/* Supports special manufacturer commands from TI BQ20Z65 and BQ20Z75 IC. */
#define SBS_FLAGS_TI_BQ20ZX5 BIT(0)
+static const enum power_supply_property string_properties[] = {
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+};
+
+#define NR_STRING_BUFFERS ARRAY_SIZE(string_properties)
+
struct sbs_info {
struct i2c_client *client;
struct power_supply *power_supply;
struct delayed_work work;
struct mutex mode_lock;
u32 flags;
+ int technology;
+ char strings[NR_STRING_BUFFERS][I2C_SMBUS_BLOCK_MAX + 1];
};
-static char model_name[I2C_SMBUS_BLOCK_MAX + 1];
-static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1];
-static char chemistry[I2C_SMBUS_BLOCK_MAX + 1];
+static char *sbs_get_string_buf(struct sbs_info *chip,
+ enum power_supply_property psp)
+{
+ int i = 0;
+
+ for (i = 0; i < NR_STRING_BUFFERS; i++)
+ if (string_properties[i] == psp)
+ return chip->strings[i];
+
+ return ERR_PTR(-EINVAL);
+}
+
+static void sbs_invalidate_cached_props(struct sbs_info *chip)
+{
+ int i = 0;
+
+ chip->technology = -1;
+
+ for (i = 0; i < NR_STRING_BUFFERS; i++)
+ chip->strings[i][0] = 0;
+}
+
static bool force_load;
static int sbs_read_word_data(struct i2c_client *client, u8 address);
chip->is_present = false;
/* Disable PEC when no device is present */
client->flags &= ~I2C_CLIENT_PEC;
+ sbs_invalidate_cached_props(chip);
return 0;
}
return 0;
}
-static int sbs_get_battery_string_property(struct i2c_client *client,
- int reg_offset, enum power_supply_property psp, char *val)
+static int sbs_get_property_index(struct i2c_client *client,
+ enum power_supply_property psp)
{
- s32 ret;
+ int count;
- ret = sbs_read_string_data(client, sbs_data[reg_offset].addr, val);
+ for (count = 0; count < ARRAY_SIZE(sbs_data); count++)
+ if (psp == sbs_data[count].psp)
+ return count;
- if (ret < 0)
- return ret;
+ dev_warn(&client->dev,
+ "%s: Invalid Property - %d\n", __func__, psp);
- return 0;
+ return -EINVAL;
+}
+
+static const char *sbs_get_constant_string(struct sbs_info *chip,
+ enum power_supply_property psp)
+{
+ int ret;
+ char *buf;
+ u8 addr;
+
+ buf = sbs_get_string_buf(chip, psp);
+ if (IS_ERR(buf))
+ return buf;
+
+ if (!buf[0]) {
+ ret = sbs_get_property_index(chip->client, psp);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ addr = sbs_data[ret].addr;
+
+ ret = sbs_read_string_data(chip->client, addr, buf);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ }
+
+ return buf;
}
static void sbs_unit_adjustment(struct i2c_client *client,
return 0;
}
-static int sbs_get_property_index(struct i2c_client *client,
- enum power_supply_property psp)
-{
- int count;
- for (count = 0; count < ARRAY_SIZE(sbs_data); count++)
- if (psp == sbs_data[count].psp)
- return count;
-
- dev_warn(&client->dev,
- "%s: Invalid Property - %d\n", __func__, psp);
-
- return -EINVAL;
-}
-
-static int sbs_get_chemistry(struct i2c_client *client,
+static int sbs_get_chemistry(struct sbs_info *chip,
union power_supply_propval *val)
{
- enum power_supply_property psp = POWER_SUPPLY_PROP_TECHNOLOGY;
- int ret;
+ const char *chemistry;
- ret = sbs_get_property_index(client, psp);
- if (ret < 0)
- return ret;
+ if (chip->technology != -1) {
+ val->intval = chip->technology;
+ return 0;
+ }
- ret = sbs_get_battery_string_property(client, ret, psp,
- chemistry);
- if (ret < 0)
- return ret;
+ chemistry = sbs_get_constant_string(chip, POWER_SUPPLY_PROP_TECHNOLOGY);
+
+ if (IS_ERR(chemistry))
+ return PTR_ERR(chemistry);
if (!strncasecmp(chemistry, "LION", 4))
- val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+ chip->technology = POWER_SUPPLY_TECHNOLOGY_LION;
else if (!strncasecmp(chemistry, "LiP", 3))
- val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO;
+ chip->technology = POWER_SUPPLY_TECHNOLOGY_LIPO;
else if (!strncasecmp(chemistry, "NiCd", 4))
- val->intval = POWER_SUPPLY_TECHNOLOGY_NiCd;
+ chip->technology = POWER_SUPPLY_TECHNOLOGY_NiCd;
else if (!strncasecmp(chemistry, "NiMH", 4))
- val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
+ chip->technology = POWER_SUPPLY_TECHNOLOGY_NiMH;
else
- val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+ chip->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+
+ if (chip->technology == POWER_SUPPLY_TECHNOLOGY_UNKNOWN)
+ dev_warn(&chip->client->dev, "Unknown chemistry: %s\n", chemistry);
- if (val->intval == POWER_SUPPLY_TECHNOLOGY_UNKNOWN)
- dev_warn(&client->dev, "Unknown chemistry: %s\n", chemistry);
+ val->intval = chip->technology;
return 0;
}
int ret = 0;
struct sbs_info *chip = power_supply_get_drvdata(psy);
struct i2c_client *client = chip->client;
+ const char *str;
if (chip->gpio_detect) {
ret = gpiod_get_value_cansleep(chip->gpio_detect);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
- ret = sbs_get_chemistry(client, val);
+ ret = sbs_get_chemistry(chip, val);
if (ret < 0)
break;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
- ret = sbs_get_property_index(client, psp);
- if (ret < 0)
- break;
-
- ret = sbs_get_battery_string_property(client, ret, psp,
- model_name);
- val->strval = model_name;
- break;
-
case POWER_SUPPLY_PROP_MANUFACTURER:
- ret = sbs_get_property_index(client, psp);
- if (ret < 0)
- break;
-
- ret = sbs_get_battery_string_property(client, ret, psp,
- manufacturer);
- val->strval = manufacturer;
+ str = sbs_get_constant_string(chip, psp);
+ if (IS_ERR(str))
+ ret = PTR_ERR(str);
+ else
+ val->strval = str;
break;
case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
psy_cfg.of_node = client->dev.of_node;
psy_cfg.drv_data = chip;
chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN;
+ sbs_invalidate_cached_props(chip);
mutex_init(&chip->mode_lock);
/* use pdata if available, fall back to DT properties,
projects / linux-2.6-microblaze.git / blobdiff