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authorJoshua Clayton <stillcompiling@gmail.com>2016-08-11 19:59:12 +0300
committerSebastian Reichel <sre@kernel.org>2016-08-16 00:14:55 +0300
commit957cb720518341abf19009044f240a6342bdd039 (patch)
tree026620627f51333a35ef9c2e16511f47a4d385c0 /drivers/power
parent492ff9d8f5fa6ad44288050238b7961d457a239d (diff)
downloadlinux-957cb720518341abf19009044f240a6342bdd039.tar.xz
sbs-battery: add ability to get battery capacity
Battery capacity level is a standard feature of sbs battery That can be used to tell what the remainig battery capacity is, and can tell if the battery has not been calibrated/initialized, which makes the capacity and charging/discharging percentages invalid. Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/sbs-battery.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c
index 31f3e333b950..e1dfb3e7aee4 100644
--- a/drivers/power/supply/sbs-battery.c
+++ b/drivers/power/supply/sbs-battery.c
@@ -41,6 +41,7 @@ enum {
REG_TIME_TO_EMPTY,
REG_TIME_TO_FULL,
REG_STATUS,
+ REG_CAPACITY_LEVEL,
REG_CYCLE_COUNT,
REG_SERIAL_NUMBER,
REG_REMAINING_CAPACITY,
@@ -68,6 +69,7 @@ enum sbs_battery_mode {
#define MANUFACTURER_ACCESS_SLEEP 0x0011
/* battery status value bits */
+#define BATTERY_INITIALIZED 0x80
#define BATTERY_DISCHARGING 0x40
#define BATTERY_FULL_CHARGED 0x20
#define BATTERY_FULL_DISCHARGED 0x10
@@ -110,6 +112,8 @@ static const struct chip_data {
SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0, 65535),
[REG_STATUS] =
SBS_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
+ [REG_CAPACITY_LEVEL] =
+ SBS_DATA(POWER_SUPPLY_PROP_CAPACITY_LEVEL, 0x16, 0, 65535),
[REG_CYCLE_COUNT] =
SBS_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
[REG_DESIGN_CAPACITY] =
@@ -131,6 +135,7 @@ static const struct chip_data {
static enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
@@ -376,8 +381,23 @@ static int sbs_get_battery_property(struct i2c_client *client,
if (ret >= sbs_data[reg_offset].min_value &&
ret <= sbs_data[reg_offset].max_value) {
val->intval = ret;
- if (psp != POWER_SUPPLY_PROP_STATUS)
+ if (psp == POWER_SUPPLY_PROP_CAPACITY_LEVEL) {
+ if (!(ret & BATTERY_INITIALIZED))
+ val->intval =
+ POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+ else if (ret & BATTERY_FULL_CHARGED)
+ val->intval =
+ POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else if (ret & BATTERY_FULL_DISCHARGED)
+ val->intval =
+ POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ else
+ val->intval =
+ POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
return 0;
+ } else if (psp != POWER_SUPPLY_PROP_STATUS) {
+ return 0;
+ }
if (ret & BATTERY_FULL_CHARGED)
val->intval = POWER_SUPPLY_STATUS_FULL;
@@ -589,6 +609,7 @@ static int sbs_get_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_STATUS:
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
case POWER_SUPPLY_PROP_CYCLE_COUNT:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_CURRENT_NOW: