diff options
Diffstat (limited to 'drivers/power/twl4030_madc_battery.c')
| -rw-r--r-- | drivers/power/twl4030_madc_battery.c | 135 |
1 files changed, 84 insertions, 51 deletions
diff --git a/drivers/power/twl4030_madc_battery.c b/drivers/power/twl4030_madc_battery.c index 7ef445a6cfa6..f5817e422d64 100644 --- a/drivers/power/twl4030_madc_battery.c +++ b/drivers/power/twl4030_madc_battery.c @@ -19,10 +19,14 @@ #include <linux/sort.h> #include <linux/i2c/twl4030-madc.h> #include <linux/power/twl4030_madc_battery.h> +#include <linux/iio/consumer.h> struct twl4030_madc_battery { - struct power_supply psy; + struct power_supply *psy; struct twl4030_madc_bat_platform_data *pdata; + struct iio_channel *channel_temp; + struct iio_channel *channel_ichg; + struct iio_channel *channel_vbat; }; static enum power_supply_property twl4030_madc_bat_props[] = { @@ -38,43 +42,34 @@ static enum power_supply_property twl4030_madc_bat_props[] = { POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, }; -static int madc_read(int index) +static int madc_read(struct iio_channel *channel) { - struct twl4030_madc_request req; - int val; + int val, err; + err = iio_read_channel_processed(channel, &val); + if (err < 0) + return err; - req.channels = index; - req.method = TWL4030_MADC_SW2; - req.type = TWL4030_MADC_WAIT; - req.do_avg = 0; - req.raw = false; - req.func_cb = NULL; - - val = twl4030_madc_conversion(&req); - if (val < 0) - return val; - - return req.rbuf[ffs(index) - 1]; + return val; } -static int twl4030_madc_bat_get_charging_status(void) +static int twl4030_madc_bat_get_charging_status(struct twl4030_madc_battery *bt) { - return (madc_read(TWL4030_MADC_ICHG) > 0) ? 1 : 0; + return (madc_read(bt->channel_ichg) > 0) ? 1 : 0; } -static int twl4030_madc_bat_get_voltage(void) +static int twl4030_madc_bat_get_voltage(struct twl4030_madc_battery *bt) { - return madc_read(TWL4030_MADC_VBAT); + return madc_read(bt->channel_vbat); } -static int twl4030_madc_bat_get_current(void) +static int twl4030_madc_bat_get_current(struct twl4030_madc_battery *bt) { - return madc_read(TWL4030_MADC_ICHG) * 1000; + return madc_read(bt->channel_ichg) * 1000; } -static int twl4030_madc_bat_get_temp(void) +static int twl4030_madc_bat_get_temp(struct twl4030_madc_battery *bt) { - return madc_read(TWL4030_MADC_BTEMP) * 10; + return madc_read(bt->channel_temp) * 10; } static int twl4030_madc_bat_voltscale(struct twl4030_madc_battery *bat, @@ -84,7 +79,7 @@ static int twl4030_madc_bat_voltscale(struct twl4030_madc_battery *bat, int i, res = 0; /* choose charging curve */ - if (twl4030_madc_bat_get_charging_status()) + if (twl4030_madc_bat_get_charging_status(bat)) calibration = bat->pdata->charging; else calibration = bat->pdata->discharging; @@ -113,29 +108,28 @@ static int twl4030_madc_bat_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { - struct twl4030_madc_battery *bat = container_of(psy, - struct twl4030_madc_battery, psy); + struct twl4030_madc_battery *bat = power_supply_get_drvdata(psy); switch (psp) { case POWER_SUPPLY_PROP_STATUS: if (twl4030_madc_bat_voltscale(bat, - twl4030_madc_bat_get_voltage()) > 95) + twl4030_madc_bat_get_voltage(bat)) > 95) val->intval = POWER_SUPPLY_STATUS_FULL; else { - if (twl4030_madc_bat_get_charging_status()) + if (twl4030_madc_bat_get_charging_status(bat)) val->intval = POWER_SUPPLY_STATUS_CHARGING; else val->intval = POWER_SUPPLY_STATUS_DISCHARGING; } break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: - val->intval = twl4030_madc_bat_get_voltage() * 1000; + val->intval = twl4030_madc_bat_get_voltage(bat) * 1000; break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; case POWER_SUPPLY_PROP_CURRENT_NOW: - val->intval = twl4030_madc_bat_get_current(); + val->intval = twl4030_madc_bat_get_current(bat); break; case POWER_SUPPLY_PROP_PRESENT: /* assume battery is always present */ @@ -143,23 +137,23 @@ static int twl4030_madc_bat_get_property(struct power_supply *psy, break; case POWER_SUPPLY_PROP_CHARGE_NOW: { int percent = twl4030_madc_bat_voltscale(bat, - twl4030_madc_bat_get_voltage()); + twl4030_madc_bat_get_voltage(bat)); val->intval = (percent * bat->pdata->capacity) / 100; break; } case