power_supply: Add voltage_ocv property and use it for max17042 driver
This adds a new sysfs file called 'voltage_ocv' which gives the
Open Circuit Voltage of the battery.
This property can be used for platform shutdown policies and
can be useful for initial capacity estimations.
Note: This patch is generated against linux-next branch.
Change-Id: If39fd1fa32b6d734ec86f2e188dab8fcd9414976
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Git-commit: a2ebfe2fc6e088a70d06cd15a5bc9bcb621cc195
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[xiaozhes@codeaurora.org: merging with msm-specific changes]
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index 04620c2..915767d 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -105,6 +105,7 @@
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_TEMP,
@@ -171,6 +172,13 @@
val->intval = ret * 625 / 8;
break;
+ case POWER_SUPPLY_PROP_VOLTAGE_OCV:
+ ret = max17042_read_reg(chip->client, MAX17042_OCVInternal);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret * 625 / 8;
+ break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = max17042_read_reg(chip->client, MAX17042_RepSOC);
if (ret < 0)