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| author | Hans de Goede <hdegoede@redhat.com> | 2017-04-14 20:32:47 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2017-05-01 12:37:16 +0200 |
| commit | c67c06939ee4a24fcad1235dd9632153533fdd4d (patch) | |
| tree | aa2196d3f620f12de7b0c6388e629c161cc0eed7 /drivers/power | |
| parent | 7f232af35620fe68746cb3da582062de965b286c (diff) | |
| download | linux-stable-c67c06939ee4a24fcad1235dd9632153533fdd4d.tar.gz linux-stable-c67c06939ee4a24fcad1235dd9632153533fdd4d.tar.bz2 linux-stable-c67c06939ee4a24fcad1235dd9632153533fdd4d.zip | |
power: supply: max17042_battery: Use sign_extend32 instead of DIY code
Use sign_extend32 to sign-extend variables where necessary instead of
DIY code.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/max17042_battery.c | 24 |
1 files changed, 3 insertions, 21 deletions
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index da7a75f82489..790dfa9d0a2e 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -106,13 +106,7 @@ static int max17042_get_temperature(struct max17042_chip *chip, int *temp) if (ret < 0) return ret; - *temp = data; - /* The value is signed. */ - if (*temp & 0x8000) { - *temp = (0x7fff & ~*temp) + 1; - *temp *= -1; - } - + *temp = sign_extend32(data, 15); /* The value is converted into deci-centigrade scale */ /* Units of LSB = 1 / 256 degree Celsius */ *temp = *temp * 10 / 256; @@ -302,13 +296,7 @@ static int max17042_get_property(struct power_supply *psy, if (ret < 0) return ret; - val->intval = data; - if (val->intval & 0x8000) { - /* Negative */ - val->intval = ~val->intval & 0x7fff; - val->intval++; - val->intval *= -1; - } + val->intval = sign_extend32(data, 15); val->intval *= 1562500 / chip->pdata->r_sns; } else { return -EINVAL; @@ -320,13 +308,7 @@ static int max17042_get_property(struct power_supply *psy, if (ret < 0) return ret; - val->intval = data; - if (val->intval & 0x8000) { - /* Negative */ - val->intval = ~val->intval & 0x7fff; - val->intval++; - val->intval *= -1; - } + val->intval = sign_extend32(data, 15); val->intval *= 1562500 / chip->pdata->r_sns; } else { return -EINVAL; |