diff options
Diffstat (limited to 'drivers/power/max17048_battery.c')
| -rw-r--r-- | drivers/power/max17048_battery.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/power/max17048_battery.c b/drivers/power/max17048_battery.c index e470d9161ac6..8c65cb48464c 100644 --- a/drivers/power/max17048_battery.c +++ b/drivers/power/max17048_battery.c @@ -26,6 +26,8 @@ #include <linux/jiffies.h> #include <linux/wakelock.h> #include <linux/thermal.h> +#include <linux/iio/consumer.h> +#include <linux/iio/types.h> #include <linux/platform_data/ina230.h> #include <linux/platform_data/tegra_edp.h> #include <generated/mach-types.h> @@ -931,6 +933,12 @@ static struct max17048_platform_data *max17048_parse_dt(struct device *dev) for (i = 0; i < MAX17048_DATA_SIZE; i++) model_data->data_tbl[i] = val_array[i]; + ret = of_property_read_u32(np, "read_batt_id", &val); + if (ret < 0) + pdata->read_batt_id = 0; + else + pdata->read_batt_id = val; + if ((!of_property_read_string(np, "set_current_threshold", &str)) && (!strncmp(str, "ina230", strlen(str)))) { pdata->set_current_threshold = ina230_set_current_threshold; @@ -1015,6 +1023,63 @@ static struct max17048_platform_data *max17048_parse_dt(struct device *dev) } #endif /* CONFIG_OF */ +static s32 show_battery_capacity(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_channel *channel; + int val, val2 = 0; + int ret; + struct i2c_client *client; + int capacity = 0; + + if (!max17048_data) + return 0; + + client = max17048_data->client; + + channel = iio_st_channel_get(dev_name(&client->dev), + "batt_id"); + if (IS_ERR(channel)) { + dev_err(&client->dev, + "%s: Failed to get channel batt_id, %ld\n", + __func__, PTR_ERR(channel)); + return 0; + } + + ret = iio_st_read_channel_raw(channel, &val, &val2); + if (ret < 0) { + dev_err(&client->dev, + "%s: Failed to read channel, %d\n", + __func__, ret); + return 0; + } + + if (val > 3300) { /* over 200Kohm*/ + dev_info(&client->dev, "adc: %d, No battery\n", val); + capacity = 0; + } else if (val > 819) { /* over 50Kohm*/ + dev_info(&client->dev, "adc: %d, 3200mA Battery\n", val); + capacity = 3200; + } else { + dev_info(&client->dev, "adc: %d, 4100mA Battery\n", val); + capacity = 4100; + } + return sprintf(buf, "%d\n", capacity); +} + +static s32 store_battery_capacity(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return 0; +} + +static struct device_attribute max17048_attrs[] = { + __ATTR(battery_capacity, 0644, + show_battery_capacity, store_battery_capacity), +}; + static int __devinit max17048_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1022,6 +1087,7 @@ static int __devinit max17048_probe(struct i2c_client *client, int ret; uint16_t version; u16 val; + int i; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); if (!chip) @@ -1104,7 +1170,24 @@ static int __devinit max17048_probe(struct i2c_client *client, } } + if (chip->pdata->read_batt_id) { + /* create sysfs node */ + for (i = 0; i < ARRAY_SIZE(max17048_attrs); i++) { + ret = device_create_file(&client->dev, + &max17048_attrs[i]); + if (ret) { + dev_err(&client->dev, + "%s: device_create_file failed(%d)\n", + __func__, ret); + goto file_error; + } + } + } + return 0; +file_error: + for (i = 0; i < ARRAY_SIZE(max17048_attrs); i++) + device_remove_file(&client->dev, &max17048_attrs[i]); irq_clear_error: free_irq(client->irq, chip); irq_reg_error: @@ -1119,12 +1202,15 @@ error2: static int __devexit max17048_remove(struct i2c_client *client) { struct max17048_chip *chip = i2c_get_clientdata(client); + int i; if (client->irq) free_irq(client->irq, chip); power_supply_unregister(&chip->battery); cancel_delayed_work_sync(&chip->work); wake_lock_destroy(&chip->wake_lock); + for (i = 0; i < ARRAY_SIZE(max17048_attrs); i++) + device_remove_file(&client->dev, &max17048_attrs[i]); mutex_destroy(&chip->mutex); return 0; |