From 3ed5cd79b82e9a055e0df3275eeb471ea0f1e2d7 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Wed, 16 Oct 2013 16:08:31 +0200 Subject: bq2415x_charger: Fix max battery regulation voltage MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Thanks-to: Pali Rohár Signed-off-by: Anton Vorontsov --- drivers/power/bq2415x_charger.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c index 0727f9256138..df893dd1447d 100644 --- a/drivers/power/bq2415x_charger.c +++ b/drivers/power/bq2415x_charger.c @@ -605,9 +605,13 @@ static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, { int val = (mV/10 - 350) / 2; + /* + * According to datasheet, maximum battery regulation voltage is + * 4440mV which is b101111 = 47. + */ if (val < 0) val = 0; - else if (val > 94) /* FIXME: Max is 94 or 122 ? Set max value ? */ + else if (val > 47) return -EINVAL; return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, -- cgit v1.2.3