {
if (prescaler_exp > LTC2941_MAX_PRESCALER_EXP)
prescaler_exp = LTC2941_MAX_PRESCALER_EXP;
info->Qlsb = ((85 * 50000) / r_sense) /
(128 / (1 << prescaler_exp));
info->Qlsb = ((85 * 50000) / r_sense) >>
(7 - prescaler_exp);
}
/* Read status register to check for LTC2942 */