regulator: max8998: Ensure enough delay time for max8998_set_voltage_buck_time_sel
commit e8d9897ff064b1683c11c15ea1296a67a45d77b0 upstream.
commit 81d0a6ae7befb24c06f4aa4856af7f8d1f612171 upstream.
Use DIV_ROUND_UP to prevent truncation by integer division issue.
This ensures we return enough delay time.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
[bwh: Backported to 3.2: delay is done by driver, not returned to the caller]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
index 5890265..1300383 100644
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -492,7 +492,7 @@
difference = desc->min + desc->step*i - previous_vol/1000;
if (difference > 0)
- udelay(difference / ((val & 0x0f) + 1));
+ udelay(DIV_ROUND_UP(difference, (val & 0x0f) + 1));
return ret;
}