power: lc709203f: add interface to get battery soc

provide interface to get battery state of charge value.
charger driver need battery soc to configure input voltage
limit based on battery soc.

Bug 1516392

Change-Id: I06579e421fb05ea683bca77c69ba0596ea1d50c6
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Reviewed-on: http://git-master/r/542720
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>

diff --git a/drivers/power/lc709203f_battery.c b/drivers/power/lc709203f_battery.c
index e8d5d14e81793eae054d0f160af4dce96d9bfb86..5bfcca6fd88cfa1c8e5cefd37631566d7cfd95c4 100644 (file)
--- a/drivers/power/lc709203f_battery.c
+++ b/drivers/power/lc709203f_battery.c
@@ -115,6 +115,22 @@ static int lc709203f_write_word(struct i2c_client *client, u8 reg, u16 value)
        return ret;
 }
 
+static int lc709203f_get_battery_soc(struct battery_gauge_dev *bg_dev)
+{
+       struct lc709203f_chip *chip = battery_gauge_get_drvdata(bg_dev);
+       int val;
+
+       val = lc709203f_read_word(chip->client, LC709203F_RSOC);
+       if (val < 0)
+               dev_err(&chip->client->dev, "%s: err %d\n", __func__, val);
+       else
+               val =  battery_gauge_get_adjusted_soc(chip->bg_dev,
+                               chip->pdata->threshold_soc,
+                               chip->pdata->maximum_soc, val * 100);
+
+       return val;
+}
+
 static int lc709203f_update_soc_voltage(struct lc709203f_chip *chip)
 {
        int val;
@@ -346,6 +362,7 @@ done:
 
 static struct battery_gauge_ops lc709203f_bg_ops = {
        .update_battery_status = lc709203f_update_battery_status,
+       .get_battery_soc = lc709203f_get_battery_soc,
 };
 
 static struct battery_gauge_info lc709203f_bgi = {