power: supply: sbs-battery: add MANUFACTURE_DATE support

Expose the battery's manufacture date to userspace.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c
index e6f61baa9bedea32a5b8b08be242e1850fe3bc09..4fa553d61db23fc4b43a8baf652d9825aec049c6 100644 (file)
--- a/drivers/power/supply/sbs-battery.c
+++ b/drivers/power/supply/sbs-battery.c
@@ -58,6 +58,8 @@ enum {
 #define SBS_VERSION_1_1                        2
 #define SBS_VERSION_1_1_WITH_PEC       3
 
+#define REG_ADDR_MANUFACTURE_DATE      0x1B
+
 /* Battery Mode defines */
 #define BATTERY_MODE_OFFSET            0x03
 #define BATTERY_MODE_CAPACITY_MASK     BIT(15)
@@ -171,6 +173,9 @@ static enum power_supply_property sbs_properties[] = {
        POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
        POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
        POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+       POWER_SUPPLY_PROP_MANUFACTURE_YEAR,
+       POWER_SUPPLY_PROP_MANUFACTURE_MONTH,
+       POWER_SUPPLY_PROP_MANUFACTURE_DAY,
        /* Properties of type `const char *' */
        POWER_SUPPLY_PROP_MANUFACTURER,
        POWER_SUPPLY_PROP_MODEL_NAME
@@ -682,6 +687,38 @@ static int sbs_get_chemistry(struct i2c_client *client,
        return 0;
 }
 
+static int sbs_get_battery_manufacture_date(struct i2c_client *client,
+       enum power_supply_property psp,
+       union power_supply_propval *val)
+{
+       int ret;
+       u16 day, month, year;
+
+       ret = sbs_read_word_data(client, REG_ADDR_MANUFACTURE_DATE);
+       if (ret < 0)
+               return ret;
+
+       day   = ret   & GENMASK(4,  0);
+       month = (ret  & GENMASK(8,  5)) >> 5;
+       year  = ((ret & GENMASK(15, 9)) >> 9) + 1980;
+
+       switch (psp) {
+       case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
+               val->intval = year;
+               break;
+       case POWER_SUPPLY_PROP_MANUFACTURE_MONTH:
+               val->intval = month;
+               break;
+       case POWER_SUPPLY_PROP_MANUFACTURE_DAY:
+               val->intval = day;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int sbs_get_property(struct power_supply *psy,
        enum power_supply_property psp,
        union power_supply_propval *val)
@@ -790,6 +827,12 @@ static int sbs_get_property(struct power_supply *psy,
                val->strval = manufacturer;
                break;
 
+       case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
+       case POWER_SUPPLY_PROP_MANUFACTURE_MONTH:
+       case POWER_SUPPLY_PROP_MANUFACTURE_DAY:
+               ret = sbs_get_battery_manufacture_date(client, psp, val);
+               break;
+
        default:
                dev_err(&client->dev,
                        "%s: INVALID property\n", __func__);