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bq2415x_charger: Fix max battery regulation voltage

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As per the datasheets, maximum battery regulation voltage is 4440mV.

The formula is (voltage - offset) / step, so the maximum value is:
(4440 - 3500) / 20 = 47

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Thanks-to: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
This commit is contained in:
Alexandre Belloni 2013-10-16 16:08:31 +02:00 committed by Anton Vorontsov
parent e47bcba4a1
commit 3ed5cd79b8
1 changed files with 5 additions and 1 deletions
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6
drivers/power/bq2415x_charger.c
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@ -605,9 +605,13 @@ static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
{ {
int val = (mV/10 - 350) / 2; int val = (mV/10 - 350) / 2;
/*
* According to datasheet, maximum battery regulation voltage is
* 4440mV which is b101111 = 47.
*/
if (val < 0) if (val < 0)
val = 0; val = 0;
else if (val > 94) /* FIXME: Max is 94 or 122 ? Set max value ? */ else if (val > 47)
return -EINVAL; return -EINVAL;
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,