From: Michał Mirosław Date: Tue, 11 Jan 2022 02:32:40 +0000 (+0100) Subject: power: supply: ltc2941: simplify Qlsb calculation X-Git-Tag: v5.18-rc1~113^2~35 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf215c37f581c4afd6a4880eeb9f4ac70d000c32;p=thirdparty%2Fkernel%2Flinux.git power: supply: ltc2941: simplify Qlsb calculation Replace two divisions with a subtraction+shift for a small code size improvement and less brackets. Signed-off-by: Michał Mirosław Signed-off-by: Sebastian Reichel --- diff --git a/drivers/power/supply/ltc2941-battery-gauge.c b/drivers/power/supply/ltc2941-battery-gauge.c index 09f3e78af4e01..c0cbf4cd59ee0 100644 --- a/drivers/power/supply/ltc2941-battery-gauge.c +++ b/drivers/power/supply/ltc2941-battery-gauge.c @@ -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 */