POWER_SUPPLY_PROP_CAPACITY: val->intval = twl4030_madc_bat_voltscale(bat, - twl4030_madc_bat_get_voltage()); + twl4030_madc_bat_get_voltage(bat)); break; case POWER_SUPPLY_PROP_CHARGE_FULL: val->intval = bat->pdata->capacity; break; case POWER_SUPPLY_PROP_TEMP: - val->intval = twl4030_madc_bat_get_temp(); + val->intval = twl4030_madc_bat_get_temp(bat); break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: { int percent = twl4030_madc_bat_voltscale(bat, - twl4030_madc_bat_get_voltage()); + twl4030_madc_bat_get_voltage(bat)); /* in mAh */ int chg = (percent * (bat->pdata->capacity/1000))/100; @@ -176,12 +170,19 @@ static int twl4030_madc_bat_get_property(struct power_supply *psy, static void twl4030_madc_bat_ext_changed(struct power_supply *psy) { - struct twl4030_madc_battery *bat = container_of(psy, - struct twl4030_madc_battery, psy); - - power_supply_changed(&bat->psy); + power_supply_changed(psy); } +static const struct power_supply_desc twl4030_madc_bat_desc = { + .name = "twl4030_battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = twl4030_madc_bat_props, + .num_properties = ARRAY_SIZE(twl4030_madc_bat_props), + .get_property = twl4030_madc_bat_get_property, + .external_power_changed = twl4030_madc_bat_ext_changed, + +}; + static int twl4030_cmp(const void *a, const void *b) { return ((struct twl4030_madc_bat_calibration *)b)->voltage - @@ -192,19 +193,31 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev) { struct twl4030_madc_battery *twl4030_madc_bat; struct twl4030_madc_bat_platform_data *pdata = pdev->dev.platform_data; + struct power_supply_config psy_cfg = {}; + int ret = 0; - twl4030_madc_bat = kzalloc(sizeof(*twl4030_madc_bat), GFP_KERNEL); + twl4030_madc_bat = devm_kzalloc(&pdev->dev, sizeof(*twl4030_madc_bat), + GFP_KERNEL); if (!twl4030_madc_bat) return -ENOMEM; - twl4030_madc_bat->psy.name = "twl4030_battery"; - twl4030_madc_bat->psy.type = POWER_SUPPLY_TYPE_BATTERY; - twl4030_madc_bat->psy.properties = twl4030_madc_bat_props; - twl4030_madc_bat->psy.num_properties = - ARRAY_SIZE(twl4030_madc_bat_props); - twl4030_madc_bat->psy.get_property = twl4030_madc_bat_get_property; - twl4030_madc_bat->psy.external_power_changed = - twl4030_madc_bat_ext_changed; + twl4030_madc_bat->channel_temp = iio_channel_get(&pdev->dev, "temp"); + if (IS_ERR(twl4030_madc_bat->channel_temp)) { + ret = PTR_ERR(twl4030_madc_bat->channel_temp); + goto err; + } + + twl4030_madc_bat->channel_ichg = iio_channel_get(&pdev->dev, "ichg"); + if (IS_ERR(twl4030_madc_bat->channel_ichg)) { + ret = PTR_ERR(twl4030_madc_bat->channel_ichg); + goto err_temp; + } + + twl4030_madc_bat->channel_vbat = iio_channel_get(&pdev->dev, "vbat"); + if (IS_ERR(twl4030_madc_bat->channel_vbat)) { + ret = PTR_ERR(twl4030_madc_bat->channel_vbat); + goto err_ichg; + } /* sort charging and discharging calibration data */ sort(pdata->charging, pdata->charging_size, @@ -216,17 +229,36 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev) twl4030_madc_bat->pdata = pdata; platform_set_drvdata(pdev, twl4030_madc_bat); - power_supply_register(&pdev->dev, &twl4030_madc_bat->psy); + psy_cfg.drv_data = twl4030_madc_bat; + twl4030_madc_bat->psy = power_supply_register(&pdev->dev, + &twl4030_madc_bat_desc, + &psy_cfg); + if (IS_ERR(twl4030_madc_bat->psy)) { + ret = PTR_ERR(twl4030_madc_bat->psy); + goto err_vbat; + } return 0; + +err_vbat: + iio_channel_release(twl4030_madc_bat->channel_vbat); +err_ichg: + iio_channel_release(twl4030_madc_bat->channel_ichg); +err_temp: + iio_channel_release(twl4030_madc_bat->channel_temp); +err: + return ret; } static int twl4030_madc_battery_remove(struct platform_device *pdev) { struct twl4030_madc_battery *bat = platform_get_drvdata(pdev); - power_supply_unregister(&bat->psy); - kfree(bat); + power_supply_unregister(bat->psy); + + iio_channel_release(bat->channel_vbat); + iio_channel_release(bat->channel_ichg); + iio_channel_release(bat->channel_temp); return 0; } @@ -243,3 +275,4 @@ module_platform_driver(twl4030_madc_battery_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Lukas Märdian <lukas@goldelico.com>"); MODULE_DESCRIPTION("twl4030_madc battery driver"); +MODULE_ALIAS("platform:twl4030_madc_battery"); |