This patch adds support for the sbs-battery driver to export a battery's
manufacture date as a field in sysfs. It is exported as a simple Y/M/D
format for ease of consumption.
Signed-off-by: Tim Wawrzynczak <[email protected]>
Change-Id: Ia952624f33700587f4d71ad09ad68c0940c7f508
---
drivers/power/supply/sbs-battery.c | 31 +++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c
index f8d74e9f79317..989625be80743 100644
--- a/drivers/power/supply/sbs-battery.c
+++ b/drivers/power/supply/sbs-battery.c
@@ -42,6 +42,7 @@ enum {
REG_DESIGN_VOLTAGE_MAX,
REG_MANUFACTURER,
REG_MODEL_NAME,
+ REG_MANUFACTURE_DATE,
};
/* Battery Mode defines */
@@ -112,6 +113,10 @@ static const struct chip_data {
SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 0x19, 0, 65535),
[REG_DESIGN_VOLTAGE_MAX] =
SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0, 65535),
+ /* Manufacture Date is encoded as a 16-bit register, but is exported
+ * from here as a string */
+ [REG_MANUFACTURE_DATE] =
+ SBS_DATA(POWER_SUPPLY_PROP_MANUFACTURE_DATE, 0x1B, 0, 65535),
[REG_SERIAL_NUMBER] =
SBS_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
/* Properties of type `const char *' */
@@ -145,7 +150,8 @@ static enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
/* Properties of type `const char *' */
POWER_SUPPLY_PROP_MANUFACTURER,
- POWER_SUPPLY_PROP_MODEL_NAME
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURE_DATE,
};
/* Supports special manufacturer commands from TI BQ20Z75 IC. */
@@ -170,6 +176,10 @@ static char model_name[I2C_SMBUS_BLOCK_MAX + 1];
static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1];
static bool force_load;
+/* manufacture_date is returned as a 16-bit word in the smart battery itself.
+ * It is decoded here and displayed as "%4d/%2d/%2d", Y/m/d format. */
+static char manufacture_date[11];
+
static int sbs_read_word_data(struct i2c_client *client, u8 address)
{
struct sbs_info *chip = i2c_get_clientdata(client);
@@ -682,6 +692,25 @@ static int sbs_get_property(struct power_supply *psy,
ret = sbs_get_battery_property(client, ret, psp, val);
break;
+ case POWER_SUPPLY_PROP_MANUFACTURE_DATE:
+ ret = sbs_get_property_index(client, psp);
+ if (ret < 0)
+ break;
+
+ ret = sbs_get_battery_property(client, ret, psp, val);
+
+ /* Convert encoded data (from the SBS 1.1 spec) into a string:
+ * bits 9-15 are the year, encoded as years since 1980
+ * bits 5-8 are the month, encoded as 1-12
+ * bits 0-4 are the day of the month, encoded as 1-31 */
+ snprintf(manufacture_date, sizeof(manufacture_date),
+ "%4d/%2d/%2d",
+ ((val->intval >> 9) & 0x7f) + 1980,
+ (val->intval >> 5) & 0xf,
+ val->intval & 0x1f);
+ val->strval = manufacture_date;
+ break;
+
case POWER_SUPPLY_PROP_MODEL_NAME:
ret = sbs_get_property_index(client, psp);
if (ret < 0)
--
2.26.2