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
